钒铬还原渣碱浸提钒工艺及其动力学  

Leaching Technology and Kinetics of Vanadium from Vanadium and Chromium-bearing Slag by Alkaline Process

作　　者：郭超[1,2] 张洋[2] 乔珊[2] 郑诗礼[2] 谢华[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190

出　　处：《过程工程学报》2015年第3期400-405,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金面上基金资助项目(编号:51274179);中国科学院重点部署项目资助(编号:KGCX2-EW-215)

摘　　要：采用常压下空气氧化-碱浸工艺,对钒冶炼的钒铬还原渣进行提钒.通过正交实验考察了碱浓度、浸出温度、液固比对钒浸出率的影响,研究了钒的浸出动力学.结果表明,最佳条件为碱浓度100 g/L、浸出温度100℃、液固比4 m L/g、浸出时间1 h.该条件下钒浸出率最高达98%.钒的浸出过程符合核收缩模型,受扩散步骤控制,表观活化能为11.04 k J/mol.Vanadium was extracted from vanadium and chromium-bearing slag from the vanadium smelting process by air oxidation process and alkaline leaching process under atmospheric pressure. The effects of alkali concentration, leaching temperature, ratio of liquid to solid on the leaching rate of vanadium by orthogonal experiments were examined, and the leaching kinetics was also studied. The results showed that the optimum leaching conditions were the NaOH concentration of 100 g/L, leaching temperature 100 ℃, ratio of liquid to solid 4 mg/L and leaching time 1 h. Under the conditions, the leaching rate of vanadium reached 98%. Vanadium leaching process was in line with nuclear shrinkage model, the leaching process was controlled by diffusion step, and the apparent activation enerm/was 11.04 kJ/mol.

关 键 词：钒铬还原渣 钒 铬 分离 碱浸 动力学 

分 类 号：TQ110.9[化学工程—无机化工]