CO 2 injection into blast furnace tuyeres is a new technology to utilize CO 2 , aiming at expanding the way of CO 2 self-absorption in the metallurgical industry. The decisive factor of whether CO 2 can be mixed into a blast-furnace hot blast and the proper mixing ratio is the effect of CO 2 injection on pulverized coal burnout. To investigate the effect of CO 2 injection into tuyeres on pulverized coal burnout, a three-dimensional mathematical model of pulverized coal flow and combustion in the lower part of the pulverized coal injection lance-blowpipe-tuyere-raceway was established, and the effect of CO 2 injection into tuyeres on pulverized coal combustion rate and outlet temperature is analyzed. The numerical simulation results show that the delay of pulverized coal combustion in the early stage is caused by the endothermic effect of the reaction of CO 2 with carbon, and the burnout of pulverized coal is increased in the later stage due to the oxidation of CO 2 .

中文翻译：

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高炉风口注入二氧化碳对煤粉燃烧的影响

向高炉风口注入CO 2是一种利用CO 2的新技术，旨在扩展冶金行业中CO 2自吸收的方式。CO 2是否可以混入高炉热风中的决定性因素以及适当的混合比例是注入CO 2对煤粉燃尽的影响。为了研究鼓风口注入CO 2对煤粉燃尽的影响，建立了煤粉喷射喷枪-吹管-风口-烟道下部的煤粉流动和燃烧的三维数学模型，并计算了分析了煤粉燃烧速率和出口温度对风口注入CO 2的影响。