Experimental Study on Characteristic Parameters of High-sulfur Coal Spontaneous Combustion in Secondary Oxidation
WEN Hu
LI Chenghui
FEI Jinbiao
WANG Kai
LI Haitao
Abstract：In order to solve the problems present in the prediction and prevention of coal spontaneous combustion in a second-mining coal face in the high-sulfur coal mine, contrast analysis was carried out on the characteristic parameters of the high-sulfur coal spontaneous combustion in the process of its initial and secondary oxidation by using the experimental method of programmed temperature-rise. The results showed that the oxygen consumption rate, the generation rate of CO and CO2 and the exothermic intensity of the high-sulfur coal were all increased at the low-temperature stage in the secondary oxidation as compared to that in the initial oxidation, but after the critical temperature, the reaction intensity of the secondary oxidation decreased, and the indicator gases of the secondary oxidation were different from that of the initial oxidation;FeS2 in high-sulfur coal had a certain impact on the oxygen adsorption of coal, the H+ produced in the initial oxidation played a catalytic role on coal-oxygen oxidation, and the reaction product was Fe( OH) 3;the colloid reduced the porosity of coal molecule and prevented the coal-oxygen compound reaction in the secondary oxidation. The experimental results provided data support for the prediction of high-sulfur coal spontaneous combustion in the second-mining coal face and the fire prevention after the closed face was unsealed.
Keywords：high-sulfur coalsecondary oxidationcharacteristic parameter of spontaneous combustionprogrammed temperature-risecoal-oxygen compound
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )