钒钛磁铁矿还原-磨选工艺分离铁钛试验  

Separation of iron and titanium by reduction grinding separation process of vanadium titanium magnetite

作　　者：罗林根 庞建明 李新[2] 宋耀欣 王华 林银河 郑权 柴先义 LUO Lingen;PANG Jianming;LI Xing;SONG Yaoxin;WANG Hua;LIN Yinhe;ZHENG Quan;CHAI Xianyi(Resource Application and Alloy Materials Division,China Iron and Steel Research Institute Group,Beijing 100081,China;Special Steel Company,Maanshan Iron and Steel Company Limited,Maanshan 243002,Anhui,China;Institute of Chemical Engineering,Yangtze Normal University,Chongqing 408100,China;Engineering and Research Institute of Iron and Steel,Huatian(Nanjing)Engineering and Technology Corporation,MCC,Nanjing 210000,Jiangsu,China;Steelmaking Division,Anhui Shoukuang Dachang Metal Material Co.,Ltd.,Lu'an 237400,Anhui,China)

机构地区：[1]中国钢研科技集团有限公司资源应用与合金材料事业部,北京100081 [2]马鞍山钢铁股份有限公司特钢公司,安徽马鞍山243000 [3]长江师范学院化学化工学院,重庆408100 [4]中冶华天南京工程技术有限公司钢铁设计研究总院,江苏南京210000 [5]安徽首矿大昌金属材料有限公司炼钢事业部,安徽六安237400

出　　处：《钢铁》2024年第8期13-18,49,共7页Iron and Steel

基　　金：国家重点研发计划资助项目(2023YFB4202002);中国钢研科技集团有限公司青年基金资助项目(KNJT03-JTOM-21013);四川钒钛产业发展研究中心一般资助项目(2020VTCY-Y-02);承德国家可持续发展议程创新示范区建设科技专项资助项目(202206F005)。

摘　　要：以攀西钒钛磁铁矿为研究对象,分析了攀西钒钛磁铁矿综合利用工艺方案现状。考虑到传统工艺采用碳质还原剂或加入添加剂还原后产品中有过量的碳和添加剂残留,将对制得的产品造成污染,尤其是钠盐添加剂更是一种环境污染因子,工业化处理成本较高等弊端,提出采用氢气还原-磨选工艺处理钒钛磁铁矿以实现铁、钛2种元素的分离。研究过程先对钒钛磁铁矿用氢气还原,使矿中的铁氧化物绝大部分还原为金属铁,再通过细磨磁选分离钛和铁元素。研究表明,在1200℃还原4 h,钒钛磁铁矿金属化率可达86.21%;还原钒钛磁铁矿经细磨60 min,得到粒度D_(50)约为10.5μm的微粒,在磁场强度为80 m T条件下进行湿式磁选,可得到TFe质量分数为89.34%、TiO_(2)质量分数为0.83%、V_(2)O_(5)质量分数为0.33%的金属铁粉和TFe质量分数为6.22%、TiO_(2)质量分数为36.82%、V_(2)O_(5)质量分数为2.35%的非磁性物,从而实现铁钛元素的分离。还原-磨选工艺应用于钒钛磁铁矿的铁、钛元素分离有较好的效果,获得的金属铁粉铁含量高、铁收率高,同时渣中钒、钛元素得到有效富集有利于后续提取钒、钛元素;氢气作为还原剂不会带来二次污染。还原-磨选工艺有望实现钒钛磁铁矿综合利用,有较好的应用前景,可进一步开展更大规模试验研究。Taking Panxi vanadium titanium magnetite as the research object,the current status of the comprehensive utilization process plan for Panxi vanadium titanium magnetite was analyzed.Considering the traditional process of using carbon reducing agents or adding additives to reduce the excess carbon and additive residues in the product,it will cause pollution to the produced product,especially sodium salt additives,which are an environmental pollution factor and have the disadvantage of high industrial processing costs,the use of hydrogen reduction grinding process to treat vanadium titanium magnetite to achieve the separation of iron and titanium elements was proposed.The research process first involves reducing vanadium titanium magnetite with hydrogen gas,reducing the majority of iron oxides in the ore to metallic iron,and then separating titanium and iron elements through fine grinding and magnetic separation.Research has shown that the metallization rate of vanadium titanium magnetite can reach 86.21%after 4 h of reduction at 1200℃;Reduced vanadium titanium magnetite was finely ground for 60 min to obtain a particle size of D_(50)about 10.5μm Under the condition of a magnetic field strength of 80 mT,wet magnetic separation can be carried out on m particles to obtain metal iron powder with TFe mass percent of 89.34%,TiO_(2)mass percent of 0.83%,V_(2)O_(5)mass percent of 0.33%,and non-magnetic materials with TFe mass percent of 6.22%,TiO_(2)mass percent of 36.82%,and V_(2)O_(5)mass percent of 2.35%,thereby achieving the separation of iron and titanium elements.The application of reduction grinding process in the separation of iron and titanium elements in vanadium titanium magnetite has a good effect.The obtained metal iron powder has a high iron content and iron yield,and the effective enrichment of vanadium and titanium elements in the slag is conducive to the subsequent extraction of vanadium and titanium elements;Hydrogen gas as a reducing agent will not cause secondary pollution.The reduction grinding proce

关 键 词：氢还原 直接还原 铁钛分离 钒钛磁铁矿 磁选 

分 类 号：TF55[冶金工程—钢铁冶金]