... sandH.S.Code : 6914900000 Fracturing Proppant is a kind of ceramic particle product, has the very high fracturing intensity, mainly used ... bauxite, coal and so on many kinds of materials, with ceramic sintering and into, is a natural quartz sand, glass ball ... increase oil and gas has good effect. Chemical composition(Weight %)Al2O3%>71SiO2%≤13TiO2%≤5Fe2O3%≤10 Others %≤1 By Compression Strength : 52 ...