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| Decarburization Thermodynamics of High-Carbon Ferromanganese Powders During Gas-Solid Fluidization Process |
| GUO Li-na,CHEN Jin,ZHANG Meng,LIANG Min |
| College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China |
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Abstract 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, 1226 and 1312 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.
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Received: 15 March 2011
Published: 29 May 2012
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2012, Vol. 19 
