A new method of coal gasification with steelmaking slag as heat carrier and catalyst is put forward. At the same time, from the carbon cycle perspective, CO₂ is used as a gasification agent instead of water vapor. The effects of coal type, slag ratio, and experimental temperature on coal gasification reaction were discussed through constant temperature thermogravimetry, heating thermogravimetry experiments, and the kinetic analysis of thermogravimetry data carried out. The results show that steelmaking slag has a catalytic effect on coal gasification reaction, which is beneficial to coal gasification reaction, but the additional amount of slag has a suitable value. Because low-rank coal contains more oxygen-containing functional groups, the catalytic effect of slag on low-rank coal is stronger. The gasification reaction temperature should be controlled near the ash melting point temperature of coal. At the same time, the kinetic parameters of coal gasification reaction under different conditions were obtained, and the kinetic mechanism model was constructed. This study is of great significance to the recovery and utilization of waste heat of steelmaking slag and the emission reduction of greenhouse gases.

提出了一种以炼钢渣为热载体和催化剂的煤气化新方法。同时，从碳循环的角度来看，CO ₂用作气化剂而不是水蒸气。通过恒温热重实验、加热热重实验和热重数据动力学分析，探讨了煤种、渣比、实验温度对煤气化反应的影响。结果表明，炼钢炉渣对煤气化反应有催化作用，有利于煤气化反应，但炉渣的添加量有适宜的值。由于低阶煤含有较多的含氧官能团，因此炉渣对低阶煤的催化作用更强。气化反应温度应控制在煤的灰熔点温度附近。同时，得到了不同条件下煤气化反应的动力学参数，并建立了动力学机理模型。该研究对炼钢渣余热回收利用和温室气体减排具有重要意义。