Green Steel
Steelmaking is the process of producing steel from iron ore and carbon/or scrap. In steelmaking, Impurity, impurities such as nitrogen, silicon, phosphorus, sulfur and excess carbon (the most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon and vanadium are added to produce different Steel grades, grades of steel. Limiting dissolved gases such as nitrogen and oxygen and entrained impurities (termed "inclusions") in the steel is also important to ensure the quality of the products cast from the liquid steel. Steelmaking has existed for millennia, but it was not commercialization, commercialized on a mass production, massive scale until the mid-19th century. An ancient process of steelmaking was the crucible steel, crucible process. In the 1850s and 1860s, the Bessemer process and the open hearth furnace, Siemens-Martin process turned steelmaking into a heavy industry. Today there are two major commercial proces ...
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