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| Flash Pyrolysis of Pulverized Injection Coal at Handan Steel Co |
| LIU Ran1,GAO Yong-liang1,WANG Xing-juan1,L Qing1,DU Lin-sen2,WANG Zhu-min2 |
1. College of Metallurgy and Energy, Hebei Key Laborary for Advanced Metallurgy Technology, Hebei United University, Tangshan 063009, Hebei, China
2. Handan Iron and Steel Co. Ltd. Hebei Iron and Steel Group， Handan 056000， Hebei， China |
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Abstract Aimed at increasing pulverized coal injection at Handan Steel, the pyrolysis of coal in raceway was simulated. The coal of CL and DW were selected and the decomposition rate was calculated by plasma pyrolysis. Gas products were analyzed by gas chromatography and morphology of residues were observed by scanning electron microscopy (SEM). The results show that CL and DW decomposition rate is 43.10% and 52.04% respectively and gas products of coal after plasma pyrolysis, which are different from general pyrolysis, consist of CO, H2, CH4, C2H2 and small content of C2H4, etc. Pyrolysis product has changed evidently, particle size become smaller. The vesicular structure occurs in coal grains when DW is added in the sample, which makes the specific surface area of coal grain increase. The solid carbon combustion ratio in tuyeres can be enhanced, which will provide the theoretical basis for pulverized coal combustion rate.
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Received: 23 May 2011
Published: 20 February 2012
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2012, Vol. 47 
