Combustion characteristics and kinetic analysis of co-combustion between bag dust and pulverized coal

Tao Xu; Xiao-jun Ning; Guang-wei Wang; Wang Liang; Jian-liang Zhang; Yan-jiang Li; Hai-yang Wang; Chun-he Jiang

doi:10.1007/s12613-018-1695-3

Volume 25 Issue 12

Dec. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(12): 1412-1422

Tao Xu, Xiao-jun Ning, Guang-wei Wang, Wang Liang, Jian-liang Zhang, Yan-jiang Li, Hai-yang Wang, and Chun-he Jiang, Combustion characteristics and kinetic analysis of co-combustion between bag dust and pulverized coal, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1412-1422. https://doi.org/10.1007/s12613-018-1695-3

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Tao Xu, Xiao-jun Ning, Guang-wei Wang, Wang Liang, Jian-liang Zhang, Yan-jiang Li, Hai-yang Wang, and Chun-he Jiang, Combustion characteristics and kinetic analysis of co-combustion between bag dust and pulverized coal, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1412-1422. https://doi.org/10.1007/s12613-018-1695-3

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Research Article

Combustion characteristics and kinetic analysis of co-combustion between bag dust and pulverized coal

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Corresponding authors:
Xiao-jun Ning E-mail: ningxj@ustb.edu.cn

Guang-wei Wang E-mail: wgw676@163.com
Received: 15 May 2018; Revised: 1 July 2018; Accepted: 9 July 2018

Abstract

Abstract

The combustion characteristics of blast furnace bag dust (BD) and three kinds of coal-Shenhua (SH) bituminous coal, Pingluo (PL) anthracite, and Yangquan (YQ) anthracite-were obtained via non-isothermal thermogravimetry. The combustion characteristics with different mixing ratios were also investigated. The physical and chemical properties of the four samples were investigated in depth using particle size analysis, Scanning electron microscopy, X-ray diffraction, X-ray fluorescence analysis, and Raman spectroscopy. The results show that the conversion rate of the three kinds of pulverized coals is far greater than that of the BD. The comprehensive combustion characteristics of the three types of pulverized coals rank in the order SH > PL > YQ. With the addition of BD, the characteristic parameters of the combustion reaction of the blend showed an increasing trend. The Coats-Redfern model used in this study fit well with the experimental results. As the BD addition increased from 5wt% to 10wt%, the activation energy of combustion reactions decreased from 68.50 to 66.74 kJ/mol for SH, 118.34 to 110.75 kJ/mol for PL, and 146.80 to 122.80 kJ/mol for YQ. These results also provide theoretical support for the practical application of blast furnace dust for blast furnace injection.
- thermogravimetric;
- bag dust;
- characteristic parameters;
- combustion properties;
- kinetic model

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