Alongside the extensive use of magnesium, dust explosion accidents have become increasingly frequent. Conducting research on suppressing magnesium dust explosions is of great significance for the healthy development of the magnesium industry. In this paper, the effects of four inert gases (CO₂, N₂, Ar, and He) on the explosion characteristics parameters of magnesium dust clouds with different concentrations were investigated using a closed explosion device. It was observed that at low volume fractions of inert gases in the explosion system, there were no significant differences in their effects on the explosion characteristics parameters and the combustion time of magnesium particles. In situations where there was a high level of oxygen, N₂ was more effective than Ar in suppressing explosions. However, when the concentration of magnesium dust cloud was higher and the oxygen content was lower within the hybrids, N₂ reacted with magnesium dust that was unable to react with oxygen. As a result, the explosion suppression effect gradually shifted from N2 being better than Ar to Ar being better than N₂. Moreover, the differences in the effects of four inert gases on particle combustion time became increasingly prominent. However, in all operating conditions, CO₂ demonstrated the most effective suppression of magnesium dust explosions, while He exhibited the least effective suppression effect. Furthermore, by employing a chemical reaction kinetics calculation model, it has been discovered that the content of inert gases significantly affected the combustion time and reaction mode of particle combustion, thereby causing variations in the propagation behavior of magnesium dust cloud flames.

随着镁的广泛使用，粉尘爆炸事故也日益频繁。开展抑制镁粉尘爆炸的研究对于镁工业的健康发展具有重要意义。本文利用封闭爆炸装置研究了四种惰性气体(CO ₂、N ₂、Ar和He)对不同浓度镁尘云爆炸特性参数的影响。结果表明，爆炸体系中惰性气体体积分数较低时，它们对爆炸特性参数和镁颗粒燃烧时间的影响没有显着差异。在氧气含量较高的情况下，N ₂比 Ar 更能有效抑制爆炸。然而，当混合体中镁尘云浓度较高且氧含量较低时，N ₂与不能与氧反应的镁尘发生反应。结果，抑爆效果逐渐从N 2 优于Ar 转变为Ar 优于N ₂。而且，四种惰性气体对颗粒燃烧时间影响的差异日益凸显。然而，在所有操作条件下，CO ₂对镁粉尘爆炸的抑制效果最有效，而He 的抑制效果最差。此外，通过化学反应动力学计算模型发现，惰性气体的含量显着影响颗粒燃烧的燃烧时间和反应模式，从而导致镁尘云火焰的传播行为发生变化。