Ilmenite heating industrial furnace at ilmenite ore factory. Mining, metallurgical plant, quarry. A furnace is an industrial furnace used for many things, such as the extraction of metal from ore (smelting) or in oil refineries and other chemical plants, for example as the heat source for fractional distillation columns.
The term furnace can also refer to a direct fired heater, used in boiler applications in chemical industries or for providing heat to chemical reactions for processes like cracking, and is part of the standard English names for many metallurgical furnaces worldwide.
The heat energy to fuel a furnace may be supplied directly by fuel combustion, by electricity such as the electric arc furnace, or through induction heating in induction furnaces. Ilmenite smelting is conducted in both AC and DC electric furnaces. ... while the pig iron is used mainly as feedstock in the foundry industry.