磁化焙烧-磁选回收某褐铁矿中铁的试验研究  

Research on Recovery of Iron from Limonite by Magnetization Roasting and Magnetic Separation

作　　者：柳林[1] 王威[1] 刘红召[1] 曹耀华[1] 张博[1] Liu Lin;Wang Wei;Liu Hongzhao;Cao Yaohua;Zhang Bo(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, China National Engineering Research Center for Utilization of Industrial Minerals, Comprehensive Utilization Key Laboratory of Gold Resource in Henan Province, Key Laboratory of Evaluation and Multipurpose Utilization of Polymetallic Ore of Ministry of Land and Resources, Zhengzhou, Henan,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所国家非金属矿资源综合利用工程技术研究中心河南省黄金资源综合利用重点实验室国土资源部多金属矿评价与综合利用重点实验室

出　　处：《矿产综合利用》2019年第4期33-37,共5页Multipurpose Utilization of Mineral Resources

基　　金：河南省科技攻关项目(182102311075);国家自然科学基金项目(51404220);中国地质调查局地质调查项目(121201017000160907)资助

摘　　要：某褐铁矿原矿铁品位39.28%,其中褐铁矿矿物含量占73.86%,具有一定的回收价值。以焦煤为还原剂,采用磁化焙烧-磁选的工艺回收其中的铁,试验主要考察了磁化焙烧温度、时间、还原剂加入量、磨矿细度、磁场强度对铁精矿选别指标的影响。确定最佳工艺条件为:磁化焙烧温度800℃,焦煤加入量4%,焙烧时间40 min,焙烧样磨矿至-0.037 mm 90%,磁场强度设置192 KA/m进行磁选,最终可获得磁选精矿铁品位59.76%、铁回收率73.31%的良好指标。There is 39.28% iron in limonite ore and the mineral content of limonite is 73.86%, which can be recycled. With coking coal as reducing agent, the magnetization roasting-magnetic separation process was adopted to recycle iron from the limonite. According to this characteristic, the effects of roasting temperature, time, amount of reducing agent, grinding fineness and magnetic field intensity on ore dressing indexes were discussed. The test showed that, the optimum conditions were as follows: the ore was roasted at 800℃ for 40 minutes with coal consumption 4%, and then ground it to-0.037 mm 90%, with magnetic field intensity 192 KA/m. As the conditions, the indexes was obtained: the total iron grade of iron concentrate was 59.76% and the total iron recovery was 73.31%.

关 键 词：褐铁矿 磁化焙烧 磁选 

分 类 号：TD951[矿业工程—选矿]