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    Suppression Characteristics and Mechanism of Molasses Solution on Coal Dust: A Low-Cost and Environment-Friendly Suppression Method in Coal Mines

    Year: 2022

    Journal: Int. J. Environ. Res. Public Health, Volume 19, DEC

    Authors: Liu, Jianguo; Wang, Tianyang; Jin, Longzhe; Li, Gang; Wang, Shu; Wei, Yixuan; Ou, Shengnan; Wang, Yapeng; Xu, Jingge; Lin, Minglei; Wang, Jiahui; Liu, Xianfeng

    Organizations: National Key Research and Development Program of China [2022YFC2903901]; National Nature Science Foundation of China [52204198]; State Key Laboratory of Safety and Health for Metal Mines [2022-JSKSSYS-02]; Fundamental Research Funds for the Central Universities [FRF-TP-22-115A1]; China Postdoctoral Science Foundation [2022M710355]; China Scholarship Council [201906460048]

    Keywords: coal dust; dust suppressant; molasses; wind erosion; moisturizing; agglutination; anti-evaporation

    Coal dust pollution poses a serious public health threat. This study aimed to investigate the feasibility of creating a coal dust suppressant using molasses, a byproduct of the sugar industry. We studied the effects of a molasses solution of varying concentrations (i.e., ranging from 0% (pure water) to 40%) on the moisture, bonding, and wind erosion properties of coal dust. Overall, the effectiveness of the molasses increased with their concentration, and it manifested itself in the following way: (1) the molasses improved the anti-evaporation ability of wet coal dust. For example, the evaporation mass of the coal dust wetted using a molasses solution decreased by 82.8%; (2) molasses effectively agglutinated coal dust; (3) molasses can effectively decrease the surface tension and increase the viscosity of the wetting solution. The surface tension of the molasses solution reached 41.37 mN/m and the viscosity increased to 6.79 mPa center dot s; (4) molasses can significantly suppress the wind erosion of deposited coal dust, with its wind erosion mass decreasing 99.1%; finally, (5) the effectiveness of molasses at suppressing coal dust was discussed at a molecular level. This study highlights the feasibility of a low-cost and environment-friendly dust suppressant in coal mines.
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