Development of Refractory Material from Water Quenched Granulated Ferrochromium Slag

High temperature refractory materials of refractoriness above 1665°C having refractory phases such as forsterite (Mg₂SiO₄), periclase (MgO) and spinel can be developed from the water granulated spongy ferrochromium slag granules (90% particle) of size below 3100 micron by MgO enrichment. MgO enrichment in ferrochrome slag can be achieved by a method comprises of grinding of granulated ferrochrome slag in presence of magnesite raw material followed by compaction and sintering. The ratio of MgO/SiO₂ > 2.2 and MgO/(Al₂O₃ + Cr₂O₃) > 1.71 in the final composition ensures the refractoriness above 1665°C.