Blastrac closed circuit media blasting machines throw a large amount of steel abrasive media by centrifugal force at the surface. After the steel abrasive hits the surface, the shot blaster recycles the media. Dust and contaminants are removed by an air wash separator and are removed to a dedicated Blastrac dust collector. This makes the process almost dust-free in operation.
Blasting with steel shot is the most environmentally friendly abrasive blasting method there is, because there is no use of chemical products and no waste of valuable drinking water. The video below shows the shot blasting process perfectly.