Solid · Smelter input
Copper arrives as a solid extracted from Copper Ore. It often shares a logistics route with Sand, but the official Wiki is explicit: process it in a Smelter, not with open flames.
Working route
Copper is extracted from Copper Ore and can share an incoming route with Sand.
Use a Filter to divide Copper from Sand before either material reaches its own processor.
The official Copper entry names the Smelter as the route to Liquid Copper.
Copper cannot be melted with flames; keep the thermal work around the Smelter rather than treating it as direct ignition.
Questions answered
Use a Smelter to make Liquid Copper. The official Wiki says Copper cannot be melted with flames.
Yes. The official Copper page notes they are often found together and can share logistics before a Filter separates them.
Evidence notes
