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纳滤耦合电渗析工艺处理镍电积阳极液研究

作者：徐强，王小贞，张鹏云，王应平

单位： 1.甘肃省膜科学技术研究院有限公司，甘肃省膜分离工程技术研究中心，兰州 730020； 2.中共甘肃省委党校，兰州 730070

关键词：阳极液酸盐分离纳滤膜电渗析

DOI号：

分类号： X758

出版年,卷(期):页码： 2021,41(5):130-138

摘要：

为降低镍电积生产工艺中的纯碱消耗，采用纳滤-电渗析耦合技术对电积镍阳极液进行酸盐分离并回收稀酸，首先利用特种纳滤膜将阳极液中硫酸镍与硫酸分离，然后利用电渗析技术对分离后产生的稀酸液进行浓缩回用。结果表明，在料液温度55℃、运行压力3.5Mpa、流量1000L/h的条件下，该纳滤膜可实现镍离子截留率为91.36%，氢离子脱除率为73.07%，具有较好的酸盐分离效果。电渗析可对分离出的稀酸进行浓缩，最高可使硫酸浓度提高4.3倍达33.8g/L。纳滤膜耦合电渗析工艺处理镍电积阳极液工艺无废水排放，具有良好的经济效益和环境效益。

In order to reduce the Na2CO3 consumption of nickel electrowinning, the coupling technologies of nanofiltration and electrodialysis ware used to separate acid-salt from the anodic solution and recover the dilute acid.. The nickel sulfate in the anodic solution was separated from the sulfuric acid by special nanofiltration membrane, followed by the dilute acid being concentrated and reused by electrodialysis. The results show that under the conditions of feed temperature of 55℃, operating pressure 3.5 MPa and flow rate of 1000L/h, the retention rate of nickel ion and the removal rate of hydrogen ion were 91.36% and 73.07% respectively.There was a good separation effect for acid-salt by nanofiltration. Electrodialysis can concentrate the separated dilute acid. A maximum concentration of sulfuric acid was increased by 4.3 times to 33.8 g/L. The anode liquor of nickel electrowinning was treated by nanofiltration coupled with electrodialysis, showing advantages of no waste water discharge and good economic and environmental benefits.

基金项目：

甘肃省重点研发计划项目工业类（20YF3GA004）

作者简介：

徐强（1981-），男，工程师，研究方向：膜分离技术应用，

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