Characterization factors of coal spontaneous combustion were diverse and different. Correlativity between indexes of coal spontaneous combustion critical temperature with low temperature oxidation was studied.Based on temperature-programmed experiment and isola- ted heat oxidation experiment, the paper determined five critical temperature indexes TJ、TO2、TCO、TC2H4 and TC2H6. The indexes value of seven coal samples were calculated through formula reasoning and linear fitting.The correlation analysis and cluster analysis were used to analyze relevance between various indexes.The results showed that the indexes could reflect critical temperature from different aspects, crit- ical temperatures of different coal samples with low temperature oxidation were different.The variation tendency of TJ、TO2、TCO and TC2H4 were the same and had high correlativity, while. TC2H6 had poor correlativity with other indexes, the characterization effects was non-ideal.
Coal Science and Technology
critical temperature indexes
isolated heat oxidation experiment
correlativity between indexes