bauxite powder Rotary Kiln Calcined Bauxite Powders:100mesh, 200mesh,325mesh Size:0-1,1-3,3-5mm Certificates: ISO 9 high quality bauxite powder Specifications:1) Al2O3≥80%2) Fe2O3≤1.5%3) SiO2≤3.0%3) K2O+Na2O≤0.45%4) B.D.≥3.1g/cm35) Water Absorption≤1.5% high quality bauxite powder