how to design and build a sandblasting room

Guide to Design and Build a Sandblasting Room

Sandblasting room is a kind of machine that can make various abrasives (silica sand, iron sand, steel shot, etc.) sprayed onto the surface of the workpiece with the help of air pressure. Rust, paint, scale, etc. According to the injection method, it is divided into self-priming and press-in type. Because the press-in type mixes the compressed air and the abrasive in the same container, the compressed air is fully utilized, and the air flow and sand volume are easy to adjust. It is suitable for large-area cleaning and has high efficiency. It is also widely used in pipes. Inner wall cleaning.

What is sandblasting?

A method of cleaning surfaces with high-speed moving grit. It can remove the oxide skin, grease, patent skin, etc. on the surface to obtain a more uniform surface quality. Subsequent procedures can be welding, oxidation, coating, surface chemical heat treatment, phosphating, etc. Sand blasting can generate residual compressive stress on the surface of the workpiece, make the surface quality of the workpiece uniform, and improve the fatigue strength of the workpiece. The effect of strengthening is worse than that of shot blasting, and the deformation of the workpiece is smaller than that of shot blasting.

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Features of a Sandblasting Booth/Sandblasting Room

The main function of the sandblasting room is to remove the rust, oxides, etc. on the surface of the workpiece by manually controlling the blasting gun to meet the requirements of painting or spraying.

At the same time, workers wear protective clothing, helmets, etc., which will not harm workers. Moreover, the sandblasting room is equipped with a dust collector system, which can achieve the state of no dust in the chamber body during work, and meet the environmental protection requirements of various places.

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How to design and build a sandblasting room?

As an investment product, how to design a suitable sandblasting room is a question worthy of attention. A suitable sandblasting room can not only help you save costs, but also create profits for you and help your business to a higher level.

Choosing a sandblasting room is a relatively open question, but in general, these criterions should always be followed:

1 The size of sandblasting room

You need an encloser place to put the sandblasting room. The size of the space depends on the size of object item that need to sandblasting. And when designing the size of the room, in addition to the size of the workpiece, you also need to consider the area required by the workers for sandblasting activities, the best blasting distance between the spray gun and the workpiece, etc. Generally, adding a distance of 1m around the workpiece is sufficient.

2 Material Handling system

The conveying method of the workpiece is also the focus of attention when designing the blasting room. How to put the items you need to blast into the blasting room, and handle them safely and conveniently, and then move the items out for storage, or proceed to the next process?

Most users will choose a trolley with rails for material handling and movement. This is the most economical and safe method. During sandblasting, the trolley is parked in the sandblasting room and the workpiece can be easily sandblasting.

If you are handling very large and heavy pieces of equipment like a pump station or engine block, with low volume, using a forklift could be the right solution for you.

Another method is to install an overhead conveyor on the roof of the blasting room, which allows the items to hang below them and moved in and out the blasting room.

Some users will choose the crane they already own, and design a movable roof controlled by cylinder, can let the crane into the blasting area with workpieces when the movable roof is opened.

3 Floor recovery system

Floor Recovery System is an efficient and inexpensive solution for recovering used abrasive with minimal effort from operator. System is suitable for large or small rooms, and offers flexibility in recovery floor layouts. Abrasive residues must be swept or shoveled into floor hopper to be recovered by system.

This recovery system can handle major light-to-heavy abrasives available on the market today, including heavy media such as aluminum oxide, steel shot, and steel grit. With media recovery capacity of over 2,000 lb. per hour and various floor hopper layouts, this system is designed for maximizing operator productivity while simplifying room cleaning after blasting operations.

4 Sandblasting Room Ventilation

During the sandblasting process, a large amount of dust will be generated, which will make the inside of room dusty. And the chemical nature of the dust will endanger health. Designing a suitable dust collector is needed.

There are three different airflow options to achieve this:

  1. Down-draft
  2. End-to-center
  3. Cross-draft

The working principle of the dust removal system in the room is: because the dust extraction fan extracts the gas and dust in the sandblasting room, the airflow outside the sandblasting room enters the sandblasting room through the coarse filter on the top of the sandblasting room, and then passes through the top of the sandblasting room. The uniform flow plate enters the sandblasting studio in the sandblasting room, forming a top-down airflow on the cross section of the sandblasting room, and the dust and dirt in the sandblasting room enter the dust extraction port with the airflow, and finally pass through the dust removal The pipeline enters the dust removal system, and the clean air is filtered by the dust removal system and discharged into the atmosphere. The dust and dirt are stored in the dust cylinder for regular cleaning.

How to calculate the air volume of dust collector in the sandblasting room?

Calculated by cross-sectional area. The method of calculating the cross-sectional area is to multiply the length by the width. It is important to explain here that the length and width are the areas that the ventilation can pass through. If there are other flowing air inlets besides the door, it should be added for rational calculation. :Air volume=cross-sectional area*wind speed*3600


It’s also important to consider the return on investment (ROI) when building a blast room facility. The amount of blasting done over a given period and the number of employees required both will influence blast room decision-making. Additionally, selecting the proper abrasive requires a thorough consideration of all of the parts that will be blasted. For example, mineral abrasives break down faster than steel grit abrasives but allow for greater flexibility for various blasting needs. Disposal costs also need to be factored in and can vary greatly depending on material and volume.

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As a professional sandblasting room manufacturer, we would like to give quotation to all customers as reference, so please contact us if you are interested in sand blasting room.

What is sandblasting room 1

Factors to consider when designing a modern sandblasting room

The sandblasting room has always been used as a kind of equipment for us to treat and clean the surface of the workpiece, but with the continuous development of society and technology, the requirements for the sandblasting room have become more and more, and it is not only required to handle the workpiece well. Now, new requirements are put forward for environmental protection, safety, practicability, low energy consumption and safety.

Environmental protection requirements

We all know that when the sandblasting room is in use, it is easy to form a large amount of dust. These dusts pollute the air and cause serious dust pollution. It is necessary to require the equipment to be environmentally friendly when used. Minimize dust leakage. In addition, these dusts can also endanger the health of operators.

Safety requirements

Safety has always been the theme of enterprise production, especially during sandblasting, iron sand is ejected from high-pressure air, which has a lot of energy. Once it is sprayed on people, it will cause serious harm to people, so we Be sure to pay attention to safety when using it. During the installation, the safety of the staff must be taken into account, and the room structure and electrical system must be reasonably designed.

Practical requirements

Practical requirements have always been our requirements for equipment. Practical requirements are that the workpiece can be handled well, the failure rate is low, and the maintenance is simple and convenient.

Energy-saving requirements

Because a large amount of electric energy is used during sandblasting, it is also an important requirement for current equipment to reduce power consumption while ensuring air pressure.

Advanced requirements

It is necessary to improve the advanced nature of the sandblasting room as much as possible, which is mainly reflected in the efficiency, convenient and safe control, and dust treatment. It can be said that the advanced nature is the summary of the above four items.

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Sandblasting room application range

Pretreatment: Electroplating, painting, spraying, etc. are all covered by sandblasting before processing, the surface is absolutely clean, and at the same time, the adhesion and anti-corrosion ability of the covering layer are greatly improved.

Cleaning: remove oxide scale, residue and dirt from metal workpieces such as castings, stamping parts, welding parts, and heat-treated parts; clean the surface of non-metallic products, remove black spots on the surface of ceramic blanks and restore paint patterns, etc.

Refurbishment of old parts: refurbishment and cleaning of all moving parts such as automobiles, motorcycles, and electromechanical equipment. At the same time, the fatigue stress is eliminated and the service life is prolonged.

Light decoration: all metal products and non-metal products (plastic, crystal, glass, etc.) surface traces are eliminated, and the argon light matte surface treatment can improve the quality of the product surface.

Mould processing: Argon light matte processing on the mould surface, graphics and text production, and mould cleaning, so as not to damage the mould surface and ensure the precision of the mould.

Burr treatment: the micro burr of machined parts is removed, and the plastic overflow burr of injection-molded parts is eliminated.

Rework of defective products: Removal of defective covering layers of products, removal of poor surface coloring and printing.

Strengthening: Increase the surface hardness of metal parts and eliminate stress, such as surface treatment of aircraft blades, springs, machining tools and weapons.

Etching anti-skid processing: metal products, non-metal products surface etching patterns, text and anti-skid treatment, such as: marble, handle anti-skid, seals, stone inscriptions and so on.

Treatment of denim clothes: The effect of scrubbing, whitening and cat whiskers on denim clothes is achieved.

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Guidelines for safe operation of blasting room

 1. Check before start working.

  • Check whether each safety shield is complete and reliable.
  • Check whether each control power supply is connected reliably and whether the grounding is reliable.
  • Check whether the main gas circuit connection is firm and reliable, and whether the fasteners are loose.
  • Check whether the handle switch circuit and the sandblasting pipe are damaged, whether the joints and spray guns are worn, and whether the joints and spray guns are worn.
  • Check whether the flexible connection parts are damaged.
  • Check whether the oil level in the fan coupling meets the requirements. If it is abnormal or does not meet the requirements, it must be dealt with and replaced in time to prevent accidents.
  • The air storage tank, pressure gauge, and safety valve should be inspected regularly. The filter element in the sand tank should be inspected and sorted out once a week, and the filter element should be replaced according to the degree of wear and tear of the filter element.

2. Add abrasive

  • Check whether the abrasive size of the purchased sand meets the requirements of the specification.
  • The sandblasting abrasive size should be consistent with the work requirements.
  • When adding abrasive, clean and screen the foreign matter in the abrasive.

3. Trial sandblasting

  • Start the air compressor and ventilation and dust removal equipment five minutes before work, and run it for five minutes to see if the operation is normal.
  • The compressed air valve should be opened slowly, the air pressure must not exceed 0.8mpa, and carefully observe whether the fan is running normally.

4. Sandblasting

  • Move the work into the sandblasting room and place it smoothly. Small pieces must be reliably fixed.
  • Turn on the backflush gas source and the backflush control switch.
  • Wear sandblasting overalls and take precautions before sandblasting.
  • Hold the spray gun (the muzzle is not allowed to face people), aim the gun muzzle at the sandblasting part of the workpiece, and start the handle switch to start the operation.
  • During the sandblasting operation, it is forbidden for irrelevant personnel to approach. When cleaning and adjusting the operating parts, the machine should be ordered and the power supply should be cut off.

5. Shut down

  • Turn off the handle switch and stop the sandblasting operation.
  • Turn off the dust removal fan.
  • After the dust removal fan is stopped, keep the backflushing air source and the backflushing power supply and continue to backflush the dust for about 5 minutes.
  • Turn off the air supply and power supply.
  • Clean the equipment, arrange the blasting tools and guards.
  • Clean up the dust.

6. Others

  • Regular cleaning (100 hours of work, high humidity areas, compressed air not freeze-drying may shorten the cleaning cycle) the abrasive and dust adhering to the filter cartridge in the dust collector to ensure the normal operation of the equipment.
  • Before starting the machine, the ball valve at the lower part of the air bag must be opened, and the condensed water in the air bag must be drained, so as not to affect the blowback effect.
  • The gate must be closed during blasting.
  • When the trolley enters and exits, it should prevent hitting the gate or personnel, and pay attention to prevent the sandblasting pipe from being pressed.
  • It is forbidden to leave large particles or soft objects such as cigarette butts, cotton yarn, screws, etc. in the sandblasting room, so as not to enter the honeycomb floor and cause blockage.
  • It is forbidden to cover the air supply opening of the recycling floor (the position of the end of each honeycomb floor) or add sand from here, so as to avoid the sand recycling being ineffective or blocking the recycling pipeline.
  • The opening of the recovery fan and the dust removal fan should be carried out after one of them is running stably, so as not to start at the same time and cause the starting current to be too large.
  • After each work, all residual abrasives in the sandblasting room must be recovered.
  • The protective net of the lighting fixtures in the sandblasting room should be replaced in time to avoid damage to the fixtures.
  • The dust collector should release ash once a week, and the released ash should be cleaned up in time.
  • The cyclone dust collector should release ash once a week, and the released ash should be cleaned up in time.
  • Regularly check the oil level in the bearing gearbox of the dust removal fan, and add oil if necessary.
  • The dust collection of the filter cartridge should be checked through the dust collector observation window every six months. If the filter cartridge is found to collect too much dust or is damaged, it should be cleaned or replaced in time.
  • Every half month, the external spray chain, screw mechanism and internal spray rack and pinion mechanism should be checked and cleaned and lubricated.
  • Whether the sensor is in good condition should be checked every half month. The detection method is to use the metal sheet induction sensor in the power-on state, the light is on as normal, and the light is off as damaged.

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The operation process of sandblasting room

The most widely used sandblasting room in the field of rust removal of workpieces is the automatic sandblasting room, which is applied to various industries and has the advantages of convenient operation and high production efficiency. The operation process of the automatic sandblasting room equipment is as follows.

  1. The gas storage tanks, pressure gauges, and valves of the automatic sandblasting room should be checked regularly. The gas storage tank discharges dust once every two weeks, and the filter in the sand tank is checked once a month.
  2. Check whether the ventilation pipe of the sandblasting equipment and the door of the automatic sandblasting equipment are sealed. Five minutes before work, the ventilation and dust removal equipment must be activated. When the ventilation and dust removal equipment fails, the equipment is prohibited from working.
  3. Wear protective equipment before work. It is not allowed to operate automatic sandblasting equipment with bare arms.
  4. The compressed air valve of automatic sandblasting equipment should be opened slowly, and the air pressure must not exceed 0.8MPa.
  5. It is not allowed to blow dust on the body with compressed air in the automatic sandblasting room.
  6. When the sandblasting equipment is working, no unrelated persons are allowed to approach. When cleaning and adjusting the operating parts, the machine should be shut down.
  7. The sandblasting equipment’s operating procedures The sand size should be compatible with the work requirements, generally between ten and twenty, and the sand should be kept dry.
  8. After the work is finished, the ventilation and dust removal equipment of the automatic sandblasting machine should continue to operate for five minutes and then shut down to discharge indoor dust and keep the site clean.

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Maintenance of sandblasting room

In order to make the sand blasting room have a longer service life and prevent possible dangers, we must maintain and maintain the blasting room regularly. So how to maintain the sand blasting room?

The sandblasting room is a kind of equipment that meets the current environmental protection needs. During the use of the equipment, if you want to always maintain the use and environmental performance of the equipment, regular maintenance and maintenance are indispensable.

Sandblasting pipeline, gas path

Check whether the sandblasting hose is damaged and replace it immediately. Check whether the connection is firm, and if there is leakage, eliminate it immediately.

Check the damage, wear and connection of the air pipe to ensure that each joint is sealed reliably. If it is worn, it should be replaced immediately.

Floor recovery system

At work and after get off work every day, check whether there are large impurities in the  floor recovery system, if so, it should be removed.

Artificial respirator

Before going to get off work, check whether the protective glass of the respirator is damaged or whether it affects the processing operation. If it is affected, replace it immediately. Ensure personal safety; check the air filter and air source of the respirator to ensure normal air supply.

Because the glass of the protective clothing is fragile, it should be handled with care during sandblasting. Don’t touch it indiscriminately, and it should be kept stable when not in use.

Blasting gun, nozzle

Check the wear of the gun and nozzle, if it is severely worn or the efficiency of the sandblasting process is significantly reduced, replace it immediately.

Environmental protection sandblasting room Because the nozzle, protective clothing glass, spray gun switch and other parts are fragile, you should hold it gently during sandblasting, do not shake or touch, and keep it steady when not in use.

Sand control valve sand discharge adjustment lever

Check whether the adjusting rod is worn out and must be replaced in advance.

Protective rubber in the room

Check whether the rubber in the room is damaged and whether it is replaced according to the situation.

Door, safety power switch, gun switch

Check whether the gate control safety switch and spray gun switch are sensitive and effective. If the action fails, it should be repaired immediately.


Check the seals, especially the door seals. If they are found to be invalid, they should be replaced immediately.

Electrical control

Check whether the operation control buttons of each device are normal. If an abnormality is found, it should be repaired immediately.


Check the protective glass, ballast and bulb usage of the lamp.

Filter dust box ash box

Clean the dust in the dust box of the filter element and the dust box of the separator before work.

According to the above-detailed understanding of the maintenance and maintenance methods of the environmental protection sandblasting room, the equipment can be used better, the failure of the equipment can be reduced, and the service life of the equipment can be prolonged on the premise of ensuring the efficiency of the equipment.

Sandblasting suit

Whenever workers are sandblasting, the steel sand will hit the surface of the workpiece, and at the same time, the steel sand will splash around, the splashing steel sand will hurt the workers, and the workpiece will produce a lot of dust after descaling, the dust will cause harm to the human respiratory system, so the workers must wear protective clothing and sandblasting helmets whenever they work. Sandblasting suits are used to protect workers. They consist of sandblasting helmets, sandblasting suits, gloves, and breathing filters, with which workers can work safely when they wear them.


Abrasive blasting is the process of cleaning the surface of rough chemical parts by using the impact of steel sand at high speed. Abrasive blasting with sands containing crystalline silica can cause serious or fatal respiratory disease. We use steel grit instead of abrasives containing Silicon dioxide to protecting workers. There are many different types of steel shot, including steel grit, steel shot, cut shot, abrasive shot and stainless steel shot, and the type of shot to be used when blasting is adjusted to suit different needs.

Advantages of sandblasting room

The sandblasting room can be designed and manufactured according to the customer’s product characteristics and sandblasting requirements. There is no need to design and manufacture complex foundations, which saves foundation construction costs and greatly saves engineering costs. There is no need for a large amount of abrasives to be stocked in the recycling spiral.

The abrasive recovery rate The main electrical components are imported products, which have the advantages of stable performance, safety and reliability, long service life, simple maintenance, etc.; the sandblasting room has high-definition visibility inside the chamber, and the room body is naturally filled with air, which saves energy Consumption; the sandblasting room adopts two-stage dust removal, the first stage adopts a cyclone separator, and the second stage adopts a filter-type dust removal system.

The total dust removal efficiency can reach more than 99.99%; on the upper part of the front roof of the sandblasting room, there is a sound “Light alarm system” is equipped with an emergency stop call button in the sandblasting room; the electrical control of each system adopts interlocking control. When one of the systems fails, the related systems stop working and the spray gun stops spraying; the sandblasting room adopts Architectural decoration design, simple appearance, beautiful, standardized, good noise reduction effect, and convenient installation.


How to operate the sandblasting room correctly

 What are the safe operating procedures for sandblasting rooms and sandblasters? The following is a detailed description of these two aspects of knowledge. Among them, the safety operating procedures of the sandblasting room are divided into several parts, including inspection, sanding, sandblasting, sandblasting, shutdown and other parts before starting up. Hope The following introductions will enable readers to understand the safe operating procedures of the sandblasting room and sandblasting workers.

 The safe operation rules of the sandblasting room

  1. Check before starting

(1) Check whether the safety shields are complete and fixed reliably.

(2) Check whether the control power supply is connected reliably and whether the grounding is reliable.

(3) Check whether the main gas circuit connection is firm and reliable and whether the fasteners are loose.

(4) Check whether the pipes such as the handle switch circuit and the sandblasting pipe are damaged, whether the joints and spray guns are worn, and whether the joints and spray guns are worn.

(5) Check whether the soft connection parts are damaged.

(6) Check whether the oil level in the fan coupling meets the requirements. Any abnormalities or non-compliance with requirements must be dealt with and replaced in time to prevent accidents.

(7) Gas storage tanks, pressure gauges, and safety valves should be inspected regularly. The filter element in the sand tank should be inspected and sorted out once a week, and the filter element should be replaced according to the degree of loss of the filter element.

  1. Add sand

(1) Check whether the size of the selected sand material meets the requirements of the specification.

(2) The blasting particle size should be consistent with the work requirements.

(3) Clean the foreign matter in the abrasive when adding sand.

  1. Test sandblasting

(1) The air compressor and ventilation and dust removal equipment must be started five minutes before work, and run dry for five minutes to observe whether the operation is normal.

(2) The compressed air valve should be opened slowly, and the air pressure must not exceed 0.8mpa. Carefully observe whether the fan is operating normally.

How to operate the sandblasting room correctly 1

  1. Sandblasting

(1) Move the work into the blasting room and place it in a stable manner. Small pieces must be allowed to be fixed.

(2) Turn on the back-blowing air source and back-blowing control switch.

(3) Wear sandblasting overalls and protect them before sandblasting.

(4) Hold the spray gun (the muzzle is not allowed to face people), aim the muzzle at the sandblasting part of the workpiece, and activate the handle switch to start work.

(5) During sandblasting operations, no unrelated persons are allowed to approach. When cleaning and adjusting the operating parts, the machine should be ordered and the power supply should be cut off.

  1. Shut down

(1) Turn off the handle switch and stop the sandblasting operation.

(2) Turn off the dust removal fan.

(3) After the dust removal fan stops, keep the back-blowing air source and back-blowing power supply to continue back-blowing the dust for about 5 minutes.

(4) Turn off the air source and power supply.

(5) Clean the equipment, tidy up sandblasting tools and protective devices.

(6) Clean up dust.

  1. Other

(1) Regularly clean the abrasives and dust adhering to the filter cartridge of the dust collector to ensure the normal operation of the equipment.

(2) Before starting the machine, the ball valve at the bottom of the air bag must be opened to drain the condensed water of the air bag, so as not to affect the blowback effect.

Safety operating rules for sandblasters

  1. When working, you must wear dust masks and protective glasses.
  2. Before sandblasting, start the ventilation and dust removal equipment and check whether all parts of the equipment are normal.
  3. When there is no ventilation and dust removal equipment or the ventilation and dust removal equipment fails, sandblasting is not allowed.
  4. The sandblasting chamber door and observation glass window must be closed before sandblasting can be carried out.
  5. When starting the sandblasting machine, turn on the compressed air switch first, and then turn on the sand controller; when shutting down, stop the sand controller first, and then stop the compressed air.
  6. The observation glass must be transparent. The nozzle of the sandblasting should be kept unblocked, and repaired if it is blocked, and the sandblasting machine should not be hit.

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How many indispensable benefits does the sandblasting room have?

  • Compatible with environmental regulations
  • Keep the plant environment clean
  • Avoid air pollution caused by open-air blasting
  • Switch to indoor sandblasting
  • Switching to an expensive chemical stripping method at the front end
  • Cost of chemicals and their handling
  • Protect employees from dust and toxic chemicals
  • Material costs are eliminated by switching from expensive single-use sand to recyclable abrasives
  • Use abrasive media to remove corrosion, scale, old coating, debris, burrs
  • Provide anchoring patterns to promote better paint adhesion
  • Sandblasting with penning media improves the fatigue life of steels and many other metals
  • Easily sandblasting of heavy and large components
  • Sandblasting in an enclosed room reduces weather restrictions in open-air sandblasting
  • Sandblasting rooms is customized according to component specifications

Application of sandblasting room

The application of sandblasting room is wide, we can generally summarize it as below:
1. Pretreatment of electroplating, paint spraying, coating, etc. to completely clean the surface and improve the adhesion and anti-corrosion ability.
2. Cleaning the mill scale/residues/dirt of casting/pressing /welding/heat treatment work piece, cleaning the surface of non-metal items, cleaning the black spots on the ceramic embryo surface, restoring paint grain pattern, etc.
3. Refurnishing sports part of car, motorcycle, electromechanical device, etc., eliminating fatigue stress and extending working life.
4. Removing surface marks of metal/non-metal items, dumb face and fog treatment processing to enhance the product grade.
5. Dumb face and fog treatment of mould, text composition, mould cleaning without damage to the mould.
6. Removing the tiny burrs of mechanical parts and injection plastic parts.
7. Removing unqualified covering,color and printing of products.
8. Enhancing the surface hardness of metal work piece and eliminating stress, such as processing plane vane, spring, machining knife, weapons etc.
9. Blast rooms come in many sizes, some of which are big enough to accommodate very large or uniquely shaped objects like rail cars, commercial and military vehicles, construction equipment, and aircraft.

Benefits of sandblasting room

Via removal of rust, coatings, and other surface materials sandblasting can make sure the new coatings better adhere to the surface of the item. Sandblasting is more friendly for the environment. It not only eliminates chemical clean costs but also can reduce toxic chemical exposure. The sandblasting room can allow companies to arrange the production under the control of the weather conditions, time of the day, or other activities that occurred nearby. This multi-function machine can save more costs, and in fact, the sandblasting room can pay for itself in just a year.

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Requirements and preparation of sandblasting room

The sandblasting system relies on a modern, well-designed sandblasting chamber to ensure a closed, controlled, and clean environment for abrasive recovery. Whether it is to remove an existing coating or to prepare a surface for a new coating, it is essential to use an air compressor for optimal surface treatment.

Sandblasting rooms also have many sizes and material preparation requirements. Some factors to consider include the size and weight of the maximum workpiece, material handling method, sandblasting time, and base material. Also, the width and length of the room had to be increased by four to five feet, depending on the size of the largest piece. The height of the room is also determined by the largest workpiece, but material handling plays an important role in this.

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Components and design of the sandblasting room

The dust collection system is the key component of the sandblasting room. Reverse pulse cartridge precipitators are now standard because they have a reliable exhaust motor that takes the air out of space and traps it in the filter. These collectors also feature enhanced pleated paper to improve filtration efficiency and reduce size requirements for the facility’s dust collection system. Proper maintenance, such as occasional dusting of ink cartridges, is also important. However, some modern techniques allow self-cleaning through a brief reverse flow of air. Pulse sensing technology differentiates the pressure between the clean and dirty sides of the filter. The dust collector must produce 50 feet of air per minute through the enclosure. The production of dust or hazardous materials may even require rates of up to 100 FPM.

Whether you need to remove abrasive material from the inside of the tank car or from smaller gaps or containers, your plan should include vacuum recovery. Blasting medium recovery systems should be carefully analyzed, as an efficient recovery system is essential to minimize cleanup time and overall project costs. Efficient capture of the media for delivery to the recovery point and reliable transport of the media to cleaner areas are essential for normal performance.

Manufacturers and distributors of these systems typically offer a variety of recovery solutions for all or part of the floor space installation. With no moving parts, pneumatic recovery systems work well with lightweight media such as agriculture, plastics, glass beads, and alumina. Mechanical flooring reduces procurement and installation costs and utilizes pneumatic power. It also has trapezoidal steel blades to provide power.

The spiral bottom plate is generally used for steel sand and steel shot. Although they are more expensive and require more digging, they are best at moving the heaviest abrasives.

The cleaning system requires regular shut down for cleaning, which is very suitable for infrequent or irregular blasting needs. These floors use swing technology to move abrasive and dust to cross plates or screw conveyors.

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How does sandblasting room complete the rust removal

How does sandblasting room complete the rust removal

The main feature of the sandblasting room is that the operator is indoors during the blasting process. The protective clothing and helmet can prevent the operator from being impacted by abrasives, and the ventilation device provides fresh air to the operator through the helmet.

The blasting room is mainly used for large parts or using automatic blasting equipment to process very expensive parts. The nozzle manipulator installed in the sandblasting room can automatically sandblast the surface of the parts, and the hard-to-reach areas of automatic sandblasting can be completed by manual sandblasting. This not only maintains flexibility, but also reduces the requirements for the number of sandblasting operators.

The abrasive transportation method is another highlight of the equipment design. In addition to the well-known flat conveyor floor that requires a small installation depth, QGMA has extremely rich experience in screw conveyors and automatic scraper abrasive conveying technology.

How does sandblasting room complete the rust removal 1

The process of QGMA sandblasting room processing products is very simple. It is to build a room with rubber fixed inside. The shot material below can be recycled. There is a sandblasting machine outside. The internal operator uses the sandblasting machine to hit the sand at high speed on the workpiece. The surface, forming a certain degree of roughness, thereby improving coating adhesion and extending the service life of the workpiece! The sandblasting process is roughly divided into 5 steps to control: pre-control, abrasive control, tool control, condition control and quality control. Let me talk about the details of various controls.

  • Early control

Before sandblasting, check the surface of the workpiece carefully, remove welding slag, splashes and other attachments, and clean the surface grease and soluble dirt. Sandblasting can only be carried out under the premise of cleaning the surface of the workpiece.

  • Tool control

When the sandblasting machine is in operation, the air pressure of the air compressor is 6.0×105~6.5×105Pa, and the air pressure range is 0.5×105~1.0×105Pa. Generally, the air pressure of the sand bucket is 4.5×105~5.5×105Pa, not less than 4.0×105Pa. Before sandblasting, check whether the pressure vessel manufacturer holds the production license issued by the relevant department, whether the protective tools worn by the sandblaster, the safety belt (rope) and the oxygen supply device are safe and reliable, and whether the nozzle is worn out. The nozzle should be replaced when the diameter is increased by 25%.

How does sandblasting room complete the rust removal 2

  • Condition control

The compressed air used in the sandblasting room must be treated by a cooling device and an oil-water separator to ensure dryness and oil-free; the oil-water separator must be cleaned regularly. The distance between the nozzle and the surface of the base steel should be 100-300mm, and the non-sand-blasting parts should be shielded and protected before sand-blasting. The angle between the spray direction and the surface normal of the base steel is preferably 15°-30°.

After sandblasting and rust removal, before proceeding to the next process, in case of rain or other conditions that cause the surface of the base steel to be wet, after the environment has reached the construction conditions, use dry compressed air to dry the surface moisture before the construction, if necessary Sandblasting, do not reduce the abrasive requirements, so as not to reduce the roughness.

When the blasting room is working, the nozzle of the blasting machine should not stay somewhere for a long time. Sporadic operations should be avoided in the blasting operation, but the spray area should not be too large at one time. The time between the painting or thermal spraying process and the surface pretreatment process should be considered Interval requirements. Use manual or power tools to remove rust on the parts that cannot be sprayed by the spray gun.

  • Abrasive control

The sand used for rust removal in the sandblasting room must be hard, angular, dry, free of dirt and other impurities; quartz sand is better, coarse river sand is also acceptable; at the same time, the sand transportation conditions, unit price, and recovery capacity should be considered Factors such as: sand size is 0.5~1.5mm, it must be dried before screening, stored in a shed, indoors, sieve size: coarse sieve 40~48 holes/cm2 (particle size 1.2 mm), fine sieve 372~476 holes/cm2 (particle size 0.3mm).

After the rust removal plan is determined, the abrasive can be river sand, quartz sand or a mixture of the two. In the consolidation of Gangnan Reservoir, after pre-spraying comparison, the rust removal effect of mixing quartz sand and river sand at a ratio of 1:1 is the best.

How does sandblasting room complete the rust removal 3

  • Quality Control

After the sandblasting room is completed, the sandblasting and rust removal parts should be thoroughly inspected first, and then the cleanliness and roughness of the surface of the base steel should be inspected. The focus should be on the parts that are not easy to spray, and the requirements for rust removal by hand or power tools can be appropriately reduced. When inspecting the cleanliness and roughness of the surface of the base steel, firstly, it is strictly forbidden to touch with hands; secondly, it should be carried out under good scattered sunlight or artificial lighting conditions with equivalent illuminance to avoid missed inspection.


Sandblasting room with trolley for Australian customer

sandblasting room with trolley for Australian customer

Last month QGMA Machinery has a set of sandblasting room with trolley delivery to Australia. The sandblasting room floor recycle system is use the full automatic scraper recycle type. The trolley can load 15t, can make the sandblasting work more easy.

QGMA Machinery sandblasting room design is based on the advanced technical from foreign, we develop and design the environmental sandblasting room by ourselves. QGMA Machinery can according to customers workpieces character and requirements to design and made.

The sandblasting room all the sandblasting progress are in the sandblasting chamber, the main cleaning workpieces are large or expensive parts. So every parts of the sandblasting room need to specially design by our engineering team.

The sandblasting room composed with sandblasting chamber, sandblasting machine, recycle system, light system, dust collector system and electric control system.

The sandblasting chamber main advantage

  1. QGMA Machinery sandblasting room adopt to noise reduction sandwich board with a total thickness of 50mm.
  2. Each sandwich panel (2 meters) has a strong frame made of square tubes. Ensure that they will not deform during transportation and installation. The polished and sprayed square tube is sufficient to resist corrosion in the natural environment.
  3. The blast room wall inner is a heavy-duty wear-resistant rubber plate. The service life can reach more than 7 years when the blast chamber system is working 8 hours before 6 days a week. The rubber wire also has a noise reduction effect.
  4. The cargo door is equipped with wear-resistant rubber (up to 5mm). A dedicated sealing system prevents the loss of wear materials and makes closing the door effortless.

sandblasting room with trolley for Australian customer 2

The sandblasting machine main advantage

  1. The blast pot adopt volume 500L blast pot which ensures no need abrasive supplement with in 2 hrs during blast processing. Blast pot hydrostatically tested to operate at a pressure of 8 Bar (each blasting tank have their own certificates in accordance with GB 150.1-150.4-2011 and the only product coding).
  2. Blasting system adopt the most advanced venturi blast nozzle. for the venturi nozzle, a new combination of aluminum and polyurethane adds proven advantages in weight balance, strength and shock absorbent features not found in metal cased nozzles. The long venture design will maximize production requirements as well as give added abrasive impact when needed for tough, hard to clean surfaces.

sandblasting room with trolley for Australian customer 3

The sandblasting room abrasive recycle system

  1. The abrasive recycle system for blasting room have 4 parts: floor recovery, bucket elevator and separator.
  2. The sandblasting room recycle system on floor including manual, semi-automatic and automatic type to recycle the abrasive on the floor.
  3. Sandblast room recovery system use floor recovery system to reclaim the used blasting media and contaminants into the bucket elevator and then into the air wash cleaner system, and then the cleaned abrasive get into the storage hopper to recycle, the residual will get our of the recycle system from the separator.

The sandblasting room light system

QGMA Machinery light fixtures use high efficency LED lamps, which is enable maximum utilization of the luminosity. The fastening system allows easy removal for maintenance.

The sandblasting room dust collector system

  1. 2-level dust collector: settling chamber and cartridge filters. Cleaning efficiency is up to 99.5%.
  2. Filter material from Donaldson, effective filtration area of each filter is up to 15 ㎡.
  3. Air shock valve with timing device can clean filters regularly.
  4. The cartridge dust collector is an economical choice because it requires minimal maintenance: only periodic cartridge replacement is necessary.
  5. Cartridge replacement is performed outside the dust collector and requires no tools. This eliminates the need to work within a confined space and allows the worker to access the cartridge without getting dirty.

All the sandblasting machine, trolley, railing and other parts have the warning marks.

sandblasting room with trolley for Australian customer 1

Automatic reclaim sandblasting room for egyptian customer 2

Automatic reclaim sandblasting room for egyptian customer

QGMA Machinery has imported three sets of fully automatic reclaim sandblasting room to Egypt.  The sandblasting room size is 9m long, 6m wide and 4m high with scraper full automatic reclaim system. The scraper is a new type of recycled floor that uses pneumatic power and a steel frame trapezoidal arrangement to move the blasting medium. This scraper floor system does away the problem of jamming of metallic vanes. The scraper is formed by a natural rubber baffle facing the steel comb. Then, this component is connected with other components to form a corridor with the same length as the explosion-proof room..

Introduction of QGMA Machinery sandblasting room

The upper part of the scraper conveyor is a steel grille pedal (operator stands for use), which protects large objects from entering the scraper slot to damage the conveyor, and has good visual effects, easy to disassemble, and easy to repair the polyurethane scraper , Thereby reducing the failure rate.

The pneumatic device of the scraper conveyor is equipped with an induction detection device, which can detect the working status of the scraper reciprocating cycle. In the event of damage to the cylinder or failure of the compressed air circuit, as well as non-human failures in energy supply such as sudden reduction of compressed air pressure, the signal can be promptly fed back to the PLC for processing, and an alarm will be used to alert the operator to avoid continued sandblasting The entire conveying system is blocked by projectiles to ensure the safe operation of the equipment.

Automatic reclaim sandblasting room for egyptian customer 2

Sandblasting room composition

The scraper-type sandblasting room is a large-scale sandblasting room. The sandblasting (shot) room is composed of six major systems: workpiece handling system, sandblasting (shot) system, abrasive recycling system, abrasive sorting and recycling system, dust removal system and lighting system.

Scraper conveying projectiles has the advantages of high efficiency, energy saving, and low failure rate. The key is that compared with large bin-type screw mechanical recycling, it can greatly reduce the height of the foundation and reduce the cost of civil construction.

Scraper type sandblasting room working principle

The abrasive is ejected from the blast gun and falls on the load-bearing grating floor of the blasting room. The longitudinal pulsating scraper pushes the abrasive, debris and dust into the screw conveyor, and the screw conveyor transports them to the bucket elevator After passing through the separator, the good abrasive re-enters the sandblasting machine, while the dust and debris will automatically fall into the dust collecting cylinder.

The scraper blasting room system can run any kind of abrasive (swinging bed shot blasting machine, inclined drum shot blasting machine).

Features of sandblasting room:

  • The scraper-type sandblasting room can run any kind of abrasive and has a wide range of applications.
  • The scraper blasting room consumes low power and saves energy.
  • The blasting room is easy to operate, install and maintain.
  • The blasting room is solid as a whole and has a long service life.
  • The blasting room is easy to expand.
  • The blasting room has low noise.
  • The shallow pit design of the scraper sandblasting room saves civil construction costs.

Automatic reclaim sandblasting room for egyptian customer 1


What is the difference between sand and shot blasting?

Many customers inquire about QGMA Machinery for the difference between shot blasting machine and sandblasting machine. Here, QGMA Machinery engineer will briefly explain the principle and difference between them. Hope to help all customers.

Principle of shot blasting machine and sand blasting machine

Shot blasting machine

Shot blasting machine is use the high-speed rotating impeller to throw the steel of iron shot to hit the workpiece surface with high-speed and remove the oxide scale on the surface of workpiece. The steel or iron shot hit on the surface at high-speed causing the lattice distortion and deformation of the surface of the workpiece, which increase the surface hardness. It is the method of cleaning the surface of the workpiece. Shot blasting machine is often used to clean the surface of casting or strengthen the surface of the workpiece.

Shot blasting machine is used for clean some regular shaped workpieces. Put several blast wheels around the workpieces. It not only with high efficiency but also with low pollution.

Shot blasting and sand blasting, what is the difference 3

 Sand blasting machine

Sandblasting machine adopt to compressed air as the power to form a high-speed injection beam to spray the workpiece surface, which need to clean. To make the mechanical properties of the outer surface of the workpiece surface are changed. Although there are many type of sandblasting machine, but the ultimate goal is to improve the fatigue resistance of the workpiece, increase the adhesion between it and the coating, prolong the durability of the coating film, and also benefit the leveling and decoration of the coating. To remove the impurities, variegated color and oxide layer on the surface, and also make the surface of the medium rough, eliminate the residual stress of the workpiece and improve the surface hardness of the substrate.

Shot blasting and sand blasting, what is the difference 1

Process is different

Shot blasting and sand blasting can both clean and decontaminate the workpiece. The purpose is to prepare for the next process, that is to ensure the roughness requirements of the next process and some are to achieve surface consistency. The shot blasting have strengthening effect, sandblasting is not obvious. Generally, shot blasting use steel shot and sand blasting use quartz sand.

  1. Shot blasting and sand blasting are both surface treatments, but it does not mean that only castings can use the shot blasting process
  2. The main function of sandblasting is to remove rust and oxide scale on the surface, such as parts after heat treatment and shot blasting has more functions : not only removes rust and oxide scale, but also improves surface roughness and removes parts machining burrs to eliminate internal stress of parts, reduce deformation of parts after heat treatment and improve surface wear resistance and pressure capacity of parts
  3. There are many processes used for sand blasting, such as: castings, forgings, surface treatment of parts after machining, parts after heat treatment etc.
  4. Sand blasting is mainly manual operation, while shot blasting is mostly automated and semi-automated.
  5. The steel shots and iron shots used in shot blasting are not actually shots in the true sense. They are  steel wires or steel rods. After use a period of time it will like the shots. The sandblasting sand  it is just river sand, which is no different from that used for construction, except that the sand blasting is screened, contains less mud, and has a particle size specification. Of course, some industries are also different. For example, the shipbuilding industry uses real steel shots for shot blasting, while sandblasting uses metal ore (not river sand-quartz sand).

Shot blasting and sand blasting media

Shot blasting used the abrasive are generally spherical particles with no edges and corners. Such as steel shots, steel grits, steel wire cut, etc.

Sand refers to sand grains with edges and corners, such as brown corundum, white corundum, river sand, etc.

Shot blasting and sand blasting, what is the difference 2

Shot blasting  is a method of centrifugal force generated when the shot material is rotated at a high speed to impact the surface of the material to achieve removal and a certain roughness.

Sand blasting  uses compressed air as the power to spray sand or steel shots onto the surface of the material to achieve removal and certain roughness.

The main application scope of shot blasting machine is: applicable product industry: automobile, aerospace, computer, communication, home appliances and other 3C industries.

The main scope of application of the sandblasting machine is: applicable product materials: all kinds of rubber (including silica gel), injection molded parts, magnesium alloy, aluminum alloy, zinc alloy and other materials.

Through the above comparison, you can know their differences, so you will have a choice when choosing, mainly based on your actual situation.

What is the difference between cartridge filter and bag filter 1

What is the difference between cartridge filter and bag filter?

The difference between filter material and principle

  1. The hard filter material of the filter cartridge or filter bag is folded and arranged to form a cylinder, without skeleton, short, large spacing between the cylinders, thorough dust removal, and no secondary pollution.
  2. The cloth bag is sewn into a filter bag with a soft filter material, which is set on a skeleton welded by steel bars (commonly known as a dragon skeleton). The filter bag is densely clothed. The type of filter material is long polyester fiber and the post-processing material is mostly single layer. Ordinary industrial polyester cloth.
  3. The principle of filtration. The principle of surface filtration: the principle of deep filtration of the filter cartridge dust collector without going deep into the filter material. The dust of the bag filter goes deep into the filter material, and the dust layer is established on the outer surface of the filter material to maintain the dust removal efficiency.

What is the difference between cartridge filter and bag filter 2

Respective advantages and disadvantages 

  1. The advantages of cartridge type dust collector:

Three new: new filter material (waterproof, moisture-proof, wear-resistant and anticorrosive), new structure (hard filter material folding arrangement, no steel frame, no filter material wear phenomenon), new theory (surface filter instead of deep filter dust, no more penetration and filtration Inside)

1) The dust removal efficiency of the surface filter of the cartridge type dust collector is much higher than that of the old type dust collector, which greatly reduces the emission of harmful substances. The air purification index has reached the world advanced level, and completely changed the backwardness of the old type dust collector. status.

2) The cartridge type dust collector has no filter material wear and tear, and there are no moving parts on its body. It can be used for a long time without maintenance (even if the filter cartridge is removed and replaced), it avoids the trouble of constantly changing the filter material of the old type dust collector. Save money, time, effort and no secondary pollution.

3) The volume and weight of the cartridge type dust collector are far smaller than the old type dust collectors of the same specification, which saves civil construction space and civil construction load and saves significant capital construction investment.

4) The cartridge filter has low resistance, low consumption of compressed air and no maintenance workload. Compared with all kinds of old-style dust collectors, it saves energy and saves more than 30% of capital. No enterprise can ignore the significant economic benefits that this energy-saving effect brings to the enterprise.

What is the difference between cartridge filter and bag filter 3

  1. Advantages of bag filter:

 1) It has the characteristics of simple operation, continuous dust removal, stable resistance, high filtration speed, no internal moving parts, and simple design. It is a high-efficiency bag filter.

2) The dust removal efficiency is high, and it can collect dust above 0.1UM, so that the dust-containing gas can be purified to 15mg/m3 or less.

3) Less ancillary equipment, less investment, and lower technical requirements than electric precipitators.

4) It can collect dust that is difficult to recover by electrostatic precipitator, and to a certain extent can collect nitrate, sulfide and other compounds.

5) Good adaptability to load changes, especially suitable for capturing fine and dry dust, and the collected dry dust is easy to process and recycle.

6) The bag filter is safer when collecting explosion hazard or dusty gas with sparks.

  1. Disadvantages of bag filter:

 1) For different types of gases, the corresponding types of cloth bags should be selected, and the cloth bags need to be replaced frequently, which consumes a lot of money.

2) When collecting dusty gas with high humidity, moisturizing measures should be taken to avoid “bagging” due to condensation. Therefore, the bag filter has certain requirements for the humidity of the gas.

3) The resistance is large, and the general pressure loss is 1000-1500PA.

4) For high temperature gas, cooling measures must be adopted.

5) When receiving dusty gas with a large particle diameter, the cloth bag is easier to wear

Container sandblasting room for aluminum part 1

Container sandblasting room for aluminum part

Container sandblasting room, or container sandblasting booth, is uses a standard 20ft or 40ft shipping container for room body. The abrasive recovery system, air wash, blast pot and control circuitry are located in this room. The abrasive recovery system consists of a screw conveyor into which the operator sweeps the used abrasive into. A bucket elevator then lifts the abrasive into an air wash system where the abrasive is cleaned, removing any contaminates and dust. The abrasive is returned back into the blast pot for re-use.

Container sandblasting room for aluminum part 2

QGMA has rich experience for design all kinds of wheel blast or air blast equipment, let me introduce container sandblasting room for you:

Container sandblasting room can solve the problem of limited factory space or the use of temporary workstations. Our container blast room can provide an immediate and economical solution. The flexibility of this design means that the client can specify the type of recovery system, dust collection system and size of the unit to suit his needs. Our container blasting rooms are fully weather proofed and can be positioned indoors or outside your factory. Available in a standard 6m or 12m long shipping container, it offers your company a simple, easily transportable solution. Connect to your compressed air and electrical supply and you are all set for sand blasting.

What’s more, we can also provide for movable sandblasting room or portable sandblasting room. The main feature of this type room is make the abrasive recovery system, dust collector, sandblasting machine together, it can be transported to the site by flatbed truck. The installation time is less than 2 hours, which is the best equipment for field-flow operation.

Container sandblasting room for aluminum part 3

MORE THAN SURFACE is QGMA spirit, we are specialized in the surface treatment, but we care more: long serve time, safety, energy-saving, environment-friendly. If you want to more about our catenary type container sandblasting room, please visit our website or ask me.