... ' hardness 9.3 and 6% humidity in metallurgy, building material, chemical engineering, mines, and other industrial sectors such as ... dolerite, stack of rock, basalt, gypsum, plumbago, silicon carbide, heat insulating material, etc.Characteristics: 1. Output higher by 10%-20% than other ... same power supply, and grinding force of rollers to material driven by high-pressure springs increased by 800-1200kg. ...