从含镍电镀污泥中回收镍冰铜。
Recovery of Ni matte from Ni-bearing electroplating sludge.
机构信息
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.
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China.
出版信息
J Environ Manage. 2023 Jan 15;326(Pt A):116744. doi: 10.1016/j.jenvman.2022.116744. Epub 2022 Nov 12.
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 CaSO, FeO, and NiO in the ES were reduced by carbon at 1000 °C, and the NiS and FeNiS(Ni-rich phases) were generated. After that, the reduced ES was mixed with SiO and smelted at 1500 °C. During the smelting stage, NiS and FeNiS 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.
在这项研究中，提出了一种从含镍电镀污泥（ES）中回收镍的新工艺，该工艺包括碳热还原阶段和熔炼阶段。在还原阶段，ES 中的 CaSO、FeO 和 NiO 在 1000°C 下被碳还原，生成 NiS 和 FeNiS（富镍相）。然后，将还原后的 ES 与 SiO 混合并在 1500°C 下熔炼。在熔炼阶段，NiS 和 FeNiS 熔融形成液态 Ni-Fe-S 冰镍，并通过重力与熔渣分离。最后，得到 58.5%Ni-13.8%Fe-27.7%S（重量）的冰镍和玻璃态渣。镍的回收率（97.2%）远高于铁（14.7%）。此外，ES 中的 Ni/Fe 质量比为 0.7，而制备的冰镍的比值约为 4.2。因此，实现了镍的选择性回收。所得的镍冰镍可用作纯镍或含镍化学品的原料。
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