Have a Blast

摘要

If you can make a particle out of it, you can use it for blast cleaning. Here particles of water (liquid droplets or solid ice), CO_2 (dry ice), wheat or rice hulls, plastic or glass beads, metal shot or salt grit, corn cob grit (Figure 1), silica sand or smelter slag, and other solids are entrained in high-velocity streams of liq-uids and gases, and shot at soiled surfaces. The solid particles must be clean and dry or else they may clog the dispensing apparatus, which feeds the blast nozzle—a common problem.