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Deep Purification Process of Crude Nickel Sulfate as By-product of Copper Electrolysis
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Yongming YANG1, Wenyun ZHU2, Xuexian JIANG2, 3, Jinli LI3, Zongqing HE1, Caihong HUANG1, Zhonglin LI2, Guixiang HE2, 3
Hydrometallurgy of China | 2025, 44(3) : 398 - 405
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Hydrometallurgy of China | 2025, 44(3): 398-405
• Experiment Research •
Deep Purification Process of Crude Nickel Sulfate as By-product of Copper Electrolysis
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Yongming YANG1, Wenyun ZHU2, Xuexian JIANG2, 3, Jinli LI3, Zongqing HE1, Caihong HUANG1, Zhonglin LI2, Guixiang HE2, 3
Affiliations
  • 1 Guangxi Nanguo Copper Co., Ltd., Fusui 532301, China
  • 2 Department of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
  • 3 Guilin University of Technology at Nanning, Nanning 530001, China
Published: 2025-06-20 doi: 10.13355/j.cnki.sfyj.2025.03.014
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In order to reduce the content of impurities such as Cu, Fe, Zn and reduce the loss of Ni in crude nickel sulfate solution of copper electrolysis by-products, the process of selective precipitation of copper by Na2S2O3—deep extraction of zinc removal iron—evaporation crystallization was studied for deep purification of the solution, and the key process parameters were optimized. The results show that the precipitation rate of Cu can reach 99.89% and the loss rate of Ni is only 1.22% using Na2S2O3 as precipitator under the optimum conditions of Na2S2O3 excess coefficient of 2.0, solution pH of 5.0, reaction temperature of 85 ℃ and reaction time of 2 h. Using P204 as extracant, the extraction rates of Zn and Fe can reach 99.87% and 99.98%, respectively, and the loss rate of Ni is 2.24% under the optimal conditions of pH=3.0, P204 volume fraction of 25%, saponification rate of 50%, VO/VA=1.5/1, extraction temperature of 25 ℃ and extraction time of 10 min. Electroplating grade nickel sulfate crystal products are obtained by evaporation and crystallization of the deeply purified nickel sulfate solution. The quality can meet the national standard GB/T 26524—2023 Class Ⅱ indicators, and can be used as high-quality raw materials for electroplating and other industrial uses.

crude nickel sulfate  /  selective precipitation  /  vulcanization  /  extraction  /  deep purification  /  copper  /  iron  /  electrolysis
Yongming YANG, Wenyun ZHU, Xuexian JIANG, Jinli LI, Zongqing HE, Caihong HUANG, Zhonglin LI, Guixiang HE. Deep Purification Process of Crude Nickel Sulfate as By-product of Copper Electrolysis[J]. Hydrometallurgy of China, 2025 , 44 (3) : 398 -405 . DOI: 10.13355/j.cnki.sfyj.2025.03.014
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Year 2025 volume 44 Issue 3
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Article Info
doi: 10.13355/j.cnki.sfyj.2025.03.014
  • Receive Date：2024-08-07
  • Online Date：2025-09-01
  • Published：2025-06-20
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  • Received：2024-08-07
Funding
Affiliations
    1 Guangxi Nanguo Copper Co., Ltd., Fusui 532301, China
    2 Department of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
    3 Guilin University of Technology at Nanning, Nanning 530001, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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