Shot blasting equipment is first used in the foundry industry to remove sand and oxide scale from the surface of steel and iron castings. Almost all steel castings, gray castings, malleable castings, ductile iron castings, etc. need to be shot blasted. This is not only to remove oxide scale and sand from the surface of castings, but also an indispensable preparation process before the quality inspection of castings. For example, the casing of a large gas turbine must be strictly shot blasted before non-destructive testing to ensure the reliability of the testing results.