Molten Iron/Copper Foundry with Automatic Junk Stone filter - 1.2k/s

Automatically filters out stone once the BUS hits overflow state to ensure that the molten metals will keep flowing. JUNK belts need to be directed to a lava pool and dumped into lava to ensure constant flow of metals.

Inputs:

Calcite: 5/m

Lava: 2.4k/m