Research Of The Coal=dust Suppressants

The research focuses on the coal encountered in the process of environmental pollution and transportation problems of coal losses,which existent in the coal industry. Researching prepared a chemical dust suppressants, to solve environmental pollution problems and the loss of coal issues.In the process of the experiment, I chose to starch, sodium silicate, with glycerol as the main raw materials. Through orthogonal test find the better formula and the preparation conditions: the quantity of starch formulation is 5g/100mlH₂O; adding sodium volume 9g/100mlH₂O; glycerol addition is 1.5g/100mlH2O. Preparation conditions are: the speed at 3000r/min, the constant stirring 30-40 minutes.Based on the best formula of dust suppressants, I had measured the function of the dust suppressants which mainly including viscosity, surface tension, anti-evaporation rate, absorption rate, water retention, anti-rain performance, wind resistance and strength.The results of measurement show that the viscosity of the dust suppressants is 0.007Pa ? s; surface tension is 47.3mN / m; in the high temperature of 40℃still had good resistance to evaporation; dust suppressants natural curing, the moisture absorption rate to 7.83% and moisture content was 21.5%, indicating that the process of using dust suppressants has good moisture absorption and water retention, which can achieve better dust effects; the dust suppressants intensity can reach 5.46MPa with high compression performance, can satisfy the basic requirements of the process of compression; the dust suppressants in the cold and hot climatic conditions still showed a better performance, and It can resist the erosion of five wind forces.In addition, this study also conducted a field experiment of coal field, the results show that the dust suppressants dust suppressants had a good result with practical usability. Also carried out on the sand and dust test, The results show that the dust suppressants on the sand and dust also had a good effect.