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| Optimization of slag type of reduction smelting tests of a copper oxide concentrate in Congo |
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Received:April 28, 2020
Revised:May 14, 2020
Accepted:May 17, 2020
Published Online:January 29, 2021
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| DOI： |
| KeyWord:Copper oxide concentrate; reduction smelting; slag optimization; tests |
| Author | Institution |
| su feng lai |
Zijin Mining Group COMMUS SAS |
| zhang deng gao |
BGRIMM Technology Group |
| zheng chao zhen |
BGRIMM Technology Group |
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| Abstract: |
| The copper oxide concentrate obtained by flotation in Congo (DRC) contains 28.39% copper, and the copper in the ore mainly occurs in malachite. In the actual production, the blast furnace reduction smelting is used to treat this kind of copper oxide concentrate, which has the problems of high smelting temperature, large amount of calcium oxide dosage and high copper content in the smelting slag. Therefore, the slag type optimization tests are carried out, and the effects of reducing coke ratio, CaO:SiO2 ratio and the amount of ferrous oxide added on the reduction smelting of copper oxide concentrate are investigated. The results show that the coke ratio mainly affects the yield and recovery of crude copper, CaO:SiO2 mainly affects the content of copper in slag, and melting temperature is the main factor affecting the viscosity of slag. Under the condition of reducing coke ratio of 5 %, selecting acid smelting slag type, CaO:SiO2 in the slag is 0.4-0.55, FeO:SiO2 is 0.13, the copper content in the slag can be reduced to less than 0.4 %, and the copper recovery rate is more than 98 %. |
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