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| Research on Physical and Chemical Properties of Reduction Smelting Slag of a Copper Oxide Concentrate in Democratic Republic of Congo |
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Received:December 25, 2020
Revised:December 31, 2020
Accepted:January 04, 2021
Published Online:May 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.06.003 |
| KeyWord:copper oxide concentrate; reduction smelting; slag properties; copper yield |
| Author | Institution |
| SU Feng-lai |
紫金矿业集团穆索诺伊矿业简易股份有限公司 |
| YANG Bi-wen |
矿冶科技集团有限公司 |
| ZHANG Deng-gao |
矿冶科技集团有限公司 |
| ZHENG Chao-zhen |
矿冶科技集团有限公司 |
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| Abstract: |
| Based on characteristics of high-silicon and low-iron content in a copper oxide concentrate, influence of basicity and FeO content on slag morphology, melting point, density, viscosity and electrical conductivity was investigated by reduction melting experiment in a high-temperature muffle furnace. The results show that this system slag mainly exists in glassy phase of calcium silicate, with Mg, Al and Fe dispersed in it. With increase of basicity from 0.2 to 0.6, melting point and density of slag drop first and rise later, viscosity rises first and drops later, and conductivity shows an rising trend. However, with increase of FeO content from 6% to 10%, melting point and viscosity of slag show a dropping trend, and density and conductivity show a rising trend. The suitable basicity of this system slag is about 0.5, and FeO addition should be less than 6%. Melting temperature is of <1 250 ℃, viscosity is of <2 Pa?s (1 400 ℃), and density is of 2.6~3.0 g/cm3. Thus, grade of crude copper is 96.5% with copper yield of 98% above. |
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