内配残煤对某低品位铁矿石小球团还原—弱磁选影响研究  

Effect of Inner Residual-coal on Reduction and Low Intensity Magnetic Separation of Low Grade Iron Ore Mini-Pellets

作　　者：黄柱成[1] 黄遥[1] 姚圣杰[1] Huang Zhucheng Huang Yao Yao Shengjie(School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《金属矿山》2016年第12期43-47,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51234008)

摘　　要：将回转窑还原后的残煤和原煤按比例混合作为内配煤,研究了某低品位铁矿石内配残煤对其还原—弱磁选的影响。结果表明:低品位铁矿石内配残煤不利于铁氧化物的快速还原和铁晶粒长大,焙烧小球金属化率有所降低,但能降低内配煤焙烧小球的孔隙率,提高小球的抗压强度;残煤配比为50%时,磨矿—弱磁选指标较好。Effect of residual-coal proportion on reduction-low intensity magnetic separation of low grade iron ore was studied,using mixture of residual-coal which had been reacted in rotary kiln and the raw coal in a property ratio as inner coal.The results show that the inner residual-coal in low grade iron ore pellets was not conducive to rapid reduction of iron oxide and growing up of iron grain,and metallization rate of mini-pellets decreased. But the strength of pellets was improved due to decrease of roasting pellets porosity. The grinding-low intensity magnetic separation index were preferable as the proportion of the residual-coal in inner coal was 50%.

关 键 词：低品位铁矿石 残煤 球团 还原—弱磁选 

分 类 号：TF046[冶金工程—冶金物理化学]