镁粉爆炸特性的实验研究

Experimental Investigation on Explosive Characteristics

镁粉具有爆炸的危险性。采用20L球形爆炸实验装置,研究了镁粉爆炸过程中镁粉的浓度、镁粉粒径对最大爆炸压力、最大压力上升速率的影响;提出了预防镁粉爆炸、降低爆炸的安全措施。实验结果表明,随着镁粉浓度的增加,爆炸的危害性越大,当浓度增加到一定程度时,爆炸压力和压力上升速率达到最大值,此时浓度再增加,爆炸压力和压力上升速率将逐渐减小,爆炸的危害性减小;此外镁粉粒径越小,爆炸危害性越大。

Magnesium powder has danger of explosion. 20L spherical explosion experimental device was used to study on concentration of magnesium powder, magnesium powder particle size effects on maximum explosion pressure and the maximum rate of pressure rise in the process of magnesium powder explosion; some measures were produced to prevent magnesium powder explosion and reduce the security of the explosion. The experiment results show that, with the increase of concentration of magnesium powder, the greater the danger of explosion, as the concentration increases to a certain extent, explosion pressure and rate of pressure rise reach maximum, and then the concentration and increase explosion pressure and rate of pressure rise will gradually decrease, reduce the danger of explosion ; In addition magnesium powder particle size smaller, larger explosion hazard.