Decarburization Thermodynamics of High-Carbon Ferromanganese Powders During Gas-Solid Fluidization Process  

作　　者：GUO Li-na CHEN Jin ZHANG Meng LIANG Min 

机构地区：[1]College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

出　　处：《Journal of Iron and Steel Research International》2012年第5期1-8,共8页

基　　金：Item Sponsored by National Natural Science Foundation of China and Baosteel Group Corporation of China(50974149)

摘　　要：Thermodynamic conditions of reactions between high-carbon ferromanganese powders and gas decarbonizers like O2, CO2 and water vapor were studied by thermodynamic calculation. In O2, CO2 and water vapor atmosphere, high-carbon ferromanganese powders were decarburized in a fluidized bed. When the temperature is respectively higher than 273, 1 226 and 1 312 K, the gas-solid decarburization reaction will occur between ferromanganese carbide on the surface of the high-carbon ferromanganese powders and different gas decarbonizers. Since metal manganese is easy to be oxidized by O2, CO2 or water vapor, the decarburization reaction will transfer into a solid-solid phase reaction of ferromanganese carbide and ferromanganese oxide, promoting external diffusion of carbon to achieve a further decarburization of high-carbon ferromanganese powders.Thermodynamic conditions of reactions between high-carbon ferromanganese powders and gas decarbonizers like O2, CO2 and water vapor were studied by thermodynamic calculation. In O2, CO2 and water vapor atmosphere, high-carbon ferromanganese powders were decarburized in a fluidized bed. When the temperature is respectively higher than 273, 1 226 and 1 312 K, the gas-solid decarburization reaction will occur between ferromanganese carbide on the surface of the high-carbon ferromanganese powders and different gas decarbonizers. Since metal manganese is easy to be oxidized by O2, CO2 or water vapor, the decarburization reaction will transfer into a solid-solid phase reaction of ferromanganese carbide and ferromanganese oxide, promoting external diffusion of carbon to achieve a further decarburization of high-carbon ferromanganese powders.

关 键 词：gas-solid fluidization high carbon ferromanganese powders gas decarbonizer solid-phase decarburization 

分 类 号：TQ63[化学工程—精细化工] TF642[冶金工程—钢铁冶金]