Briefly explain the process of iron & steel
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Answer:
Explanation:In the primary steelmaking step, liquid iron is converted into steel by the basic oxygen furnace (BOF) process, or by melting scrap steel or direct reduced iron (DRI) in an electric arc furnace. Secondary steelmaking is a refining process in which alloying metals are added and impurities are removed.
Iron making is Reduction process that is generally done in Blast furnace(BF) . It is one of major part of steel making that takes place before steel making in Basic oxygen furnace (LD converter). Raw material used in BF is iron ore agglomerate, coke and limestone as flux . IN Combined form it is called burden. Beside this air is also injected in BF through tuyeers level. When Burden is charged in BF coke in burden react with oxygen in Air and forms the Co and Co2 and N2 gas. Mainly Co that act as reducing agent in BF. These hot gases is rising upward in BF and series of reactions between Co gas and iron ore agglomerate takes place in different section of BF. And iron ore reduced into Hot metal. Hot metal is impure molten iron that contain carbon, silicon, magnese, sulphur, phasphorus etc.
Steel is made from mostly iron with other things added to change it’s properties. The carbon content ranging from 0.1% to around 2%, determines how hard the steel in and it its strength to a point. Other things such as nickel, manganese, vanadium, cobalt as well as others. There are many, many different types of steel
