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Recovery of Ni matte from Ni-bearing electroplating sludge.
Wang, Hong-Yang; Li, Yu; Jiao, Shu-Qiang; Chou, Kuo-Chih; Zhang, Guo-Hua.
Affiliation
  • Wang HY; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing, 100083, China.
  • Li Y; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
  • Jiao SQ; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
  • Chou KC; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
  • Zhang GH; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China; Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing, 100083, China. Electronic address: ghzhang091
J Environ Manage ; 326(Pt A): 116744, 2023 Jan 15.
Article in En | MEDLINE | ID: mdl-36375435
ABSTRACT
In this study, a novel process for the recovery of Ni from Ni-bearing electroplating sludge (ES) is proposed, which involves the carbothermic reduction stage and smelting stage. In the reduction stage, the CaSO4, Fe2O3, and NiO in the ES were reduced by carbon at 1000 °C, and the Ni3S2 and Fe4Ni5S8(Ni-rich phases) were generated. After that, the reduced ES was mixed with SiO2 and smelted at 1500 °C. During the smelting stage, Ni3S2 and Fe4Ni5S8 were melted to form liquid Ni-Fe-S matte and separated from the molten slag by gravity. Finally, 58.5%Ni-13.8%Fe-27.7%S (in weight) matte and vitrified slag were obtained. The recovery ratio of Ni (97.2%) was much higher than that of Fe (14.7%). Besides, the Ni/Fe mass ratio of the ES was 0.7, while the ratio of the prepared matte was about 4.2. Therefore, the selective recovery of Ni was achieved. The obtained Ni matte can be used as the raw material for pure Ni or Ni-bearing chemicals.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Sewage / Electroplating Language: En Journal: J Environ Manage Year: 2023 Document type: Article Affiliation country: China
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Sewage / Electroplating Language: En Journal: J Environ Manage Year: 2023 Document type: Article Affiliation country: China