Kinetics of Oxidative Roasting of Complex Copper Concentrate
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- Kim Byung-Su
- Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources
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- Kim Eun-young
- Department of Resources Recycling, University of Science and Technology
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- Kim Chi-Kwon
- Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources
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- Lee Hoo-In
- Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources
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- Sohn Jeong-Soo
- Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources
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Abstract
As copper concentrates are progressively becoming more complex and low in grades, it is meaningful to remove sulfur from complex copper concentrates for smelting them by a carbon reduction process. In the present work, a kinetic study on the oxidative roasting of complex copper concentrate was experimentally investigated under nonisothermal condition in air using TGA equipment. Nonisothermal experiments were carried out at various linear heating rates up to 1123 K. Intermediates formed in each stage of the oxidative roasting of the complex copper concentrate were identified. After the first weight loss step, sulfate compounds were mainly formed in the second stage, and about 55% of sulfur contained in the concentrate was removed. In the third stage, the sulfur removal reaction was carried out, the rest of sulfur was nearly removed in this stage. Kinetics of the third stage were analyzed from the dynamic TGA data by means of Coats and Redfern equation. The nucleation and growth model yielded a satisfactory fit to these experimental data.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 49 (5), 1192-1198, 2008
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001204249711104
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- NII Article ID
- 10021147096
- 130004453972
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 9481028
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed