![]() Most new steel contains recycled steel.Ĭheck out our publication World Steel in Figures for more information. Demand is met through the combined use of the BF-BOF and EAF production methods.Īll of these production methods can use recycled steel scrap as an input. Therefore, there is not enough recycled steel to meet growing demand using the EAF steelmaking method alone. Most steel products remain in use for decades before they can be recycled. More details relating to the data above is available from our Steel Statistical Yearbook. The OHF process is very energy-intensive and is in decline owing to its environmental and economic disadvantages. About 30% of steel is produced via the EAF route.Īnother steelmaking technology, the open hearth furnace (OHF), makes up about 0.4% of global steel production. ![]() Downstream process stages, such as casting, reheating and rolling, are similar to those found in the BF-BOF route. Electrical energy can be supplemented with oxygen injected into the EAF. Additives, such as alloys, are used to adjust to the desired chemical composition. Steel’s support of global construction helps fuel a market valued at around 11 trillion and is expected to grow to 14 trillion by 2025. Steel made in an EAF uses electricity to melt recycled steel. After casting and rolling, the steel is delivered as coil, plate, sections or bars. Then the iron is converted to steel in the BOF. First, iron ores are reduced to iron, also called hot metal or pig iron. Depending on the plant configuration and availability of recycled steel, other sources of metallic iron such as direct-reduced iron (DRI) or hot metal can also be used in the EAF route.Ī total of around 70% of steel is produced using the BF-BOF route. For the BF-BOF route these are predominantly iron ore, coal, and recycled steel, while the EAF route produces steel using mainly recycled steel and electricity. The key difference between the routes is the type of raw materials they consume. ![]() Variations and combinations of production routes also exist. Steel is produced via two main routes: the blast furnace-basic oxygen furnace (BF-BOF) route and electric arc furnace (EAF) route. ![]()
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