As a novel method for blast furnace ironmaking, CO₂ is utilized in the hot blast and the pulverized coal carrier gas. In order to clarify the function mechanism of CO₂/O₂ oxidizing atmospheres on the metallurgical reaction of metallurgical coke and anthracite, the combustion characteristics of anthracite and coke in CO₂/O₂ atmosphere were obtained by non-isothermal thermogravimetry. The physical and chemical structural characteristics of anthracite and coke were measured systematically by using X-ray diffraction(XRD), X-ray fluorescence spectrometer (XRF), laser particle size analysis, scanning electron microscopy(SEM) and Raman spectroscopy analysis. The results show that when the proportion of CO₂ in the reaction gas increases, the ignition performance and comprehensive combustion performance of anthracite and coke decrease, and higher heating rate is not conducive to the reaction. The ignition performance and the comprehensive combustion performance of the samples rank in the order anthracite > coke. The volume model (VM) and unreacted core model(URCM) were used to fit the experimental data, and the reaction kinetic parameters and combustion reaction mechanism were obtained. The performance of VM model is slightly better than URCM model.

作为一种新的高炉炼铁方法，CO ₂被用于热风和煤粉载气。为阐明CO ₂ /O ₂氧化气氛对冶金焦与无烟煤冶金反应的作用机理，采用非等温热重法获得无烟煤和焦炭在CO ₂ /O ₂气氛中的燃烧特性。采用X射线衍射(XRD)、X射线荧光光谱仪(XRF)、激光粒度分析、扫描电子显微镜(SEM)和拉曼光谱分析等方法系统地测定了无烟煤和焦炭的理化结构特征。结果表明，当CO的比例₂反应气中增加，无烟煤和焦炭的着火性能和综合燃烧性能下降，升温速率过高不利于反应。样品的点火性能和综合燃烧性能按无烟煤>焦炭的顺序排列。采用体积模型(VM)和未反应堆芯模型(URCM)对实验数据进行拟合，得到反应动力学参数和燃烧反应机理。VM 模型的性能略好于 URCM 模型。