摘要
利用ICP-AES及ICP-MS法研究了从石煤钒矿直接酸浸液提取V过程中各元素的留存量。研究结果表明,加碱除杂工序中,当pH=2.8或12.2时V留存率高,元素留存率-pH关系曲线可分为4种:U型曲线、下降曲线、上升曲线以及水平曲线。氧化工序中,在pH=2.8或12.2下分别加入4种氧化剂,从氧化结果与生产成本综合考虑,使用Na_2S_2O_8在pH=2.8下进行氧化效果最佳。萃取-反萃工序不能去除含量最多的杂质Na,反而使杂质P的含量大为增加,此步骤的必要性有待进一步研究。
Investigation is made on the amount of the residual elements by ICP-AES and ICP-MS during va- nadium extraction from direct acid leaching solution of carbonaceous shale vanadium ore. During alkali addition for impurity removal,vanadium retention rate is high at pH of 2.8 and 12.2,and element retention rate-pH curves are divided into four groups： U-type curves, descending curves, ascending curves and horizontal curves. During oxidation,four kinds of oxidants were added into the solution with the pH of 2.8 and 12.2. In terms of oxidation effect and production cost,the use of Na2S2O8 with pH of 2.8 can result in optimal oxidization effect. Extraction-stripping cannot remove Na impurity of the highest content, but it can greatly increase the content of P impurity instead. The necessity of extraction-stripping is to be further studied
出处
《稀有金属与硬质合金》
CSCD
北大核心
2017年第3期5-9,44,共6页
Rare Metals and Cemented Carbides
基金
中央高校基本科研业务费专项资金(2652013071)
中国地质大学(北京)大学生创新创业训练计划项目(201716)
关键词
钒提取
石煤钒矿
直接酸浸
加碱除杂
氧化
萃取
反萃
vanadium extraction
carbonaceous shale vanadium ore
direct acid leaching
alkali addition and impurity removal
oxidation
extraction
stripping
