| 传统加热和微波加热下氧化锰矿的碳热还原行为研究 |
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| 作者单位： | 1)Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China |
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| 基金项目： | This work was financially supported by the National Nat-ural Science Foundation of China |
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| 摘 要： | For the purpose of exploring a potential process to produce FeMn, the effects of microwave heating on the carbothermal reduction characteristics of oxidized Mn ore was investigated. The microwave heating curve of the mixture of oxidized Mn ore and coke was analyzed in association with the characterization of dielectric properties. The comparative experiments were conducted on the carbothermal reductions through conventional and microwave heatings at temperatures ranging from 973 to 1373 K. The thermogravimetric analysis showed that carbothermal reactions under microwave heating proceeded to a greater extent and at a faster pace compared with those under conventional heating. The metal phases were observed in the microstructures only under microwave heating. The carbothermal reduction process under microwave heating was discussed. The electric and magnetic susceptibility differences were introduced into the thermodynamics analysis for the formation of metal Mn. The developed thermodynamics considered that microwave heating could make the reduction of MnO to Mn more accessible and increase the reduction extent.
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| 关 键 词： | ,,,,,,,,, |
Carbothermal reduction characteristics of oxidized Mn ore through conven-tional heating and microwave heating |
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| Authors: | Yang He Jian Liu Jian-hua Liu Chun-lin Chen Chang-lin Zhuang |
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| Abstract: | For the purpose of exploring a potential process to produce FeMn, the effects of microwave heating on the carbothermal reduction characteristics of oxidized Mn ore was investigated. The microwave heating curve of the mixture of oxidized Mn ore and coke was analyzed in association with the characterization of dielectric properties. The comparative experiments were conducted on the carbothermal reductions through conventional and microwave heatings at temperatures ranging from 973 to 1373 K. The thermogravimetric analysis showed that car-bothermal reactions under microwave heating proceeded to a greater extent and at a faster pace compared with those under conventional heat-ing. The metal phases were observed in the microstructures only under microwave heating. The carbothermal reduction process under mi-crowave heating was discussed. The electric and magnetic susceptibility differences were introduced into the thermodynamics analysis for the formation of metal Mn. The developed thermodynamics considered that microwave heating could make the reduction of MnO to Mn more ac-cessible and increase the reduction extent. |
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| Keywords: | carbothermal reduction manganese ore manganese oxides microwave heating thermodynamics electromagnetic fields |
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