... .It is used in the production of fused salt eletrorefining aluminium, corundum eramics, refractories and other alumina chemical products1. Main standardChemical ... Cu, V, Zr, Cr, Li, Pb, B, P, etc.ApplicationEletrorefining aluminium, corundum eramics, refractories and other alumina chemical products. 2. SpecificationNoItemUnitIndexOne gradeTwo ... .034Na2)/%≤0.500.605Loss in burning%1.01.0 Aluminium oxide