A furnace doesn't just output cold usable results. You need to wait for them to cool down.
Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
I am using mod Muluna, Moon of Nauvis. There is an aluminum plate, made from local alumina resource. Hot metals somehow change it's icon so it looks like iron plate. https://ibb.co/fGCwMmNk
