Blast Rooms and Blasting Booths Information
Blasting Rooms and Blasting Booths
Blasting rooms and blasting booths are designed to contain the abrasive blasting process used with large workpieces. They are self-contained enclosures that have internal lighting and can accommodate both the workpiece and the operator. Often, the operator holds the blasting nozzle on the end of a lance. The blasted workpiece or part rests upon open-grid flooring that allows used abrasives to drop through for recycling.
Blasting Rooms and Blasting Booth Specifications
Product specifications for blasting rooms and blasting booths include length, width and height. Workpiece loading is also important to consider. Choices include offhand or handheld, conveyor (belt, roller, or overhead monorail), table (gantry or rotary), tumbler or tumbler belt, and spinner hanger or turnstile.
Blasting Rooms and Blasting Booth Components
Blasting rooms and blasting booths are often equipped with guns or lances, blast wheels, cutting heads, or pressure generators.
- Guns or lances direct a stream of abrasives and carrier fluid or water through a nozzle.
- Blast wheels propel and direct a wide stream of abrasives and a carrier, typically water or air, at the workpiece.
- Cutting heads also direct a stream of water or abrasives and a carrier.
- Pressure generators are used to increase the pressure of this carrier. Plunger-type intensifier pumps are used to generate high-pressure water for water jet cutting, water abrasive blasting, and non-abrasive pressure washing or rinsing. Crankshaft-driven plunger pumps are also used for pressure generation. They may be more efficient than intensifiers in terms of electrical energy costs, but at high pressures (>20,000 psi) the seals must be replaced periodically.
Some blasting rooms and blasting booths include abrasive injectors, hoppers or tanks, media separators or reclaimers, and dust collection and filtration systems. Abrasive injectors are designed to move abrasives from a storage vessel to a nozzle, gun, head, or wheel. The injection or metering system controls the amount of abrasive pushed into the air or water stream. Sometimes, the delivery system and the injection system are separate components. Hoppers or tanks are used for storing dry abrasive grains, blasting media, or abrasive-water slurry mixtures. Media separators and reclaimers are used in blast machines to remove undersized abrasives or media and blasting coarse waste (removed scale or stock in the form of swarf). Dust collection or filtration systems remove fine particle sizes of abrasives, media and blasting waste that would otherwise become suspended in the air.