Oxidation and inhibition characteristic of coal with different deoxidization degree

Using thermal analyzer STA449C,six characteristics values of temperature of thermogravimetry curve that describe the oxidation and inhibition characteristic of coal were analyzed,and the oxidation and inhibition characteris-tic of four kinds of coals that has different degree of deoxidization and their inhibited coals that mix chemical inhibitor was studied. The results indicate that Yima coal have the highest critical temperature T1 and season check temperature T2,Quandian coal have the lowest T1 and T2; but Yima coal has the lowest accelerated temperature T3,ignition temper-ature T4,the most speed of weightlessness T5 and extinct temperature T6,Shangkong coal has the highest T4,T5,T6; In the early oxidized stage,for each coal,T2of the inhibited coal which have mixed inhibitor MgCl2 are the highest; In the later oxidized stage,for Shangkong coal and Quandian coal,T4,T5,T6 of the inhibited coals which has mixed antioxi-dant A are higher; for Yangquan coal,T4,T5,T6 of the natural coal and its three kinds of inhibited coals are close; for Yima coal,T4,T5,T6 of the inhibited coal which have mixed MgCl2 are higher. The research shows that the coal which have different degree of deoxidization have different oxidization and inhibition characteristic. Form easy to difficult,the oxidizability of four kinds of coals is: Yima coal,Yangquan coal,Quandian coal,Shangkong coal; Shangkong coal and Quandian coal which are difficultly oxidated are appropriate to be inhibited by compound inhibitor MgCl2-antioxidant A,Yima jet coal is relatively easily oxidized and the single inhibitor MgCl2 is more appropriate for it to be inhibited.