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| Study on Slag – Matte - Gas Equilibrium in Copper Flash Smelting Process |
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Received:October 20, 2021
Revised:October 21, 2021
Accepted:November 06, 2021
Published Online:February 18, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.03.006 |
| KeyWord:flash smelting; intensified smelting; smelting slag; liquidus temperature; oxygen partial pressure; sulfur partial pressure |
| Author | Institution |
| ZHAO Bao-jun |
江西理工大学 |
| XIE Sui |
江西理工大学 |
| LI Ming-zhou |
江西理工大学 |
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| Abstract: |
| The process of copper flash smelting with high-oxygen enrichment has high productivity and high concentration of SO2 in the gas, but it is difficult to control matte grade and copper content in slag. The smelting temperature should be higher than liquidus temperature of slag to ensure its fluidity for efficient separation of matte and slag, and smooth tapping of slag. However, excessive temperature accelerates erosion of refractory and reduces furnace life. To obtain the optimized production parameters, microstructures and phase compositions of quenched slag and matte from a copper flash smelting furnace were determined by electron probe X-ray microanalysis (EPMA). FactSage 8.1 software was used to calculate correlations among matte grade, sulfur partial pressure and oxygen partial pressure. Effects of slag composition (Fe/SiO2, Al2O3, CaO, MgO, ZnO concentrations) and sulfur partial pressure on liquidus temperature of slag were also discussed. |
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