高炉喷吹兰炭的最佳配比

doi:10.13228/j.boyuan.issn0449-749x.20190382

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摘要为探究高炉喷吹兰炭的最佳配比,使用TG-DTG热分析技术研究了百善无烟煤、神华烟煤和兰炭组成混煤的燃烧特性。结果表明,混煤中兰炭配比量增加可以降低煤粉的着火温度与燃尽温度,缩短燃烧时间,提高综合燃烧特性指数,改善混煤燃烧性;升温速率增大,混煤反应速率峰值升高,综合燃烧特性指数升高,混煤燃烧性得到优化。使用KAS等转化率法分析了不同混煤方案的燃烧过程动力学,当兰炭配比量由0增加至40%时,活化能分别为115.25、113.03、112.22、108.20 和104.53 kJ/mol,兰炭的加入可以降低混煤的表观活化能。

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	毕传光
	黄椿朝
	宁晓钧
	张建良
	王广伟
	彭政富

关键词 ：热重分析, 燃烧性, 兰炭, 动力学

Abstract：In order to explore the best ratio of the semi-coke injection in blast furnace, the combustion performance of the mixed coal consisting of Baishan anthracite, Shenhua bituminous, and the semi-cokeby were studied using thermogravimetry analytical technology. The results showed that with the increase of semi-coke content, ignition temperature and burnout temperature of blends tended to decrease, while the time of combustion and the combustibility index increased.With the increase of heating rate, peak reaction rate, mean reaction rate, and combustion characteristic index all increased. The combustion process dynamics of mixed coal under different schemes were analyzed using the conversion rate method of KAS. With the increase of semi-coke content was increased from 0 to 40%, the activation energy were 115.25, 113.03, 112.22, 108.20, and 104.53 kJ/mol, respectively. The addition of semi-coke can reduce the apparent activation energy of blends.

Key words： thermogravimetry analytical technology combustion semi-coke kinetic analysis

收稿日期: 2019-08-19

引用本文:

毕传光, 黄椿朝, 宁晓钧, 张建良, 王广伟, 彭政富. 高炉喷吹兰炭的最佳配比[J]. 钢铁, 2020, 55(6): 25-32. BI Chuan-guang, HUANG Chun-chao, NING Xiao-jun, ZHANG Jian-liang, WANG Guang-wei, PENG Zheng-fu. Best ratio of semi-coke for blast furnace injection. Iron and Steel, 2020, 55(6): 25-32.

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