Development of High‐Temperature‐Resistant Dust Suppressant for Railway Coal Transportation

Abstract This study develops a high‐temperature‐resistant dust suppressant (HTRDS) for railway coal transportation: 0.2 % XG, 0.2 % CMC‐Na, 0.09 % PEO, 0.20 % PVA, and 99.31 % water (mass concentration). Electrostatic interactions between components enable polymer chains to form multi‐point cross‐linking, improving solution stability and viscosity. Hydrogen bonding between polymers and water enhances water retention and promotes uniform water loss, forming a thicker and stronger solidified layer on coal. The results show that the viscosity is 139 mPa·s at 25 °C; the hardness of the solidified layer exceeds 35 HD at 40–60 °C; and the wind erosion rate is only 0.3 % under 12 m·s −1 . Moreover, the HTRDS also has an approximately 3.7 % higher environmental degradation rate than the commercial product.