Electric heater heats up the crucible to the 2100 K and keep it at that level.
Mold (with using monkey wrench to Auto-input ON mode) and hopper below.I disable the hopper below the mold.
Iron melts in crucible and on 1811K pulls out in the mold.
How disable auto-input to mold?
use the monkey wrench on the mold again to turn auto input off, not disabling the hopper. Turn auto input back on the mold after your iron turns to wrought iron.