Theory Research Of Spontaneous Combustion Period Of Coal Based On Activation Energy Index

Nowadays, there are many methods on studying spontaneous combustion period in our country, but because of many influence factors, there are a great differences between computed results and actual results on researching spontaneous combustion period. So it can't be used in instructing actual work and practice. And seeking for a more scientific and accurate method on studying spontaneous combustion period is very important. This article is mainly on studying 2 coal samples with different spontaneous combustion periods, with the following researches: (1) By doing natural oxidation under non-isothermal dynamics mechanism research, to acquire the dynamics parameters of coal activation energy with chemical reaction under low temperature oxidation process. (2) According to the speed of coal oxidation, doing the theory research on spontaneous combustion period based on activation energy with standard situation. This article presents that spontaneous combustion period depends on the speed of coal oxidation, and this speed is decided by environmental temperature, the density of oxygen, aeration capability and so on, namely, the oxidation speed is a variable and nonlinear function. Nevertheless, as long as knowing the activation energy parameters, and properly confirming some influencing factors by using some standards, the equation of the oxidation speed could be established uniquely. Then using Arrhenius equation to integral calculate the coal's calefactive , the time of the spontaneous combustion point is the spontaneous combustion period of coal. Therefore, the research methodologies regarding on coal spontaneous combustion period is not only feasible, but also scientific.