Google "aluminum foundry fire", there is plenty of examples.
It does not burn easily but once aluminum has ignited it can continue to burn under normal atmospheric conditions, especially if it begins to melt and boil.
It does not burn easily but once aluminum has ignited it can continue to burn under normal atmospheric conditions, especially if it begins to melt and boil.
Sparks are hotter than 3073°C, but usually they don't ignite aluminium either--there not being enough aluminium vapour to sustain the reaction.
I've done what you said and googled, but have not found a case that indicates non-dust aluminium was burning.
https://www.readingeagle.com/2022/04/19/reamstown-fire-alumi... : Looks like a dust fire. Easily extinguished. Does not sound like any solid or molten aluminium was burning.
https://dailyvoice.com/pennsylvania/lancaster/news/fire-brea... "The fire is believed to have started in the finishing area, where workers grind the aluminum castings"
https://www.fox43.com/article/news/local/fire-aluminum-found... no details
https://lancasteronline.com/news/local/fire-damages-east-coc... "not sure what caused the fire, which began near – but not in – a dust collection system at the plant."
https://www.abc4.com/news/fire-causes-400k-in-damages-to-ogd... "The fire was contained within an hour after crews arrived. No one was injured. Damages were mainly to the machinery and the foundry metal fabrication plant structure."
https://mix999fm.iheart.com/featured/murphy-sam-jodi/content...
https://news.yahoo.com/fire-boose-aluminum-foundry-lancaster... (Video shows normal flames, not from a metal fire.)