Experiment study on airflow affected to generation of CO with low temperature oxidation of coal
Deng Jun
Deng Yin
Zhang Yutao
Wang Caiping
Abstract：In order to study the airflow affected to the low temperature oxidized spontaneous combustion process of coal,a programmed temperature rising method was applied to the coal temperature control under the condition of the constant temperature.With the means to steadily reduce the airflow,the variation law of absolute yield of CO with coal temperature and airflow was compared,and the equivalent airflow at different coal temperature was determined.According to the variation of CO increased rate,the critical temperature of the coal spontaneous combustion was determined.With the theoretical analysis and experinent study,based on the absolute yield of CO,in combination with the mine airflow,the expression formula of the coal activated energy was derived and the relational expression between the coal temperature,absolute yield of CO,airflow and activated energy was obtained.The study results showed that the absolute yield of CO would be increased with the mine airflow increased.When the equivalent airflow was exceeded,the absolute yield of CO would be kept in constant basically.The higher the coal temperature was,the greater the equivalent airflow required by coal spontaneous combustion.The study would have important significances to deep probe the coal spontaneous combustion mechanism and to the site guidance of the coal spontaneous combustion prevention and control.
Keywords：absolute yield of COair flowlow temperature oxidizationspontaneous combustionactivated energy
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 70-74 )