Sintering with High-alumina Iron Ores-A Review
Worldwide demand for iron ore has increased drastically,driven by the massive growth of steel production in China.Hence,many steel mills in the Asia-Pacific region,where sinter usually constitutes a significant proportion of the blast furnace feed,will have to use low-cost iron ores containing high alumina content in their sinter blends for either economic reasons,or due to a shortage of high-grade iron ores.While its cause and severity are still the subject of considerable debate,the adverse impacts of alumina on sinter quality and the sintering process are clear.In general,as the alumina content of iron ores increases,both the sintering performance and the resultant sinter quality deteriorate.It is therefore imperative for steel producers to develop strategies to maintain sinter quality and sintering performance while using high-alumina iron ores in their sinter blends.While the effects of alumina are very complex and the mechanisms responsible are not yet fully understood,extensive research suggests the effects should be associated with changes in the mineralogical texture and physical structure of sinter,which are largely dependent on the behaviour of the primary melts formed during the sintering process.Measures which can neutralize,dilute and localize the effects of alumina on the sinter texture and promote and control the physicochemical properties of primary sinter melts will therefore be beneficial.In this paper,based on our understanding of the role of alumina and its effects on sinter quality and the sintering process,various methods to counteract the adverse impacts of alumina are discussed.
High-alumina iron ores sinter melt sinter structure sintering performance,sinter quality
LU Liming HOLMES Ralph J
CSIRO Process Science and Engineering,Queensland Centre for Advanced Technologies,Technology Court,Pullenvale,Qld.4069,Australia
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-9
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）