Sandblasting
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Sandblasting is a process commonly used in industry to remove irregularities on the surface of many materials such as metal, casting, plastic and composite materials. In the sandblasting process, materials such as sand, steel balls, plastic balls, walnut shells or gravel are sprayed from a pressurized area at high speed with the help of a gun. The main purpose of this process is to clean the surfaces of the parts and to prepare for possible coating, painting, etc.
DUST AND SMOKE RELEASED DURING SANDBLASTING
Sandblasting operators live with dust due to the nature of the process being performed. Since it is a process that is constantly exposed to dust, the operators doing this job are well aware of the importance of reducing the density of dust in working environments.
The blast powder characteristic depends on the equipment used, the type of material blasted, and the coating you removed when blasting parts.
The particles released during the sandblasting application consist of the coating separated from the material blasted due to high pressure blasting, the sandblasted material and the material sprayed during blasting. The vast majority of the materials sprayed for sandblasting fall directly to the bottom of the sandblasting area, where it is large in size. However, the size of other particles ranges from 0.5 to 5.0 microns. Particles of 1 micron and less (submicron) are particularly dangerous for human health and can cause irreversible damage if inhaled. The irregular size, shape and coarse structure of the particles released during the sandblasting application make them highly abrasive. Care must be taken when designing systems for the collection of abrasive dust. Care should be taken when using hazardous materials or removing hazardous materials from the surface of the material during sandblasting. In the meantime, special measures may need to be taken.
Sandblasting is commonly carried out in closed shot blasting machines or special blasting rooms. All parts where sandblasting is done should have a very good dust collection system for both the health of the employees and the maintenance costs of the equipment used in your factory.
Dust and smoke released during the blasting application are highly corrosive and may have a fire and explosion risk depending on the sandblasted material. Bomaksan engineers make specific product selections for your sandblasting application. EX-PROOF filter units can be manufactured with ATEX certified equipment for applications with explosion risk, and customer-specific studies can be carried out on the measures to be taken against all kinds of fire and explosion risks.
In order to create an efficient and healthy working environment, it is necessary to remove and filter the smoke and dust caused by all these materials from the breathing air of the employees in a healthy and effective way. Factories that do not increase precautions for work accidents and occupational diseases, thanks to the increased awareness and awareness in recent years, both experience a shortage of qualified personnel and face lawsuits with serious consequences in the long term. Firms that take precautions against work accidents and occupational diseases at the highest level have increased productivity thanks to employee satisfaction as well as providing a sustainable production center.
WHAT SHOULD BE CONSIDERED WHEN DESIGNING THE SUCTION SYSTEM?
The main points to be considered while designing the ventilation system for the suction of dust and smoke released during the sandblasting application are as follows;
Corrosive dust resistant steel channels
Spiral clamped galvanized piping is not suitable for this application because the dust released during sandblasting is abrasive. Systems made with spiral clamped pipes are starting to cause problems in a short time.
Precautions Against Fire Risk
Depending on the type of sandblasted material, sandblasting dust and smoke have a risk of fire. In cases where this risk occurs, measures should be taken to ensure that the spark can reach the filter, and measures should be taken to minimize the damage in case of a possible fire.
Corrosive dust resistant steel channels
Spiral clamped galvanized piping is not suitable for this application because the dust released during sandblasting is abrasive. Systems made with spiral clamped pipes are starting to cause problems in a short time.
Precautions Against Fire Risk
Depending on the type of sandblasted material, sandblasting dust and smoke have a risk of fire. In cases where this risk occurs, measures should be taken to ensure that the spark can reach the filter, and measures should be taken to minimize the damage in case of a possible fire.
Precautions Against Explosion Risk
Depending on the type of sandblasted material, sandblasting dust and smoke have the risk of explosion. In cases where this risk occurs, precautions for sparking to the filter as well as measures to minimize the damage in the event of a possible explosion should be taken.
CHOOSING THE RIGHT FILTER UNIT
Dust collection systems used for the suction and filtration of dust and fumes during blasting are critical for the effective collection and filtration of submicron particles (less than 1 µm). ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) uses the Minimum Efficiency Rating Value (MERV) criterion to determine the filter efficiency and capacity of particles within a certain size range. Minimum MERV 15 filters should be used for the filtration of dust and smoke released during the grinding process. In the filtration of highly harmful particles such as Chromium (Stainless Steel), Copper and Manganese, a filter efficiency of MERV 16 and above is required.
Filter media (the area where dust and fumes are kept in the dust extraction unit) plays a critical role in the efficient filtering of fumes released during the grinding application. In processes where the filter media cannot be selected correctly, undesirable consequences such as frequent clogging of the filters, high electricity consumption, frequent pauses of the grinding process may occur. Therefore, high quality filter media must be used.
In addition to the filter media, a good Jet-Pulse dust collector should have a highly efficient cleaning system, easy maintenance and universal spare parts. Bomaksan brand filter units are superior to other brands thanks to these superior features.
Bon scream, Jet-Pulse Dust Collector in Turkey, jet-pulse cleaning system in the name of improving the efficiency of R & D work by grants from TUBITAK is the first and only domestic firms.
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