Forced Induction modules are an upgrade for the Ore Smelter which increases smelting speed at the cost of greatly increased power usage. To use the module place it on top of the Ore Smelter.
T4 Forced Induction Upgrades also double the rate at which ore can be collected from the attached Storage Hopper.
Basic Ore Smelters do not support Forced Induction Upgrades.