Research On Compand Foam Dustfall Agent

The coal dust can not only severely damage workers ' healthy, but also seriously threaten safety production of coal mine. But the traditional dust falling method, which depending on water, has bad effect, especially for breathing dust. Moreover, it is easy to deteriorate working environment. Advantage and disadvantage of dust suppression method on water have been analyzed in this paper, it is concluded that foam falling dust can reduce water consumption and increase efficiency of reducing dust.Characteristics of coal dust have been comprehensive studied in the paper. For example, particle size of coal dust has been researched by Winner3001 Laser Grain Size Analyzer, and in consequence, the particle size distribution of three experimental coal dust samples have been obtained. Shape and structure of coal dust have been analyzed by scanning electron microscope, it is shown that the size of particles is uneven and the shape of particles is irregular. Wettability of coal dust has been studied by DSA100 dynamic contact angle measuring instrument, it is proved that wetting effect of mine water and distilled water is not very ideal.It is determined three foaming agents, four stabilizing agents, two wetting agents through original selection on foaming agent, stabilizing agents and wetting agent, which constituting foam dustfall agent. According to national standard GB/T7462-94 "Foaming ability measurement of surfactant—improved Ross-Miles method", it had experimental studied on foam performance of foam dustfall agent which had different proportion by single factor experiment, and optimal analyzed experiment data through Origin data analysis software. Finally, eight foam dustfall agent formulas had been primary determined. And the wettability between eight foam dustfall agent and coal dust had also been researched. As a result, the wetting effect of foam dustfall agent is far better than mine water and distilled water. Finally, two foam dustfall agent have been settled.