The combustion kinetics experiment of coal gangue is the same as (1) the experiment of pyrolysis characteristics of coal gangue, the difference is that four heating rates are used, which are 10 ℃ min-1, 20 ℃ min-1, 30 ℃ min-1 And 40 ℃ min-1, all experiments are repeated at least twice to ensure the repeatability of the experimental results