期刊
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
卷 26, 期 10, 页码 1247-1257出版社
SPRINGER
DOI: 10.1007/s12613-019-1846-1
关键词
blast furnace; coke; gasification kinetics; gas system
类别
资金
- National Key Research and Development Program of China [2017YFB0304300, 2017YFB0304303]
- National Science Foundation of China [51774032]
- Chinese Fundamental Research Funds for the Central Universities [FRF-TP-17-086A1]
The gasification characteristics and gasification kinetics of coke in complex CO2/CO/H-2/H2O/N-2 systems similar to the gas system of industrial blast furnace (BF) were studied by the method of isothermal thermogravimetric analysis. The experimental gas compositions and the corresponding temperature were chosen according to data reported for industrial BFs. The gasification behavior of coke was described by the Random Pore Model (RPM), Volumetric Model (VM), and Grain Model (GM). Results showed that the gas composition of the coke gasification zone in BF changes slightly and that the temperature is the most important factor affecting coke gasification. The lower activation energy of coke samples (Coke Reaction Index (CRI) > 50) is due to the high Fe2O3 in the ash, lower degree of graphitization, and larger pore structure. In addition, the choice of kinetic model does not differ substantially in describing the gasification mechanism of coke in a BF.
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