What is high grade silica sand used for? Silica sand is a new type of hard, wear-resistant and stable composite stone with silica as the main component, also called silica, mostly presented as transparent or translucent colourless, with a hardness level of 7 and a relative density of 2.65, with high refractory properties. Silica sand is formed after crushing and sand making, and is a very important industrial raw material. Due to its chemical stability, good piezoelectricity, high melting point and hardness, High quality silica sand is widely used in glass, chemicals, casting, metallurgy and ceramics after processing. How is silica sand processed? What kinds of equipment are needed? METHOD 1: Dry Silica Sand Beneficiation Technology Raw silica ore is coarsely crushed by jaw crusher → sorted by AMD large ore particle optical sorter → medium and fine crushing by cone crusher → screening by vibrating screen - sorted by AMD dry ore particle optical sorter → sand ma...