Shanxi low iron 45 # flint calcined kaolin (factory outlets)

▲] [flint flint nature is a mixture of aluminum-containing silicate. The main chemical components of Al2O3 and SiO2 two oxides, impurities are mainly alkali oxides, alkaline earth and iron, titanium, and some organics. Various oxides are played fluxing action will reduce the refractoriness of raw materials. Therefore, flint impurity content, especially the lower Na2O + K2O content, the higher refractoriness. The Al2O3 / 3SiO2 ratio closer to the theoretical value (A / S = 0.85), indicating that the higher the purity of flint. A / S the big, the higher the flint refractoriness, the wider the range of sintering and fusion. Quality flint refractoriness up to 1750 ℃ ??or more. ▲ flint volume after calcination have stable, high strength and low water absorption rate and other characteristics. A measure of the degree of sintering flint indicators generally have a true specific gravity, bulk density, porosity, water absorption, firing shrinkage rate. Good degree of sintering flint water absorption is less than 5%, a bulk density greater than 2.5g / cm3. Origin] [flint mainly Shandong, Hebei, Shanxi, Henan, Anhui. [Flint] for the production of high-grade refractory use, manufacture of ceramics, aluminosilicate refractory fiber production and military.