HEATING-UP REDUCTION AND HIGH-TEMPERATURE PROPERTIES OF HIGH-ALUMINA SINTERED ORES

To investigate the effect. of Al2O3 on the reduction and high temperat ure properties of sintered ores, the heating-up reduction of sintered ores varying the Al2O3 content are carried out. The early softening, t he increase of pressure drop, and meltdown temperature were observed a t lower temperature with increase of Al2O3 content. From the simultane ous X ray observation of reduction process and EPMA and SEM analysis o f quenched samples, a relatively large amount of Wustite-Gehlenite eut ectic phase was observed in the early stage of reduction process at hi gh Al2O3 content sintered ores. Based on these results, it is conclude d that Al2O3 rich molten phase was produced at the relatively low temp erature with the increase of Al2O3 content.