Combustion characteristics and kinetic analysis of co-combustion between bag dust and pulverized coal
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第12期
论文作者：Tao Xu Xiao-jun Ning Guang-wei Wang Wang Liang Jian-liang Zhang Yan-jiang Li Hai-yang Wang Chun-he Jiang
文章页码：1412 - 1422
摘 要：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 5 wt% to 10 wt%, the activation energy of combustion reactions decreased from 68.50 to 66.74 k J/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.
Tao Xu1，Xiao-jun Ning1，Guang-wei Wang1，Wang Liang1，Jian-liang Zhang1,2，Yan-jiang Li1，Hai-yang Wang1，Chun-he Jiang1
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing2. School of Chemical Engineering, The University of Queensland
摘 要：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 5 wt% to 10 wt%, the activation energy of combustion reactions decreased from 68.50 to 66.74 k J/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.
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