Experiment Study on Influence of Size Distribution and Concentration on Magnesium Powders Explosion

摘要：

In order to prevent and mitigate magnesium dust explosions, the explosion ability of four types of magnesium powders was characterized experimentally in 20L sphere. Excepting type I, the maximum overpressure (pmax ) and maximum rate of pressure rise ((dp /dt)max) almost appear at a dust concentration of 1500g/m3 in the 20L sphere apparatus. The two parameters increase rapidly with an increase in dust concentration in the lower ranges, and then decrease gradually in the higher ranges. It was also found that a smaller particle size led to a higher maximum pressure and rate of pressure rise. The results of X-ray analysis were shown that the nitrification between nitrogen and magnesium powder occurred synchronously with its oxidation during the explosion.

关键词： explosion magnesium powders maximum explosion pressure 20L sphere

作者: YUAN Chunmiao LI Chang LI Gang ZHANG Peihong

作者单位: Fire & Explosion Protection Laboratory, Northeastern University, Shenyang 110004, Liaoning, China Institute of Safety Engineering, Department of Civil Engineering, Shenyang Jianzhu University, Sheny

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 1035-1039

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）