With the development of automobile industry technology, the production of waste tires (WTs) has been increasing rapidly, resulting in serious environmental damage and great treatment pressure. In this work, co-combustion of WT and coal under different mixing ratios were investigated to figure out the thermal property and heavy metals (HMs) migration in thermal treatment process. Besides, the chemical composition and leachability of ash samples were investigated. The results revealed that the addition of WT reduced the ignition temperature of the blend. Comprehensive combustion index (CCI) was higher than mono-combustion of coal and theoretical value with adding 20% WT, indicating there existed the synergistic effect between two fuels. Compared with coal ash, WT ash performed lower volatilization ratios of Zn, Cu, Ni and Cr. Furthermore, the volatilization of Cr/Ni decreased with the addition of WT. According to the comparison between theoretical and experimental values of Zn volatilization ratio, the Zn volatilization was promoted. However, there still had large amount of Zn fixed in ash to form minerals in co-combustion. In addition, leachability of both Zn and Cu and mixing ratio presented positive correlation. Leachability of both Cr and Ni in co-combustion ash were higher than that of mono-combustion ash.

随着汽车工业技术的发展，废旧轮胎（WTs）的产生量迅速增加，造成了严重的环境破坏和巨大的处理压力。在这项工作中，研究了不同混合比下 WT 和煤的混合燃烧，以确定热处理过程中的热性能和重金属 (HMs) 迁移。此外，还研究了灰分样品的化学成分和可浸出性。结果表明，加入WT降低了混合物的着火温度。综合燃烧指数（CCI）高于单燃煤和理论值，加入20%WT，表明两种燃料之间存在协同效应。与煤灰相比，WT 灰的 Zn、Cu、Ni 和 Cr 的挥发率较低。此外，随着WT的加入，Cr/Ni的挥发减少。根据Zn挥发比的理论值与实验值的比较，促进了Zn的挥发。然而，仍有大量的锌固定在灰烬中，在混燃中形成矿物质。此外，锌、铜的浸出率与混合比呈正相关。混燃灰中Cr和Ni的浸出率均高于单燃灰。