Reductive-sulfurizing smelting treatment of smelter slag for copper and cobalt recovery
| Autor: | Chong-Jian Tang, Shenghai Yang, M.T. Tang, Yongming Chen, Jun He, Yun Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
lcsh:TN1-997
Materials science Recovery of cobalt and copper Cleaned slag chemistry.chemical_element Iron sulfide Smelter slag 010501 environmental sciences engineering.material 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound Materials Chemistry lcsh:Mining engineering. Metallurgy 0105 earth and related environmental sciences Metallurgy Metals and Alloys Slag Coke Geotechnical Engineering and Engineering Geology Cobalt sulfide Copper Copper-cobaltmatte chemistry Reductive-sulfurizing smelting Mechanics of Materials visual_art Smelting Slag cleaning engineering visual_art.visual_art_medium Pyrite Cobalt |
| Zdroj: | Journal of Mining and Metallurgy. Section B: Metallurgy, Vol 54, Iss 1, Pp 73-79 (2018) |
| ISSN: | 2217-7175 1450-5339 |
| DOI: | 10.2298/jmmb160315049l |
| Popis: | Recovery of copper and cobalt from smelter slag using reductive-sulfurizing smelting method was performed in this study. The effects of reductive agent (coke), sulfurizing agent (pyrite), slag modifier (CaO) and smelting temperature and duration on the extractive efficiencies of Cu, Co and Fe were discussed. The phase compositions and microstructure of the materials, copper-cobalt matte and cleaned slag were determined. The results showed that copper and cobalt contents in cleaned slag could decrease averagely to 0.18% and 0.071% respectively after cleaning. 91.99% Cu and 92.94% Co and less than 38.73% Fe were recovered from the smelter slag under the optimum conditions: 6 wt.% coke, 20 wt.% pyrite and 6 wt.% CaO addition to the smelter slag, smelting temperature of 1350?C and smelting duration of 3h. The addition of CaO can increase the selectivity of Co recovery. The cleaning products were characterized by XRD and SEM-EDS analysis. The results showed that the main phases of copper-cobalt matte were iron sulfide (FeS), geerite (Cu8S5), iron cobalt sulfide (Fe0.92Co0.08S) and Fe-Cu-Co alloy. The cleaned slag mainly comprised fayalite (Fe2SiO4), hedenbergite (CaFe(Si2O6)) and magnetite (Fe3O4). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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