Steel is manufactured by the chemical reduction. of iron ore, using an integrated steel manufac. turing process or a direct reduction process. In. the conventional integrated steel manufacturing. process, the iron from the blast furnace is con. verted to steel in a basic oxygen furnace BOF.
The H246;gan228;s process is a direct reduction method for production of sponge. iron powder using magnetite ore Fe3O4 and carbon as raw materials. The. reduction process takes place in a gas fired tunnel kiln at around 1200176;C for. 60 hours producing a sponge iron cake that is crushed, milled and.