Synonyms for Smelter:

n.

cooling tower, boatyard, derrick, foundry, cannery, brickworks, gasholder, factory, gasometer. artifact (noun)
smeltery.
furnace (noun)
sun lamp, Bunsen Burner, warmer, radiator, jet, potbellied stove, blast furnace, furnace, heater, fireplace, hearth, solar heater, steam heater, coal stove, kiln, burner, register, induction heater, water heater, Franklin stove, coke oven, infrared lamp, oven, firebox.
smelter (noun)
smeltery.

Other synonyms:

Other relevant words:
factory, smeltery, foundry.