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<p>To overcome the limitations of conventional water-based dust suppression in arid, high-temperature open-pit coal mine haul roads, this study developed an innovative molasses-based dust suppressant with enhanced water retention and consolidation capabilities. The formulation leverages molasses-a sugar industry byproduct with inherent anti-evaporation properties-as its core component, supplemented with surfactant (sodium dodecyl benzene sulfonate, SDBS), humectant (glycerol), and hygroscopic (calcium chloride, CaCl₂) additives. Employing response surface methodology (RSM), the optimal composition was determined to be: 31.06% molasses, 0.73&#xa0;g/L SDBS, 1.68% glycerol, and 1.50% CaCl<sub>2</sub>. Experimental validation confirmed the model’s reliability, showing &lt; 3% deviation between predicted and actual performance metrics. Field evaluation produced significant results: small-scale testing with 2.5-ton and 4.4-ton mine vehicles maintained dust-free conditions for three consecutive days, while medium-scale trials with loaded (550-ton) and unloaded (225-ton) haul trucks achieved effective dust control for over 6&#xa0;h. The suppressant creates a durable, homogeneous consolidation layer with substantial mechanical strength when applied. The suppression mechanism combines immediate dust wetting with prolonged suppression via dust particle solidification post water evaporates.</p>

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Optimization and field application of an eco-friendly molasses-based dust suppressant for open-pit coal mine haul roads

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月18日

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  • Yu Zhang,
  • Junlong Yan,
  • Wei Zhou,
  • Weiqing Zhang,
  • Xiang Lu,
  • Peiyuan Li,
  • Fanghui Yang,
  • Zhifan Wang

摘要

To overcome the limitations of conventional water-based dust suppression in arid, high-temperature open-pit coal mine haul roads, this study developed an innovative molasses-based dust suppressant with enhanced water retention and consolidation capabilities. The formulation leverages molasses-a sugar industry byproduct with inherent anti-evaporation properties-as its core component, supplemented with surfactant (sodium dodecyl benzene sulfonate, SDBS), humectant (glycerol), and hygroscopic (calcium chloride, CaCl₂) additives. Employing response surface methodology (RSM), the optimal composition was determined to be: 31.06% molasses, 0.73 g/L SDBS, 1.68% glycerol, and 1.50% CaCl2. Experimental validation confirmed the model’s reliability, showing < 3% deviation between predicted and actual performance metrics. Field evaluation produced significant results: small-scale testing with 2.5-ton and 4.4-ton mine vehicles maintained dust-free conditions for three consecutive days, while medium-scale trials with loaded (550-ton) and unloaded (225-ton) haul trucks achieved effective dust control for over 6 h. The suppressant creates a durable, homogeneous consolidation layer with substantial mechanical strength when applied. The suppression mechanism combines immediate dust wetting with prolonged suppression via dust particle solidification post water evaporates.