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Carbothermal reduction characteristics of oxidized Mn ore through conventional heating and microwave heating
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-06-15 , DOI: 10.1007/s12613-020-2037-9
Yang He , Jian Liu , Jian-hua Liu , Chun-lin Chen , Chang-lin Zhuang

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.



中文翻译:

常规加热和微波加热碳锰矿的碳热还原特性

为了探索潜在的生产FeMn的方法,研究了微波加热对氧化锰矿石碳热还原特性的影响。结合介电特性表征,分析了氧化锰矿和焦炭混合物的微波加热曲线。通过常规加热和微波加热在973至1373 K范围内对碳热还原进行了对比实验。热重分析表明,与常规加热相比,微波加热下的碳热反应进行的程度更大,速度更快。仅在微波加热下才在微观结构中观察到金属相。讨论了微波加热下的碳热还原过程。电和磁化率的差异被引入到热力学分析中以形成金属锰。发达的热力学认为微波加热可以使MnO还原为Mn更容易,并增加了还原程度。

更新日期:2020-06-15
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