Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration
To determine slag properties and the factors influencing these properties for optimization of operating conditions in the copper flash smelting process, the composition and microstructures of the quenched smelting and converting slags have been analyzed. Thermodynamic software FactSage 8.2 has been...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/1/153 |
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| author | Sui Xie Xinhua Yuan Fupeng Liu Baojun Zhao |
| author_facet | Sui Xie Xinhua Yuan Fupeng Liu Baojun Zhao |
| author_sort | Sui Xie |
| collection | DOAJ |
| description | To determine slag properties and the factors influencing these properties for optimization of operating conditions in the copper flash smelting process, the composition and microstructures of the quenched smelting and converting slags have been analyzed. Thermodynamic software FactSage 8.2 has been used to investigate the effects of matte grade, SO<sub>2</sub> partial pressure, and the Fe/SiO<sub>2</sub> ratio on the liquidus temperature and the copper content of the smelting slag. The possibility to recover valuable metals from the smelting and converting slags through pyrometallurgical reduction by carbon is also discussed. It was found that the flash smelting slag temperature is usually higher than its liquidus temperature and the copper (1.2% Cu) is mainly present in the slag as dissolved copper. In the copper flash smelting process, the copper content in the slag can be decreased by decreasing the Fe/SiO<sub>2</sub> ratio and temperature. In pyrometallurgical slag reduction, most Cu, Mo, and Ni can be recovered as an alloy. The conditions of recovery such as the ratio of smelting slag to converting slag, temperature, and reduction extent have been discussed. |
| first_indexed | 2024-03-09T11:41:37Z |
| format | Article |
| id | doaj.art-8a1eb374bf6449f3908898f074675fae |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T11:41:37Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-8a1eb374bf6449f3908898f074675fae2023-11-30T23:31:27ZengMDPI AGMetals2075-47012023-01-0113115310.3390/met13010153Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic ConsiderationSui Xie0Xinhua Yuan1Fupeng Liu2Baojun Zhao3Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi Copper Corporation Guixi Smelter, Guixi 335400, ChinaFaculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaFaculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaTo determine slag properties and the factors influencing these properties for optimization of operating conditions in the copper flash smelting process, the composition and microstructures of the quenched smelting and converting slags have been analyzed. Thermodynamic software FactSage 8.2 has been used to investigate the effects of matte grade, SO<sub>2</sub> partial pressure, and the Fe/SiO<sub>2</sub> ratio on the liquidus temperature and the copper content of the smelting slag. The possibility to recover valuable metals from the smelting and converting slags through pyrometallurgical reduction by carbon is also discussed. It was found that the flash smelting slag temperature is usually higher than its liquidus temperature and the copper (1.2% Cu) is mainly present in the slag as dissolved copper. In the copper flash smelting process, the copper content in the slag can be decreased by decreasing the Fe/SiO<sub>2</sub> ratio and temperature. In pyrometallurgical slag reduction, most Cu, Mo, and Ni can be recovered as an alloy. The conditions of recovery such as the ratio of smelting slag to converting slag, temperature, and reduction extent have been discussed.https://www.mdpi.com/2075-4701/13/1/153smelting slagliquidus temperatureconverting slagFactSage |
| spellingShingle | Sui Xie Xinhua Yuan Fupeng Liu Baojun Zhao Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration Metals smelting slag liquidus temperature converting slag FactSage |
| title | Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration |
| title_full | Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration |
| title_fullStr | Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration |
| title_full_unstemmed | Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration |
| title_short | Control of Copper Content in Flash Smelting Slag and the Recovery of Valuable Metals from Slag—A Thermodynamic Consideration |
| title_sort | control of copper content in flash smelting slag and the recovery of valuable metals from slag a thermodynamic consideration |
| topic | smelting slag liquidus temperature converting slag FactSage |
| url | https://www.mdpi.com/2075-4701/13/1/153 |
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