Study on preparation and properties of a new adhesive dust suppressant
In order to solve the harm of coal dust pollution to the environment and workers,a new environmentally friendly hydrogel dust suppressant GG-PVA-AA(guar gum-polyvinyl alcohol-acrylic acid)was prepared by using the hydrogen bond interaction between GG(guar gum),PVA(polyvinyl alcohol)and AA(acrylic acid),aiming at improving the poor mechanical properties and adhesive properties of the current hydrogel dust suppressant.Scanning electron microscope shows that GG-PVA-AA can form a dense solidified film between coal dust particles after spraying the dust suppressant,and bind the coal dust particles together.The dense protective structure can effectively inhibit the generation and diffusion of coal dust and achieve ideal dust suppression effect.The experimental results of the wind erosion resistance show that the mass loss of pulverized coal treated with GG-PVA-AA dust inhibitor is 15.9％under the condition of strong wind erosion of 9 m/s,which shows that GG-PVA-AA dust inhibitor has good wind erosion resistance.Moreover,the mutual adsorption process of the dust suppressant/coal system and the water/coal system were analyzed,revealing that the adsorption of dust suppressant molecules is larger than that of water molecules,thus uncorering the dust suppressant mechanism from a micrscopic perspective.
NETL
NSTL
万方数据
