In recent years, with the increasin

In recent years, with the increasing attention to the utilization of coal-based solid waste, the Ran Jingyi group of Chongqing University has used a non-isothermal thermogravimetric method to study the pyrolysis characteristics and pyrolysis kinetic mechanism of coal gangue. The pyrolysis process is a complex process consisting of three stages of low-temperature weightlessness, main thermal decomposition and secondary degassing. The pyrolysis kinetic mechanism needs to be described in stages. The initial stage of pyrolysis follows the dimensional sphere diffusion model. Increased, controlled by the liquefaction reaction, subject to the chemical reaction model of order 2. When the temperature is further increased, the third stage of pyrolysis will be affected by the coal type. Coal gangue with high carbon content is subject to the chemical of order 2. Reaction model, and coal gangue with low carbon content is subject to the chemical reaction model of order 1