Abstract
To improve the wettability of coal, a combination of nonionic and anionic surfactants was used to improve the dust removal efficiency of water spray. The sedimentation test shows that the dust suppressant solution prepared by SDBS, DSS and CDEA has a good wetting effect on coal dust. The results show that the effect of a SDBS:DSS:CDEA ratio of 3:1:12 on the wettability of coal is stronger than that of other allocation methods. FTIR was used to explore the changes in the functional groups of experimental coal samples treated with different concentrations of new dust suppressants. With the FTIR results, a correlation analysis between sedimentation time and functional groups was carried out. In addition, the mechanism of the gas-liquid interface and solid-liquid interface in the coal dust adsorption process was analysed.
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