中文摘要：

为了评估环氧丙烷蒸气-铝粉-空气杂混合物的爆炸危险性，在5L圆柱形爆炸装置中分别对铝粉、环氧丙烷蒸气及铝粉与环氧丙烷蒸气共存条件下的杂混合物进行了爆炸浓度下限的实验研究。结果表明：环氧丙烷蒸气可使杂混合物的爆炸下限浓度降低；杂混合物的最大爆炸压力上升速率由于环氧丙烷蒸气的存在而增强；当铝粉浓度较低时，环氧丙烷蒸气的加入使最大爆炸压力明显增加，之后随着铝粉浓度的增加，最大爆炸压力反而减小。

英文摘要：

To evaluate the hazard of combined gaseous epoxypropane-aluminum dust explosions, a 5 L spherical exploding device was used to measure the lower limit of explosion densities of aluminum dust in aluminum dust-air mixtures and gaseous epoxypropane-aluminum dust-air hybrid mixtures,and gas-eous epoxypropane in gaseous epoxypropane-air mixtures. The results show that the existence of gas epoxypropane can reduce the lower limit of explosion density of the hybrid mixtures, and enlarge the rate of pressure rise of the hybrid mixtures;at low aluminum dust concentration, the maximum over-pressures rise due to the existence of gaseous epoxypropane,and then fall with increasing aluminum dust concentration.