钒钛磁铁海砂矿还原过程有价元素变化规律的研究  

Study on the regulation mechanism of valuable elements in the reduction process of vanadium-titanium magnetite marine placer

作　　者：胡佩伟[1,2] 胡超 胡兵[3,4] 谢志诚 郑富强 刘臣 Hu Peiwei;Hu Chao;Hu Bing;Xie Zhicheng;Zheng Fuqiang;Liu Chen(College of Resources and Environment Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,Hubei,China;Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;National Engineering Research Center of Sintering and Pelletizing Equipment System,Changsha 410205,Hunan,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081 [3]中冶长天国际工程有限责任公司,湖南长沙410205 [4]国家烧结球团装备系统工程技术研究中心,湖南长沙410205

出　　处：《钢铁钒钛》2021年第5期10-17,共8页Iron Steel Vanadium Titanium

基　　金：湖南省青年基金项目(2019JJ51007);湖湘青年英才项目(2020RC3092)。

摘　　要：以印尼某钒钛磁铁海砂矿为研究对象,通过XRD分析探明其主要成分和物相组成,并在热力学分析基础上探讨了该矿的还原特性和有价元素变化规律。利用微波加热同时以生物质炭作为直接还原的还原剂对海砂矿进行还原-磨选试验,微波加热有利于强化海砂矿的还原过程。结果表明,在C/Fe为0.6,还原焙烧温度1 200℃下还原150 min,可获得金属化率为98.28%的还原产物;在矿浆浓度50%,磨矿时间为40 min,磁场强度为0.08 T的条件下,可获得铁品位为85.1%、铁回收率94.01%的精矿粉,以及TiO_(2)品位为28.95%,回收率为71.98%,V_(2)O_(5)品位为2.14%,回收率为56.82%的尾矿粉,有效实现了铁和钒钛的分离富集。In this paper,a marine placer from Indonesia is used as the testing material.Its chemical composition and mineral composition were analyzed by XRD,and the reduction characteristics and the regulation mechanism of the valuable elements of the ore are discussed on the basis of thermodynamics.The reduction and grinding experiments of marine placer were carried out by microwave heating with biochar as the reducing agent for direct reduction.Microwave heating is beneficial to strengthen the reduction process of marine placer.The results show that the reduction product with 98.28%metallization rate can be obtained with the C/Fe ratio of 0.6 and the reduction temperature of 1200℃for 150min.Under the conditions of 50%pulp concentration,40 min grinding time and 0.08 T magnetic field intensity,the refined powder with iron grade of 85.1%and iron recovery of 94.01%,tailings powder with TiO_(2) grade of 28.95%and recovery of 71.98%,V_(2)O_(5) grade of 2.14%and recovery of 56.82%can be obtained.The separation and enrichment of iron and vanadium-titanium are effectively realized.

关 键 词：钒钛磁铁海砂矿 直接还原-磨矿-磁选法 微波加热 生物质炭 铁 钛 钒 回收率 

分 类 号：TF823[冶金工程—有色金属冶金] TD92[矿业工程—选矿]