提出了一种利用高炉渣余热裂解废旧轮胎油气联产的新思路，将液态高炉渣经干法粒化制成的高温炉渣颗粒作为热载体，通过轮胎胶粉直接接触换热，胶粉颗粒在炉渣热载体的作用下迅速升温裂解，实现油气联产。对以高炉渣为热载体的轮胎胶粉裂解过程中的影响因素，包括裂解温度、高炉渣与胶粉当量比、胶粉粒径进行了研究，发现炉渣占比越高，颗粒间的热传递效果越好，在相同的固相停留时间内裂解反应进行得越彻底，裂解油收率越高，裂解残留物炭黑的产率则越低。减小胶粉粒径可以提高裂解产物中气体产率，但会造成裂解油和炭黑产率下降。在裂解温度为550℃，高炉渣与胶粉质量比为2：1时，裂解油收率最大，达到49.1%。

This paper proposes a new combination routine to carry out pyrolysis of waste tires by means of waste heat brought by blast furnace slag.The liquid blast furnace slag is made into high-temperature furnace slag particles through dry granulation method.The scrapped tire powder exchanges heat with slag particles via direct contact,and is rapidly heating up and cracking.The influencing factors in the pyrolysis process of scrapped tire powder by means of heat bringing blast furnace slag are studied,which include pyrolysis temperature,the mass ratio of blast furnace slag to tire powder,and the particles size of tire powder.It is found if the mass ratio of blast furnace to tire is larger,the heat transfer efficiency between slag particles and tire powders will be better,and the pyrolysis reaction will perform more complete during the same residence time of solid phase,as a result,the yield of oil from tire powder will be higher and less amounts of carbon black will be produced.The decrease of tire powder particles size is benefit to increase the gas yield among cracking products,whilst lead to the decrease of the yields of pyrolysis oil and carbon black.As the mass ratio of furnace slag to tire powder is 2:1 and the pyrolysis temperature is 550℃,the maximum oil yield 49.1% will be achieved.

胡春晓(1979-),女,硕士生,研究方向为固废热处理