澳大利亚某赤铁矿石深度还原试验  

Deep Reduction on a Hematite Ore from Australia

作　　者：李艳军[1] 袁帅[1] 陈波[1] 周政[1] 王绍兴[1] 李运恒[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2014年第5期70-73,共4页Metal Mine

基　　金："十二五"国家科技支撑计划项目(编号:2012BAB14B02)

摘　　要：澳大利亚某铁矿石属高铁、易泥化、极细粒嵌布的赤铁矿石,传统选矿工艺难以获得理想的分选指标。为给该矿石的开发利用提供技术方案,以某洗精煤为还原剂,采用深度还原—弱磁选工艺对该矿石合理的深度还原工艺参数进行了研究。结果表明:还原温度和还原时间是影响该矿石深度还原效果的主要因素;在配煤过剩倍数为2.0、还原温度为1 250℃、还原时间为50 min、料层厚度为30 mm情况下的深度还原熟料,经磨矿(-200目含量约为80%)、1次弱磁选(磁场强度为107 kA/m),可获得全铁品位为78.13%、铁回收率为98.19%的金属铁粉。因此,深度还原—弱磁选工艺是该矿石开发利用的有效工艺。A hematite ore from Australia are characterized by high iron,sliming easily and fine disseminated,hitherto regarded as being difficult to obtain qualified iron concentrate with conventional mineral processing process.Deep reduction-magnetic separation technology on the ore was carried out using coal as reductant in order to provide technical mechanisms for exploitation and utilization of the ore.The results showed that reduction temperature and time were the main factors that influence the deep reduction efficiency; iron powder with Fe content of 78.13％ and recovery of 98.19％ were obtained via dealing clinker,which are from deep reduction with excess multiple in coal blending of 2.0,at reduction temperature of 1 250 ℃ for 50 min,bed thickness of 30 mm,with grinding（about 80％ passing 200 mesh） and one low intensity magnetic separation （107 kA/m） process.The process of deep reduction-low intensity magnetic separation technology is an effective way in exploitation of the ore.

关 键 词：极细粒赤铁矿 深度还原 金属化率 金属铁粉 

分 类 号：TD925.7[矿业工程—选矿]