Improving the combustion efficiency of fuels is essential to reducing pollutant emissions in the iron ore sintering process. The sintering bed surface steam-injection technology has attracted significant research interest for its potential advantages in low-energy consumption and low emission. The effect of steam injection on fuel combustion efficiency and CO emission was studied by comparing the thermodynamic response from the sintering process before and after steam injection. The mechanism of improving combustion efficiency was also revealed. The results indicated that the sintering gas medium of H₂O–H₂–N₂–O₂ with the blown steam improved the heat transfer conditions of fuel combustion and promoted the water gas reaction. The optimum state of steam injection was achieved at 15 min after ignition with 0.02 m³ min⁻¹. The CO emission reduction is 10.91% compared with the base case. The combustion efficiency was 88.83%, 6.15% higher than conventional sintering, and the solid fuel consumption was reduced by 1.15 kg t⁻¹. It was indicated that steam injection would improve combustion efficiency and reduce solid fuel consumption. Meanwhile, the steam injection could improve the combustion kinetic conditions in the zone of unburned fuel and low oxygen partial pressure. It was conducive to the reaction of H₂O with C and CO to convert the CO of reducing atmosphere to CO₂, which in turn realized the complete combustion of fuel and CO and improved the efficiency of fuel combustion.

提高燃料的燃烧效率对于减少铁矿石烧结过程中的污染物排放至关重要。烧结床表面蒸汽喷射技术以其低能耗、低排放的潜在优势引起了广泛的研究兴趣。通过比较蒸汽喷射前后烧结过程的热力学响应，研究了蒸汽喷射对燃料燃烧效率和 CO 排放的影响。还揭示了提高燃烧效率的机理。结果表明，H ₂ O–H ₂ –N ₂ –O _{2的烧结气体介质}吹出的蒸汽改善了燃料燃烧的传热条件，促进了水煤气反应。^{在以 0.02 m 3}  min ^-1点火后 15 分钟达到蒸汽喷射的最佳状态。与基准情况相比，CO 排放量减少了 10.91%。燃烧效率为88.83%，比常规烧结提高6.15%，固体燃料消耗降低1.15 kg t ^-1。表明蒸汽喷射将提高燃烧效率并降低固体燃料消耗。同时，蒸汽喷射可以改善未燃烧燃料和低氧分压区的燃烧动力学条件。有利于H _2的反应O与C和CO将还原气氛中的CO转化为CO ₂，​​进而实现燃料和CO的完全燃烧，提高燃料燃烧效率。