Huangshan ball mill is used for ultra-fine grinding of quartz, quartz powder (with quartz sand), also known 

as silicon powder. Quartz sand is a hard, wear-resistant, chemically stable silicate mineral,

Its main mineral composition is SiO2, the color of quartz sand is milky white, or colorless translucent, Mohs 

hardness 7, so the internal paste alumina lining brick, filled with alumina grinding ball, prevent equipment 

wear.