Silica raw materials have crystalline silica, cemented quartzite and vein quartz, etc., collectively known as silica. Silica for refractory materials, SiO content should be greater than 96%, and should be high purity, high density, suitable quartz crystal size, less impurities and uniform distribution. Crystalline silica is made up of quartz particles in close contact with each other. Quartz has large grain size and high hardness, so it is difficult to transform when heated. Most of silica belongs to such minerals in our country, wide

1. in the neoprene rubber magnesium oxide and zinc oxide can be used as vulcanizing agent;2. in the rubber formula magnesium oxide can be used as acid absorbent also called stabilizer to improve the curing speed;3. it can also increase the bonding performance with the metal skeleton.4. in styrene butadiene rubber, brominated butyl rubber, neoprene rubber can be used as anti-coke agent to improve the anti-coke performance;5. it can also be used as a filler, increase heat and heat conductivity;6.