Study on Synergistic Moistening Effect of Colloidal Dust Inhibitor on Coal
In order to control the generation of the dust in coal mining operations,the literature analysis and experimental tes-ting were used to screen the single component dust inhibitor with a better performance in moistening and water retention.Af-ter that,a coalbed gelation and moistening-type dust inhibitor with sodium alginate as the main component was developed,which consists of 0.25 wt％sodium alginate,0.15 wt％gluconolactone,0.15 wt％calcium disodium ethylenediamine tetraac-etate,and 0.1 wt％sodium dodecyl sulfate.The water content,water retention,SEM,specific surface area and aperture were measured.The results show that the dust inhibitor can significantly enhance the water content and water retention rate of the coal seams,in which the water content is nearly 4 times and the water retention time is twice more than that of water trea-ted coal;and that the scanning electron microscopy,specific surface area and aperture tests demonstrate that the colloidal dust inhibitor can enhance the adhesive properties of the material on the coal,and can enter the internal pores of the coal to form the glue on the inner and outer surfaces of the coal,effectively improving the moisturizing effect and realizing the fun-damental control of the coal dust generation.
colloidal dust inhibitorcoal seam water injectionsynergistic moisteningwater retention performance
NETL
NSTL
万方数据
维普
