Where is iron ore made from iron?
Iron ore mainly magnetite (theoretical iron 72.4%), hematite (theoretical iron 70%), limonite (theoretical iron 53~56%), siderite (theoretical iron content of about 48%) and so on.
Iron ore used in iron smelting is the main component of iron, when it contains a certain amount of impurities, such as SiO2, Al2O3, CaO, MgO and so on. Domestic iron ore, in general, SiO2 is the main impurity elements.
The iron concentrate used in iron smelting is lower than the theoretical iron content, so there are some impurity elements in it.
