Experimental Study on Recovery of Manganese from Wastewater of Vanadium Extraction
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摘要: 采用化学除杂—电解处理工艺，实现了提钒废水中金属锰的回收利用。研究了硫酸亚铁加入量、反应温度等因素对废水除钒效果的影响，得出较优的除钒参数：Fe/V摩尔比为1.2、反应温度60℃、反应时间40 min、反应终点pH为6~7。循环伏安测试结果表明，除杂后废水的电化学性质与标准锰电解液接近。对除杂后废水进行电解，得到纯度99.90%的金属锰产品，电流效率达到71.8%。XRD分析结果表明，得到的金属锰为立方晶体、α-Mn晶型。Abstract: Using the process of chemical removal of impurities-electrolysis,manganese in the wastewater produced from vanadium extraction was successfully recovered.The effects of different factors（ferrisulphas addition,reaction temperature and time,terminal reaction pH） on removal of vanadium from the wastewater were studied,and the optimum vanadium removal parameters of 1.2 for molar ratio of Fe to V,60 ℃ of reaction temperature,40 min of reaction time and 6～7 of terminal reaction pH were determined.The cyclic voltammetry test results show that the wastewater after impurities removal has similar electrochemical properties with standard manganese electrolytic solution.The metallic manganese with a purity of 99.90%,and a current efficiency of 71.8% were obtained by electrolysis of the wastewater after impurities removal.The XRD results show that the obtained metallic manganese is of cubic and α-Mn crystal forms.
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Key words:
- vanadium-containing wastewater /
- vanadium removal /
- electrolysis /
- metallic manganese
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