How many operations are required from iron ore to steel?
The main products are pig iron, the by-products are slag and furnace gas (see the process and principle of smelting)pig ironSteel pig iron: the mass fraction of silicon is low (wSi<1.25%), the fracture is silvery white, mainly used in steel makingCast iron: high mass fraction of silicon (wSi>1.25%~3.2%), the fracture was black, used in cast materials
Iron ore: the main raw material for iron smelting, magnetite, Fe3O4, hematite, Fe2O3, limonite, 2Fe2O3.3H2O, siderite, FeCO3". Iron ore in addition to iron compounds, but also contains silicon, manganese, phosphorus, sulfur and other compounds, collectively referred to as gangueCoke: the heat of combustion provides a heat source for iron smelting; the CO gas produced by incomplete combustion serves as a reducing agent to reduce iron from the oreFlux: Limestone (CaCO3) and fluorite (CaF2). Its function is to combine with the gangue in the iron ore to form molten slag with low melting point, small density and good fluidity, so that it can be separated from the molten iron so as to obtain more pure pig iron liquid
To smelt ironIronmaking is the process of reducing iron from oreIronmaking method: blast furnace ironmakingIron smelting raw materials: iron ore, coke, solvents, etc.
