76··高硅铝合金粉尘云燃爆特性研究*马万太1蒋云泽2史志翔1冷晟1（1.南京航空航天大学，江苏南京210016；2.江苏豪然喷射成形合金有限公司，江苏镇江212200）摘要通过开展硅质量分数25%高硅铝合金粉尘燃爆特性研究，揭示了硅质量分数25%高硅铝合金粉尘的最小点火能、最低着火温度、爆炸下限和最大爆炸压力。研究结果表明，在实际生产中要防止高硅铝合金粉尘云与雷电、静电、生产中摩擦或碰撞所产生的火花等能量源接触，避免达到高硅铝合金粉尘云的最小点火能0.1～0.2mJ而引发爆炸事故；要防止出现明火与发热设备热表面温度达到高硅铝合金粉尘云最低着火温度960℃；对高硅铝合金生产场所、工艺设备等进行抗爆设计时，约束爆炸压力措施承受最大爆炸压力的冲击至少要在0.525MPa或以上。关键词金属粉尘粉尘爆炸最小点火能（MIE）最低着火温度（MIT）爆炸压力StudyonthedustcloudsignitionandexplosioncharacteristicsofaluminumalloywithhighersiliconcontentsMAWantai1JIANGYunze2SHIZhixiang1LENGSheng1（1.NanjingUniversityofAeronauticsandAstronautics，NanjingJiangsu210016，China）AbstractBytheresearchontheignitionandexplosioncharacteristicsofaluminumalloydustwith25%siliconcon-tentwascarriedout.Theminimumignitionenergy，minimumignitiontemperature，lowerexplosionlimit，andmaxi-mumexplosionpressureofaluminumalloydustwith25%siliconcontentwererevealed.Thefollowingresultswereachieved：inactualproduction，itisnecessarytopreventthealuminumalloydustwithhighersiliconcontentsfromcontactingwithenergysourcessuchaslightning，staticelectricity，sparksgeneratedbyfrictionorcollisioninproduc-tionandavoidreachingtheminimumignitionenergyof0.1-0.2mJofaluminumalloydustwithhighersiliconcontentsandcausingexplosionaccidents.Topreventtheoccurrenceofopenflameandthehotsurfacetemperatureofheatingequipmentreachestheminimumignitiontemperatureof960℃ofaluminumalloydustwithhighersiliconcontents.Whencarryingoutananti-explosiondesignforproductionsitesandprocessequipmentofaluminumalloydustwithhighersiliconcontents，therestraintexplosionpressuremeasuresmustwithstandtheimpactofthemaximumexplosionpressureatleast0.525MPaormore.Keywordsmetaldustdustexplosionminimumignitionenergym...
