Study on Surfactant Wettability for Coal Dust

Study was made on the wettabilty of defferent surfacants to coal dust with sedimentation method, and the study results showed that adding surfacant into water can significantly improve the wetting efficiency of coal dust. It was found in experiments that the type and concentration of the surfacants and the nature of coal dust itself were the main factors affcting the wetting efficiency of coal dust. Measurements were made on the surface tensions of the surfacants having better wettability, and their surface tensions were all lower than 45 mN/m of the critical wetting tension value. Industrial tests indicated that adding surfacant into waater spray was an effective measure for dust suppression. This study result provided a technical base for the development of the new and high-efficient chemical dust suppression agent.