DUST-CONTROL TECHNOLOGY FOR ASPHALT PAVEMENT . that used to determine compliance with the general-industry PEL for silica, and the latter is the only methodology currently available to OSHA compliance personnel [OSHA 2008]. Grinding Steel without a Mask : metalworking Grinding Steel without a Mask (self.metalworking) submitted 4 years ago by metalsrus Yesterday night I spent about two or so hours grinding down steel plates into, well, smaller steel plates as the supplier had provided incorrect sizes, and we needed they by that day to complete a project. Grinding Media - Milling Balls - Ceramic Grinding Media ... Grinding Media Grinding media are the means used to crush or grind material in a mill. It comes in different forms such as alumina oxide balls, ceramic cylinders, or soda lime glass. At Norstone Inc., we offer all types of medias used for grinding, deagglomeration, polishing, deburring, fillers, proppants, spacers, refractory beds and shot peening.    Read More