Test and Analysis on Salty Retardants Performance to Restrain Coal Oxidized Spontaneous Combustion

Abstract

In order to further research and develop high efficient retardants to restrain the coal spontaneous combustion,Dongshan coal sample and Furong coal sample individually were applied to the program temperature increasing test under the different retardants added.During the 40 to 150 ℃ increasing process,comparison analysis was conducted on the carbon monoxide production from the different coal samples and the retarding results of the retardant to the different coal samples were obtained.The results showed that the retarding rate of the NH4HCO3 and MgCl2 for the Dongshan coal samples could be over 88% and in the different temperature increasing processes of the Furong coal samples,the retarding rate of the(NH4)H2PO4 and(NH4)HCO3 would be all over 75%.At the different temperature stage of the coal samples,mass fraction 20% of the retardant would have the optimized retarding result.The test results could provide the related references and basis to the preparation of the high efficient retardants.