有机磷系阻燃剂对煤自然发火的阻化研究
Study on Retarding of Organic Phosphorus Flame Retardant on Coal Spontaneous Combustion
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摘要: 煤自燃事故是造成目前煤矿事故的重要原因，为了减少该类事故的发生，对煤进行阻化处理是有必要的。研究选用东欢坨矿煤样为原料，添加有机磷系阻燃剂进行阻化实验，利用程序升温-气相色谱联用技术对阻化效果进行分析。结果显示，苯基次膦酸浓度为30%、2-羧乙基苯基次膦酸浓度为8%、甲基膦酸二甲酯的浓度15%时，阻燃剂的效果最好。通过对最优阻化效果的样品进行CO指标气体、阻化率、O2浓度及乙烯指标气体等参数分析，认为对东欢坨煤阻化效果最好的是苯基次膦酸，浓度为30%。Abstract: Coal spontaneous combustion accident is an important cause of the current coal mine accidents. In order to reduce the occurrence of such accidents, it’s necessary to carry out resistance processing of coal. This research selects the coal samples from Donghuantuo Mine as raw material for resistance experiments of adding organic phosphorus flame retardant, and uses temperature programmed gas chromatography hyphenated technique to analyze the resistance effect. The results showed that the flame retardant effect is the best when the phenyl phosphinic acid, 2-carboxethyl phenyl phosphinic acid, as well as the dimethyl methylphosphonate concentration is 30 wt.%, 8 wt.% and 15 vol.% respectively. Through the parameters analysis （CO index gas, inhibition rate, O2 concentration and ethylene index gas） of the samples with the optimum resistive effect, it is considered that the best inhibition effect of the Donghuantuo coal is phenyl phosphinic acid with the concentration of 30 wt.%.
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