You can extract liquid iron and liquid copper. Refrigerate them to make plates.
Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
It would be great to have a config option that controls how much liquid ore is required to make 1 plate, a 1:1 conversion feels too powerful sometimes. I would probably set it to 10 or even 100 liquid ore makes 1 plate personally