石煤焙烧物料提钒的试验研究  

Extraction of Vanadium from Materials of Stone Coal Roasting

作　　者：朱军[1] 郭继科[1] 齐建云[2] 刘新运 薛晶晶[1] 王娜[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北有色地质研究院,陕西西安710054 [3]陕西五洲矿业股份有限公司,陕西西安710055

出　　处：《稀有金属》2012年第5期804-810,共7页Chinese Journal of Rare Metals

基　　金：陕西省科技厅创新重点项目(2011KTDZ01)资助

摘　　要：以石煤脱碳焙烧利用热值后的物料为研究对象。采用"硫酸+助浸剂浸出,浸出液经回调pH值及还原处理后萃取和反萃取,反萃取液氧化后经酸性铵盐沉钒等"工艺制取五氧化二钒。工艺参数:在物料粒径小于37μm(100%)、硫酸用量为50%、助浸剂用量为4%、液固比为2.5∶1、浸出温度为90℃、浸出时间为7 h等条件下浸出,在12.5%P204+5%TBP+82.5%磺化煤油为有机相、水相pH值为2、相比为2∶1、三级逆流萃取、1.5 mol.L-1硫酸三级逆流反萃取等条件下萃取和反萃取。结果表明:浸出过程经动力学分析,表观活化能为46.26kJ.mol-1,属于化学反应控制过程;钒总回收率达75%以上;V2O5产品纯度大于99%,符合GB3283-1987质量要求;全流程几乎无废气外排,废水经处理后循环使用率达97%以上,废渣可用于建材,属于清洁型提钒工艺。The stone coal removed carbon by roasting was taken and calorific values were used as the study object.Leaching by sulfuric acid＋aid-leaching agent,extracting and anti-extracting after regulating pH and reduction treatment,anti-extraction liquid produced V2O5 after oxidation by acid ammonium salt precipitation of vanadium processes.The results demonstrated that vanadium total recovery rate was more than 75%,the purity of the V2O5 product was higher than 99%,in line with GB3283-1987 quality requirements,the whole process was almost no waste gas emission,recycling rate of waste water reached above 97% after treatment,the waster slag could be used for building materials,the process was a clean type of the vanadium extraction process.

关 键 词：石煤 浸出 动力学 萃取 五氧化二钒 

分 类 号：TG146.413[一般工业技术—材料科学与工程]