This study proposes a new technology in which waste tire powders are injected into a converter vaporization cooling flue for gas recovery via pyrolysis using high-temperature waste heat. The higher temperature pyrolysis behavior of waste tire powder under different heating rates was investigated using a TG-MS technique. A drop tube furnace was used to simulate the converter vaporization cooling flue to investigate the effect of high temperatures on waste tire powder pyrolysis. The results indicated that secondary pyrolysis occurred above 900 °C with low weight and weight loss rates, which were considerably lower than those observed in the thermal degradation stage. The main gaseous products formed were CO, CO₂, H₂, CH₄, and H₂O. The drop tube furnace experimental results indicated that high temperatures can facilitate the degradation of waste tire powder to generate more H₂ and CO and improve the low heating values. At 1200 °C, the H₂ and CO contents were approximately 19.60% and 4.90%, respectively. The low heating value was 29.64 MJ/Nm³. The char yield was in the range of 32.67%–37.33%; the fixed carbon content increased from 79.63% to 84.75%. The results provide preliminary verification of the feasibility of injecting waste tire powders into a converter vaporization cooling flue for gas recovery.

本研究提出了一种新技术，将废轮胎粉末注入转炉汽化冷却烟道，利用高温废热通过热解进行气体回收。使用TG-MS技术研究了不同加热速率下废轮胎粉末的高温热解行为。使用降管炉模拟转炉汽化冷却烟道，研究高温对废轮胎粉热解的影响。结果表明，二次热解发生在 900 °C 以上，重量和重量损失率较低，远低于热降解阶段观察到的情况。形成的主要气态产物为CO、CO ₂、H ₂、CH ₄和H ₂O.滴管炉实验结果表明，高温可以促进废轮胎粉的降解，产生更多的H ₂和CO，改善低热值。在 1200 °C 时，H ₂和 CO 含量分别约为 19.60% 和 4.90%。低热值为29.64 MJ/Nm ³。焦炭产率在 32.67%~37.33% 之间；固定碳含量从79.63%提高到84.75%。研究结果初步验证了将废轮胎粉末注入转炉汽化冷却烟道进行气体回收的可行性。