From Captain of Industry Wiki
|Transported by||Molten Channel|
Molten Copper is an intermediate molten product with the sole purpose of being cast into Impure Copper in a Metal Caster or, later, in a Metal Caster II at greater speed.
In the early game, Molten Copper is produced by smelting Copper Ore directly with Coal in a Blast Furnace. Upon unlocking the Blast Furnace II, Molten Copper can be made from Copper Ore Crushed at a higher efficiency with the added requirement of Sand. At endgame, Molten Copper is generally produced using using Graphite in place of Coal and with the addition of Water to reduce the amount of Slag and Exhaust byproducts produced.