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| Pulverized Coal Combustion of Nitrogen Free Blast Furnace |
| ZHANG Jian-liang,WANG Guang-wei,SHAO Jiu-gang,CHEN Yong-xing,YANG Tian-jun |
| School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract The efficiency of coal combustion is an important factor for the blast furnace process. The influence of low xO/xC on coal combustion performance under nitrogen free blast furnace condition was researched through the self-developed pulverized coal burning device. The results show that the coal combustion rate reduces with xO/xC decreasing, and the combustion rate of bituminous coal is higher than that of anthracite. The coal combustion rate ascends with the rise of volatile matter, but when volatile matter of pulverized coal is more than 18%, the combustion rates will not increase correspondingly. Small amount of CaCO3 and CO2 additions can promote coal combustion, and the effect of CaCO3 is more apparent, which can increase the pulverized coal combustion rate by 15%-18% or so.
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Received: 02 November 2011
Published: 02 April 2013
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Corresponding Authors:
Guan-Mwei WANG
E-mail: wang_gw1986@163.com
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2013, Vol. 20 
