抛光铝合金粉尘爆炸参数及防爆研究

摘要

以汽车车身打磨抛光车间内的铝合金粉尘为研究对象，由20 L球测得爆炸下限为190～200 g／m3，其粉尘层最低着火温度为250℃，粉尘云最低着火温度为290℃，粉尘云最低着火能大于1 J。由于抛光液和空气氧化的作用，试验所研究铝合金粉尘比一般的铝混合粉尘爆炸下限和最小点火能都大为提高。%Based on the grinding and polishing of automobile body in the workshop for the study of aluminum alloy dusts , the lower explosion limit is obtained to 190-200 g/m3 by twenty liter explosion chamber ,the minimum ignition temperature of dust layer is 250 ℃ ,the minimum ignition temperature of dust cloud is 290 ℃ and the minimum ignition energy of dust cloud is over 1 J .Because of the polishing liquid and air oxidation ,its lower explosion limit and minimum ignition energy has greatly been improved comparing the experimental aluminum alloy dust with the conventional aluminum hybrid dust .