Carbothermal reduction characteristics of oxidized Mn ore through conven-tional heating and microwave heating

• 作者: Yang He Jian Liu Jian-hua Liu Chun-lin Chen Chang-lin Zhuang
• 来源期刊: 矿物冶金与材料学报
• 年，卷（期）: 2021,（2）
• 页码范围: 221-230
• 页数: 10页
• 语种: 英文

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 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.