Guo You-wei ( 1.Yunnan Sipaier Mining CO.,Ltd, Yunnan Qujing 655500; 2.Shandong Energy Zaozhuang Mining Group CO.,Ltd, Shandong Zaozhuang 277000 )
Coal-dust wettability is one important physicochemical properties, which is the"solid-gas"interface formed by the air outside and the solid particle could be replaced by a new"solid-liquid"interface.What are to affect the characteristic include the chemical composition, particle size, surface shape, surface roughness, other their own conditions and other external environmental factors. The wettability is one of the basis for choosing suitable dedusting way in coalmine. Based on GB/T 16913. 8-1997, 4 different coalmines were chosen for coal-dust wettability test. The experiments include immersion speed test for different particle sized coal-dust;immersion degree of coal-dust affected by water and wetting agent was compared. The normal law of coal-dust immersion was analyzed by the test.