Choose steel sand with moderate hardness and excellent resilience, which can reach every place of the cleaning room and reduce the treatment time. The function of Dalian cast steel shot and steel sand is to clean the workpiece. The correct selection of steel shot should pay attention to the following problems: the determination of steel sand mainly depends on the type of workpiece you want, and aluminum shot or stainless steel sand is generally used for non-ferrous metals; Ordinary steel weldments, castings, steel, etc. use steel sand; The larger the diameter of steel sand, the higher the surface roughness after cleaning, but the work efficiency is also very high;