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Our product is called coal measures calcined kaolin which isn"t normal kaolin. Its raw material is gangue which is mined from underground 200m, after being calcined at different temperature(9500--13000) , fell to pieces, and grinded, it becomes our calcined kaolin.
Usage: fireproof materials
SiO2:Min.53% Al2O3:Min.45% Fe2O3+TiO2:Max.0.7% PH:6--8