摘要：采用20L球爆炸测试装置、哈特曼管式爆炸测试装置和Godbert-Greenwald炉等研究不同粒径环氧粉末涂料在不同质量浓度和喷粉压力下的爆炸敏感度和强度参数的变化规律。结果表明：粉尘云最小爆炸质量浓度为30～40 g/m3，且随粒径增加呈现非单调变化；爆炸压力随质量浓度增大呈现先增大后减小的趋势，存在最佳爆炸浓度；粉末粒径对最大爆炸压力无显著影响，最大压力上升速率随粒径增大而明显减小；最小点火能、粉尘云最低着火温度随粒径增加而单调递增，粉尘云最低着火温度随喷粉压力增加而逐渐降低。
关键词：环氧粉末涂料；爆炸猛烈度；爆炸敏感度；危险性评估；半定量
Abstract: The explosion sensitivity and severity parameters of epoxy powder coatings with different particle sizes under different mass concentration and spray pressure were studied using 20 L sphere，Hartmann tube and Godbert－Greenwald ( G－G) furnace．The results show that the lower explosion limit ( LEL) is nonmonotone with the increasing of particle size，and LEL is 30～40 g /m3．The explosion pressure increases first and then decreases with the increase of concentration． The particle size has no significant effect on the maximum explosion pressure，but the maximum pressure rise rate decreases with the increasing of the particle size．The minimum ignition temperature ( MIT) of dust cloud and minimum ignition energy ( MIE) of dust cloud increase monotonously with the increasing of particle size，while the MIT decreases with the increasing of powder injection pressure．
Keywords: epoxide powder coating; explosion severity; explosion sensitivity; hazard assessment; semi－quantitative
