含镍废液制备硫酸镍并深度除Fe、Cu、Zn

发布时间：2018-02-23 22:01

本文关键词： 含镍废液硫酸镍除杂 P萃取剂　出处：《矿产综合利用》2017年05期 　论文类型：期刊论文

【摘要】：本文以镀镍行业产生的含Fe、Cu、Zn等杂质的硫酸镍废液为原料,通过采用氧化、化学沉淀、P204多级萃取等低成本的方法,实现了Fe、Cu、Zn等主要杂质的深度去除,制备出符合HG/T 2824-2009中Ⅰ类一等品的硫酸镍产品。试验重点考察了双氧水用量用量对除铁的影响,以及中和pH值、萃取pH值、萃取相比等技术参数对Fe、Cu、Zn、Ni除杂率的影响,并按照最佳条件处理了一批10 L废液得到2300 g硫酸镍产品,一次结晶率达60%。试验结果表明:用双氧水氧化后石灰中和至pH值5.0,Fe离子沉淀完全;在中和终点pH值4.5~5.7范围内,Fe、Cu、Ni的沉淀率随pH值的增大而增大,Zn的变化不大;pH值达5.7,Cu的沉淀率达98.4%;P204对金属离子的萃取顺序为:Fe3+Zn~(2+)Cu~(2+)Fe~(2+)Ni~(2+);P204可有效萃取分离Fe、Cu、Zn等杂质;经萃取分离后硫酸镍溶液中Fe、Cu、Zn的含量全部达到10-3g/L以下。
[Abstract]:In this paper, the waste solution of nickel sulfate produced by nickel plating industry is used as raw material. By using low cost methods, such as oxidation, chemical precipitation and P204 multistage extraction, the deep removal of main impurity such as Fe CuN Zn and so on has been realized. The nickel sulfate products which accord with the first class of HG/T 2824-2009 were prepared. The effects of the amount of hydrogen peroxide on iron removal and the effects of neutralization pH value, extraction pH value and extraction comparison on the impurity removal rate of Fe _ (2) Cu ~ (2 +) Zn ~ (2 +) Ni were investigated. According to the optimum conditions, 2300g nickel sulfate was obtained from a batch of 10L waste liquid, with a primary crystallization rate of 60. The results showed that the lime was oxidized with hydrogen peroxide and neutralized to pH value 5.0% Fe ion to precipitate completely. In the range of pH 4.55 ~ 5.7 at the neutralization end point, the precipitation rate of Fe ~ (2 +) Cu ~ (2 +) increases with the increase of pH value. The precipitation rate of Fe ~ (2 +) Cu ~ (2 +) with pH value up to 5.7o Cu is 98.4%. The extraction order of metal ions is: (1) Fe _ (3) Zn~(2 ~ (2) Zn~(2 ~ (2) Fe ~ ((2)) ~ ((2)) ~ ((2)) ~ ((2)) (P _ (204)) can effectively extract and separate impurity such as Fe, Cu, Zn and so on. After extraction, the content of Fe ~ (2 +) Cu ~ (2 +) Zn in nickel sulfate solution is below 10 ~ (-3) g / L.
【作者单位】：广西有色金属及特色材料加工教育部重点实验室;广西冶金研究院有限公司;
【基金】：广西有色金属及特色材料加工教育部重点实验室开放课题基金项目(GXKFJ14-04)
【分类号】：TQ138.13;X781.1

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