Quartz sand

　　1. Character and structure

　　Quartz sand is hard、wearproof and steady chemical property.Its main composition is SiO2.It，s milky-white or colourless translucent.The hardness is 7.Its density is about 2.65g/cm3.Quartz stone and quartz sand made by us can be divided into quartz sand、 refined quartz sand and specially made refined quartz sand.

　　2. Main standards

name	standards （mesh）	Fire-resistant （℃）	homogenization （%）	Content ofSiO2 (not less than %)	Content of Fe2O3 (lessthan %)	Content of powder(less than%)）
Refined quartz	4-6	1750	90	99.5	0.02	0.2
--	6-10	1750	90	99.5	0.02	0.2
--	10-20	1750	90	99.5	0.03	0.2
--	20-40	1750	90	98.9	0.03	0.2
--	40-70	1750	90	98.8	0.04	0.3
--	70-140	1750	90	98.9	0.04	0.3
--	100-200	1750	90	98.5	0.04	0.3
--	270	1750	90	98.9	0.04	0.3
--	325	1750	90	98.7	0.04	0.3

　　3. Main use

　　Quartz sand is an important material. It，s widely used in glass、casting、pottery、fireproof material、 construction、metallurgy and chemical、industry、electronics、paint and so on.