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| Combustion Behavior of Low Rank Coal Char Application in Blast Furnace Injection |
| HE Xuan-ming, FU Peng-rui, WANG Chun-xia, LIN Hong-tao, WU Shuo, CAO Shi-xin |
| Hubei Coal Conversion and New Carbon Materials Key Laboratory， School of Chemical Engineering and Technology, Wuhan University of Science and Technology， Wuhan 430081， Hubei， China） |
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Abstract Using fixed bed pyrolysis apparatus preparation of co-pyrolysis coal char of Shenmu long-flame coal and water hyacinth and metallurgical industry wastes at final pyrolysis temperature of 450 and 550 ℃ respectively. Reaction of pulverized coal injection (PCI) in a blast furnace was simulated using a drop tube furnace (DTF) to investigate the burnout behavior of a number of co-pyrolysis coal char and the influence of final pyrolysis temperature and co-pyrolysis material on combustion behavior. The result shows that blast sludge and cold rolling iron oxide could catalytic coal pyrolysis, and blast sludge had the optimal catalytic effect, and the growth of volatile is 18.4%; the optimal burnout of co-pyrolysis coal char was coal and cold rolling iron oxide pyrolysis at final temperature 550 ℃; the burnout degrees increased by 22.5% compared with raw coal char which was prepared at the same final pyrolysis temperature; SEM results show that the coal co-pyrolysis with cold rolling iron oxide produced more crack on char surface; in addition to co-pyrolysis coal char of coal and iron slag of steel rolling and blast sludge, the various performance of co-pyrolysis coal char in this experiment were consistent with the Chinese injection coal indexes.
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Received: 10 February 2014
Published: 10 September 2014
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2014, Vol. 49 
