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由于进一步扩大喷煤量受到风口前煤粉燃烧不完全的限制,作者设计了一套直接从生产高炉风口回旋区取出燃烧过程煤粉试样的取样装置。通过取样,研究了煤粉在风口回旋区的燃烧程度及变化规律。用模拟高炉风口回旋区条件的燃烧炉,系统地研究了对煤粉燃烧的影响因素,包括采用旋流的作用。还用煤岩相方法研究了煤粉结构在燃烧过程的变化。用传热传质及反应动力学理论分析并计算了煤粉的加热速度及燃烧反应速度,讨论了一些因素对它们的作用,从而提出了扩大高炉喷煤量,改善喷煤效果的措施和建议。
Due to the incomplete expansion of pulverized coal injection volume due to incomplete combustion of pulverized coal before tuyere, the author designed a sampling device for directly removing pulverized coal from combustion blast furnace tuyere area. By sampling, the combustion degree and variation of pulverized coal in tuyere raceway were studied. The influence factors of pulverized coal combustion, including the effect of swirling flow, were systematically studied in a combustion furnace simulating blast furnace tuyere area conditions. Coal-rock facies has also been used to study the changes in the pulverized coal combustion process. The heat transfer, mass transfer and reaction kinetics were used to analyze and calculate the heating rate and combustion reaction speed of coal powder. The effects of some factors on them were discussed. The measures and suggestions for expanding coal injection volume and improving coal injection efficiency were put forward .