Experimental study on retardation of coal flame with polyvinyl acetate emulsioncomposite inhibitor

doi:10.16265/j.cnki.issn1003-3033.2018.09.008

Abstract

Abstract: The paper was aimed at exploring the performance of polymer composite inhibitors. A polyvinyl acetate emulsion was prepared and parts of the emulsion were compounded with magnesium chloride, ascorbic acid and magnesium aluminum layered double hydroxides(Mg/Al-LDHs) respectively to obtain three emulsion composite inhibitors. Five portions of a coal sample taken from the Zhaotong Coal Mine in Yunnan province were treated with the three inhibitors and two contrast inhibitors, clear water and magnesium chloride aqueous solution. Temperature programmed oxidation experiments were carried out on the five portions, and the inhibition effects of emulsion compound inhibitors and the contrast inhibitors were compared and analyzed. The results show that the inhibition effect of magnesium chloride emulsion composite inhibitor is better than that of magnesium chloride solution, that the inhibition rates and the values of activation energy of the three portions of the coal sample treated with the emulsion composite inhibitors are all improved, and that the inhibition effect of the hydrotalcite emulsion is optimal.

Key words: coal spontaneous combustion, composite inhibitor, inhibition rate, activation energy, oxygen consumption rate, heat liberation intensity

CLC Number:

X936

DU Jie, WU Jianming, TANG Yibo, WANG Junfeng. Experimental study on retardation of coal flame with polyvinyl acetate emulsioncomposite inhibitor[J]. China Safety Science Journal, 2018, 28(9): 45-50.

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