旋流电解技术脱除污酸中铜砷的研究

发布时间：2018-03-12 14:20

本文选题：污酸　切入点：旋流电解　出处：《稀有金属》2017年04期 　论文类型：期刊论文

【摘要】：污酸是有色金属冶炼中普遍存在的废酸,具有污染物种类多成分复杂、酸度高且最难处理的特点。污酸也是冶炼厂酸性重金属离子废水主要来源,其传统处理工艺产生大量危险废渣且处理成本高。旋流电解技术以可适用范围广且高选择性等特点日益受到重视。本论文利用旋流电解技术处理污酸溶液,研究了初始铜离子浓度对铜砷脱除效果的影响,并同并联循环连续电积脱砷法和控制阴极电势电积法做了比较。结果表明,在初始铜离子浓度为3 g·L~(-1)时,旋流电解6 h时砷脱除率最好(71.42%)。初始铜离子浓度3 g·L~(-1)以内时,砷脱除率随初始铜离子浓度升高而升高;初始铜离子浓度超过3 g·L~(-1)时,初始铜离子浓度升高对砷脱除不利。旋流电解技术可在高电流密度500 A·m~(-2)下进行脱砷,高于并联循环连续电积法的320 A·m~(-2)和控制阴极电势电积法200 A·m~(-2);其渣中铜砷比可达0.65∶1.00,远低于并联循环连续电积法的(1.8~2.8)∶1.0和控制阴极电势电积法的6.6∶1.0,减少了砷渣中铜的含量。
[Abstract]:Sewage acid is a common waste acid in non-ferrous metal smelting. It has the characteristics of complex kinds of pollutants, high acidity and the most difficult treatment. It is also the main source of acid heavy metal ion wastewater from smelters. The traditional treatment process produces a large number of dangerous waste slag and the treatment cost is high. The swirl electrolysis technology has been paid more and more attention because of its wide application range and high selectivity. In this paper, the hydrocyclone electrolysis technology is used to treat the waste acid solution. The effect of initial copper ion concentration on the removal of copper and arsenic was studied and compared with the parallel cycle continuous electrodeposition method and the controlled cathode potential electrodeposition method. The results showed that the initial copper ion concentration was 3 g 路L ~ (-1). When the initial copper ion concentration was 3 g 路L ~ (-1), the arsenic removal rate increased with the increase of the initial copper ion concentration, and when the initial copper ion concentration was above 3 g 路L ~ (-1), the removal rate of arsenic was the best at 6 h, when the initial copper ion concentration was above 3 g 路L ~ (-1), the arsenic removal rate increased with the increase of the initial copper ion concentration. The increase of initial copper ion concentration is unfavorable to arsenic removal. The swirl electrolysis technology can remove arsenic at a high current density of 500 A 路m ~ (-1) ~ (-2). The ratio of copper to arsenic in the slag is 0.65: 1.00, which is much lower than that in the parallel cycle continuous electrowinning method (1.88%) and the cathode potential electrodeposition method (6.66: 1.0), which reduces the content of copper in arsenic slag. The results show that the copper content in the slag is much lower than that in the parallel cycle continuous electrowinning method (320 A 路m ~ (-1)) and the controlled cathodic potential electrodeposition method (~ (200) A 路m ~ (-1) ~ (-2)), and the ratio of copper to arsenic in the slag is 0.65: 1.00.
【作者单位】：北京有色金属研究总院生物冶金国家工程实验室;
【基金】：国家国际科技合作专项项目(2014DF90920)资助
【分类号】：X758

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