Preventing Spontaneous Combustion of Coal From Damaging Ecological Environment Based on Thermogravimetric Analysis

As a global disaster, spontaneous combustion of coal leads to a series of problems, like atmospheric pollution and geological damage, which seriously affects the ecological environment. Therefore, protecting the environment through the prevention of the spontaneous combustion of coal is necessary and worthy of further study. The spontaneous combustion of coal could be characterized by thermogravimetric (TG) characteristics. Thus, the TG test was performed to study the characteristics of non-caking coal during spontaneous combustion. The results show that the combustion process of coal mainly includes loss of water and weight, oxidation, thermal decomposition, combustion and burnout. Both heating rate and oxygen concentration can affect the combustion reaction process of coal. Heating rate is positively correlated with the combustion reaction time, characteristic temperature and oxidation reaction rate of coal. The higher the oxygen concentration, the shorter the combustion reaction time, the lower the characteristic temperature, the higher the oxidation reaction rate. The research results can provide certain theoretical basis for preventing coal spontaneous combustion, and be helpful for the protection of atmospheric environment.