The inhibition mechanism of gas-solid inhibitors on Al dust explosion was investigated experimentally in a closed cuboid chamber. The variation of parameters concerning flame propagation characteristic and explosion severity used to reflect the synergistic inhibition effect of gas-solid inhibitors on Al dust explosion were elucidated. The results showed that flame propagation velocity and explosion overpressure were inhibited with the increase of gas-solid inhibitors. The inhibition curves of gas-solid inhibitors within the experimental range were further obtained. The reason concerning the SEEP phenomenon was revealed through the GC-MS analysis. The combustion of ammonia enhanced the explosion overpressure when solid inhibitors performed at low concentration. The gas-phase product could be regarded as the inert gas as long as enough amount of inhibitors were added. To comprehend the inhibition mechanism of gas-solid inhibitors, X-ray diffraction was applied to figure out the crystal structure of explosion residue. The results indicated that both physical and chemical inhibition effects were imposed on Al dust explosion by gas-solid inhibitors, including endothermic decomposition, dilution of oxidizer, coverage of Al dust, and scavenger of free radicals. The results of this study will provide a scientific basis for the design of inhibition technology for the dust explosion.

在密闭的长方体室内实验研究了气固抑制剂对铝粉尘爆炸的抑制机理。阐明了反映火焰传播特性和爆炸强度的参数变化，以反映气固抑制剂对铝粉尘爆炸的协同抑制作用。结果表明，随着气固抑制剂的增加，火焰的传播速度和爆炸超压受到抑制。进一步获得了气固抑制剂在实验范围内的抑制曲线。通过GC-MS分析揭示了SEEP现象的原因。当固体抑制剂在低浓度下进行时，氨气的燃烧会增强爆炸超压。只要添加足够量的抑制剂，气相产物就可以视为惰性气体。为了理解气固抑制剂的抑制机理，采用X射线衍射法确定了爆炸残留物的晶体结构。结果表明，气固抑制剂对铝尘爆炸具有物理和化学抑制作用，包括吸热分解，氧化剂稀释，铝尘覆盖和清除自由基。研究结果为粉尘爆炸抑制技术的设计提供了科学依据。结果表明，气固抑制剂对铝尘爆炸具有物理和化学抑制作用，包括吸热分解，氧化剂稀释，铝尘覆盖和清除自由基。研究结果为粉尘爆炸抑制技术的设计提供了科学依据。结果表明，气固抑制剂对铝尘爆炸具有物理和化学抑制作用，包括吸热分解，氧化剂稀释，铝尘覆盖和清除自由基。研究结果为粉尘爆炸抑制技术的设计提供了科学依据。