This study is aimed at investigating the influence of wetting agent addition on the water adsorption capacity, dust generation capacity and dust particle size distribution of coal. To achieve this aim, nonylphenol ethoxylate 10 wetting agent was used as an additive to prepare a 0.1% concentration solution, and a comparative test was conducted on different coal types from three coal mines in different provinces. The test results suggest that the natural saturated water adsorption time of coal was shortened by 33%–67% through wetting agent addition. Therefore, wetting agents are effective for enhancing water injection operations that require a limited construction period. The influence of wetting agent addition on the saturated water adsorption amount differed significantly for different coal types, and the wetting agent did not generally improve the saturated water adsorption rate. However, wetting agent addition alone did not lower the dust generation rate from coal. For a given moisture content, the wetting agent influenced the particle size distribution of dust generated during impact crushing differently between types of coal. For the three coal types investigated, wetting agent addition reduced the concentration of airborne by up to 8%.

中文翻译：

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润湿剂添加对煤的吸水性和冲击破碎产尘影响的实验研究

本研究旨在研究添加润湿剂对煤的吸水能力、产尘能力和粉尘粒度分布的影响。为此，以壬基酚聚氧乙烯醚10润湿剂为添加剂，配制0.1%浓度溶液，对不同省份三个煤矿的不同煤种进行对比试验。试验结果表明，通过添加润湿剂，煤的自然饱和水吸附时间缩短了33%~67%。因此，润湿剂对于加强需要有限施工期的注水作业是有效的。不同煤种，润湿剂添加量对饱和水吸附量的影响存在显着差异，润湿剂一般不会提高饱和水的吸附率。然而，单独添加润湿剂并不能降低煤的粉尘产生率。对于给定的水分含量，润湿剂对冲击破碎过程中产生的粉尘粒度分布的影响在不同煤种之间是不同的。对于所研究的三种煤类型，添加润湿剂可将空气中的浓度降低多达 8%。