Carbothermal reduction characteristics of oxidized Mn ore through conventional heating and microwave heating
来源期刊:International Journal of Minerals Metallurgy and Materials2021年第2期
论文作者:Yang He Jian Liu Jian-hua Liu Chun-lin Chen Chang-lin Zhuang
文章页码:221 - 230
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 Mn O to Mn more accessible and increase the reduction extent.
Yang He1,2,Jian Liu3,Jian-hua Liu1,Chun-lin Chen2,Chang-lin Zhuang4
1. Institute of Engineering Technology, University of Science and Technology Beijing2. Commonwealth Scientific and Industrial Research Organisation3. Dongbei Special Steel Group Co., Ltd.4. College of Materials and Metallurgy, Guizhou University
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 Mn O to Mn more accessible and increase the reduction extent.
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