有色金属科学与工程2016，Vol.7Issue(5)：26-32,7.DOI:10.13264/j.cnki.ysjskx.2016.05.005
从镍电镀污泥回收的硫酸镍溶液的深度净化
Deep purification of nickel sulfate solution produced by Ni-electroplating sludge recycling process
摘要
Abstract
The crude nickel sulfate solution recycled from nickel electroplating sludge leaching solution of sulfuric acid was purified by Nickel saponified P507 extracting agent. The extraction isotherm was drawn by analyzing the effects of feed solution pH, phase ratio, extraction time and temperature on the extraction process. The back-extraction rule of the main impurity ions by different concentrations H 2SO4 was investigated. The results show that under the following optimum conditions, that is, using 10 % P507 (volume fraction) plus sulphonated kerosene as the extractant, Nickel saponification rate is 80 %, pH= 2.2, VO/VA=1/8, in 30 ℃ and reaction time is 5 min, the concentrate of Fe3+ion can be decreased close to 40 mg/L after a six stage counter current extraction. After iron removal process the Nickel sulfate solution can be deep purified under the following optimum conditions, that is, 80 % saponification rate, pH = 3.3, VO/VA=1/8, in 30 ℃ and reaction time is 5 min, after a four stage counter current extraction the concentrate of the rest impurity ions can be decreased to reach the range of deep purification standard. The purification loaded organic can be stripped using 4 mol/L H2SO4 solution under the following condition: VO/VA =5/1, in 30 ℃ and reaction time is 5 min, after a four stage counter current stripping the organic phase can be reused. The tripping liquor can be reused by the stage of electroplating sludge leaching.关键词
P507/硫酸镍/深度净化/镍电镀污泥/镍皂化Key words
P507/nickel sulfate/deep purification/nickel electroplating sludge/nickel saponification分类
资源环境引用本文复制引用
吴青谚,张贵清..从镍电镀污泥回收的硫酸镍溶液的深度净化[J].有色金属科学与工程,2016,7(5):26-32,7.基金项目
湖南省重大科技专项资助项目 （）
