Separation and Extraction of Valuable Metals from Electroplating Sludge by Carbothermal Reduction and Low-Carbon Reduction Refining
| Autor: | Lei Tian, Zhi-Qiang Chen, Yong Liu, Dudan Liu, Xuan-gao Wu, Zhifeng Xu, Caifang Cao, Ao Gong, Lijie Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Electrolysis
Materials science Metallurgy 0211 other engineering and technologies General Engineering chemistry.chemical_element 02 engineering and technology Zinc 021001 nanoscience & nanotechnology Copper law.invention Nickel chemistry Carbothermic reaction law General Materials Science 0210 nano-technology Electroplating 021102 mining & metallurgy Refining (metallurgy) Roasting |
| Zdroj: | JOM. 72:782-789 |
| ISSN: | 1543-1851 1047-4838 |
| DOI: | 10.1007/s11837-019-03880-3 |
| Popis: | This paper proposes an innovative carbothermal reduction roasting low-carbon redox refining process for recovering valuable metals, including copper, zinc, nickel, tin and lead, from electroplating sludge. First, the valuable metals are volatilized into the flue gas by carbothermal reduction roasting. At a reduction temperature of 1473 K, a carbon content of 20%, and a reaction time of 60 min, the ratio of Pb, Sn and Zn removal reached 90.77%, 95.14% and 99.92%, respectively. At an oxidation temperature of 1573 K, a SiO2 content of 6% and a reaction time of 180 min, a water-quenching slag suitable for building materials was obtained by low-carbon oxidation reduction refining. Finally, at a reduction temperature of 1473 K, 8% C addition, and a reaction time of 20 min, copper and nickel were enriched on an anode copper plate and the copper content reached more than 98%, meeting the requirements for copper electrolysis. |
| Databáze: | OpenAIRE |
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