Density: Minimum of 62% Values and sizes: CHEMICAL COMPOSITION (on dry basis) Fe: 62% minimum Al2O3: 2.20%, greater than or equal to 3.0% rejection SiO2: 3.20%, greater than or equal to 7.0% rejection P: 0.04%, greater than or equal to 0.05% rejection S: 0.04%, greater than or equal to 0.09% rejection Fe: 2.40%, greater than or equal to 5% rejection K, Na, Pb, Zn, As, Ti: