硅质石煤钒矿提钒新工艺研究  

Study on the New Process of Vanadium Extraction from Siliceous Stone Coal

作　　者：孙德四[1] 张立明[1] 张贤珍[1] 

机构地区：[1]九江学院化学化工学院,江西省鄱阳湖生态经济研究中心,江西九江332005

出　　处：《稀有金属与硬质合金》2010年第2期5-10,共6页Rare Metals and Cemented Carbides

基　　金：江西省教育厅科技项目(GJJ09351)

摘　　要：通过单因素条件试验确定了＂空白焙烧-碱浸＂和＂氧化剂氧化-酸浸＂这两种提钒工艺的最优工艺参数。试验结果表明：空白焙烧-碱浸的最佳工艺条件为矿样粒度0.074 mm、焙烧温度800℃、焙烧时间3 h、氧分压10~100Pa、浸出温度90℃、浸出时间3 h、烧碱浓度40 g/L、液固比1.5∶1.0,在此条件下钒的浸出率可达到83.8%,比传统的钠化焙烧-酸（碱）浸工艺提高20%以上。在矿物粒度0.074 mm、氧化剂MnO2用量为5%、硫酸浓度为40%（质量分数）、浸出温度为90℃、浸出时间为9 h、液固比为2.5∶1.0的条件下,氧化剂氧化-酸浸提钒工艺的钒浸出率可达72.4%,比传统的钠化焙烧工艺高出10%以上。Based on the single-factor condition test,the optimal technological parameters are determined for vanadium extraction by the＂roasting without additives-alkaline leaching＂and the oxidizer-oxidizing-acid leaching processes.The test results show that with mineral particle size 0.074 mm,oxygen partial pressure 10～100 Pa,roasting duration 3 h,leaching temperature 90 ℃,3 h leaching duration,caustic soda concentration 40 g/L,liquid-solid ratio 1.5∶1.0,the leaching rate of vanadium pentoxide by roasting without additives-alkaline leaching＂ can reach 83.8%,20% higher than that bytraditional sodium roasting-acid or alkaline leaching,with mineral particle size 0.074 mm,MnO2 oxidizer consumption at 5%,sulfuric acid concentration at 40%,leaching temperature 90 ℃,9 h leaching duration,liquid-solid ratio 2.5∶1.0,the leaching rate of vanadium pentoxide by oxidizer-oxidizing-acid leaching can reach 72.4%,10% higher than that by the traditional sodium roasting.

关 键 词：硅质石煤钒矿 空白焙烧 碱浸 氧化剂 酸浸 提钒工艺 

分 类 号：TQ135.11[化学工程—无机化工]