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How To Create An Abrasive Air Sandblasting Room?
Nov 03, 2017

Sandblasting Room already exists when people can polish objects with quartz and other materials. The idea is simple, with the advent of air compressors, the blasting industry was born.

Sandblasting is the heart of any modern blasting system. In order to get a controlled and clean environment and to recover the abrasive efficiently, it is necessary to surround the working environment.

The design criteria for a properly sized sandblasted system include the maximum workpiece size, the maximum weight of the workpiece, the material handling, the number of hours sandblasted per day, and the basic material of the workpiece. Each element needs to be considered in order to finalize the construction of the sandblasting room.

The largest workpiece size will determine the size of sandblasting room. The width of the room is determined by adding four to five steps on each side of the workpiece. This space is necessary for blasting workers to blast from different angles.

The height of the sandblasting room is also determined by the height of the workpiece, but the material handling part must also be considered. For example, if a working vehicle in orbit is material-handling, the height of the working vehicle must be taken into account to ensure that there is adequate clearance in the roof of the sand-blasting house. Similarly, a 4 to 5-foot empty area or up to 7 feet is necessary if the operator is going to walk on top of the work-piece (as in a train car) while blasting.

The length of the Sandblasting Room is four to five additional spaces at each end of the work piece for operator use.

Sandblasting room ventilation through three different air flow design to complete. The three ways are "under-ventilation", "end-to-center ventilation" and "staggered ventilation". Ventilation speed in each room is determined by the abrasive and method used in the sandblasting room

The most common and economical method of ventilation is "staggered ventilation." Basically, calculating the size of the precipitator is determined by this formula: Room width x height x cross section airflow velocity (FPM) = cubic feet. Note: The cross-sectional airflow velocity is typically 50 FPM grit abrasive and 60 FPM non-ferrous mineral abrasive. For example, for a 16 × 16 × 60-foot grit chamber that uses grit abrasive, calculate the following: 16 × 16 feet × 50 feet = 12800 cubic feet You need a room with an air flow of 50 FPM.

The recovery system adds extra air dust collection devices in the range of 500 to 1200 cubic feet; thus, the resulting dust collector will be (12,800 cubic feet + 500 cubic feet) - totaling 13,300 cubic feet.

When choosing the right sandblasting room, it is important to look at the entire range of components when blasting.

For example, a workshop blasting job may see one type of job going on for some time, and another type of prefabricated aluminum part working for another time. In this type of application, you will want to choose one type of abrasive material for both types of base material: steel (iron) and aluminum (colored) such as garnet, alumina, and so on.

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