Heating-up Reduction and High Temperature Properties of High Alumina Sintered Ores

Abstract

To investigate the effect of Al₂O₃ on the reduction and high temperature properties of sintered ores, the heating-up reduction of sintered ores varying the Al₂O₃ content are carried out. The early softening, the increase of pressure drop, and meltdown temperature were observed at lower temperature with increase of Al₂O₃ content. From the simultaneous X ray observation of reduction process and EPMA and SEM analysis of quenched samples, a relatively large amount of Wüstite-Gehlenite eutectic phase was observed in the early stage of reduction process at high Al₂O₃ content sintered ores. Based on these results, it is concluded that Al₂O₃ rich molten phase was produced at the relatively low temperature with the increase of Al₂O₃ content.