A large number of steel shot are accelerated by the centrifugal force of the shot blasting machine and impact  the ground that needs to be treated. After the steel abrasive hits the surface,  rebound and the negative pressure from the matching vacuum cleaner will help the steel abrasives to form a cycle inside the machine . Dust and contaminants are removed by an air wash separator and are removed to a dedicated   dust collector. This makes the process almost dust-free in operation.