Product specification of blended samples: Chemical composition: SiO2 50% -60% Al2O3 25% -35% Fe2O3 max. 1% TiO2 max. 0.5% CaO max. 2% MgO max. 1% K2O max. 1% Na2O max. 1% Physical appearance: Whiteness 70-80% . ( dry sample) Water content 30-35% .. Processing : Extracting -> Stockpiling -> Loading