Flame propagation behaviours and explosion characteristics of Al[sbnd]Mg alloy dust based on thermodynamic analysis.

The ignition sensitivity and explosion hazard of Al Mg alloy dust were systematically studied in this paper. The flame propagation and explosion characteristics of Al Mg alloy were studied experimentally. Then the activation energy of the reaction was studied and the explosive products were analysed. The experimental results show that. Smaller particle sizes of Al Mg alloy dusts are more sensitive to ignition and are more likely to explosion. The explosion flame propagation velocity gradually decreases with increasing particle size, and the flame propagation acceleration of small particle size of Al Mg alloy dust gradually increases. Smaller particle size Al Mg alloy dusts have higher explosion pressure and higher explosion risk. Due to the smaller particle size the activation energy of the Al Mg alloy dust is smaller. Therefore, Al Mg alloy dust with small particle size has a faster chemical reaction rate, is more prone to explosive reactions and is more dangerous. [Display omitted] • The MIE increases and then decreases with increasing dust cloud concentration. • P ex and (dP/dt) ex reach a maximum at a dust concentration of 750 g/m3. • The activation energy decreases with decreasing particle size. • The smaller the particle size the greater the ignition sensitivity and the higher the risk. • Three things can happen when Al Mg alloy particles enter a high temperature gas environment. [ABSTRACT FROM AUTHOR]