Influence Factors of Wettability of Coal Sample in Liupanshui, Guizhou

In order to study the effect of coal wettability on coal dust in the mining, taking Liupanshui raw coal in Guizhou as the research object, and selecting the surfactants ASA-1 and ASA-2 as experimental materials. The JC2000DM contact angle measuring instrument was used to study the influence of pH value, salinity and temperature on the contact angle of coal sample. The results showed that: the contact angle of coal sample increased first and then decreased with the increase of pH value; KCl had an effect on enhancing the hydrophilicity of coal sample; for the samples soaked in the ASA-1 and ASA-2, the contact angle increased with the increase of solution temperature.