铝粉的爆炸特性研究  

Study of Aluminum powder explosion characteristics

作　　者：陈成[1] 胡双启[1] 范裕如[1] 陈国防[2] 冯永安[1] 

机构地区：[1]中北大学化工与环境学院,太原03005 [2]山西兰花集团北岩煤矿有限公司,晋城048000

出　　处：《化工中间体》2013年第1期36-38,共3页

摘　　要：本研究的目的是在哈特曼管中确定纳米铝粉的粒径与其最大爆炸压力,最大上升速率,最小爆炸浓度和最小点火能量的关系。结果表明:35纳米铝粉最大爆炸压力为0.73MPa,粉尘爆炸强度为34.9MPa·m/s;100纳米铝粉最大爆炸压力为1.25MPa,粉尘爆炸强度为29.6MPa·m/s;40微米铝粉最大爆炸压力为0.59MPa,粉尘爆炸强度为7.7MPa·m/s.35纳米的粉尘爆炸强度是40微米的4.5倍。35纳米、100纳米、40微米铝粉的爆炸下限分别为40g/m3,50g/m3,65g/m3.35纳米铝粉,100纳米铝粉的最小点火能都小于1mJ。然而,40微米铝粉的最小点火能为59.7mJ。This research was aimed at determining the relationships between the particle diameter of an aluminum nanopower and its maximum explosion pressure (Pmax), maximum rate of pressure rise ((dP/dt)max), minimum explosion concentration (MEC), and minimum ignition energy (MIE) by 1.2L Hartmann apparatus. The results revealed that 35-nm aluminum powder has a Pmax of 0.73MPa and deflagaration index (KSt) of 34.9M Pa m/s, in 100-nm aluminum powder, Pmax of 1.25MPa and KSt of 29.6 MPa m/s and 40-μm aluminum powder, Pmax of 0.59MPa and KSt of 7.7M Pa m/s. The value of (dP/dt)max for the 35-nm aluminum powder is 4.5 times that for the 40-μm aluminum powder. The 35-nm, 100-nm, and 40-μm powders have MEC values of 40, 50, and 65 g/m3, respectively. The 35-nm and 100-nm powders both have MIEs less than 1mJ. while the 40-μm powder has an MIE of 59.7mJ.

关 键 词：纳米粉尘 最大爆炸压力 最大压力上升速率 爆炸下限 最小点火能 

分 类 号：TB383.3[一般工业技术—材料科学与工程]