Highly reactive ferro-coke has been widely studied due to its contribution to the energy saving and emission reduction in blast furnace ironmaking. To optimize the coking process of ferro-coke and improve its metallurgical properties, it is necessary to clarify the influence of initial iron ore on the strength, micro-morphology and CO₂ gasification reaction behavior of formed ferro-coke. The effects of initial iron ore particle size (0.50–1.00, 0.25–0.50 and 0.074–0.125 mm) on the CO₂ gasification reaction of ferro-coke were analyzed using thermo-analysis technique. In addition, the effects of initial iron ore particle size on the strength and morphology of ferro-coke were investigated by drum test, digital microscopy and scanning electron microscopy. The results show that iron reduced from iron ore has a great promotion effect on the CO₂ gasification reaction of ferro-coke. The smaller the particle size of initial iron ore, the more intense the gasification reaction, and the lower the starting temperature for gasification reaction of ferro-coke. The results of kinetic calculation show that the apparent activation energy of ferro-coke decreases with the decreasing particle size of blended iron ore. The particle size of initial iron ore has a great impact on the strength of ferro-coke. The ferro-coke prepared by 0.25–0.50 mm iron ore presents the best strength in this experiment.

由于高反应性铁焦炭对高炉炼铁的节能减排具有重要作用，因此已被广泛研究。为了优化铁焦的焦化工艺并改善其冶金性能，有必要弄清初始铁矿石对所形成的铁焦的强度，微观形貌和CO ₂气化反应行为的影响。初始铁矿石粒径（0.50–1.00、0.25–0.50和0.074–0.125 mm）对CO _2的影响采用热分析技术分析了焦炭的气化反应。此外，通过鼓式试验，数字显微镜和扫描电子显微镜研究了初始铁矿石粒度对铁焦强度和形态的影响。结果表明，铁矿石还原铁对CO _2的促进作用强。焦炭的气化反应。初始铁矿石的粒径越小，气化反应越剧烈，并且铁焦气化反应的起始温度越低。动力学计算结果表明，随着混合铁矿石粒径的减小，铁炭的表观活化能降低。初始铁矿石的粒径对铁焦的强度影响很大。在此实验中，由0.25-0.50毫米铁矿石制备的铁焦具有最佳的强度。