Iron ores are rocks and minerals from which metallic iron can be economically extracted. . Ores containing very high quantities of hematite or magnetite (greater than about 60% iron) are known as "natural ore" or . The thermodynamic barriers to separating pure iron from these minerals are formidable and energy intensive,.
Iron ores are rocks and minerals from which metallic iron can be . The iron itself is usually found in the form of magnetite (Fe3O4), hematite (Fe2O3), goethite, . is left behind when the resultant powder is passed under a magnetic separator.
Hematite: A primary ore of iron and a pigment mineral Geology
Hematite is the most important ore of iron and it has been used by people as a . preparations for heavy media separation, radiation shielding, ballast, and many other . Hematite is not magnetic and should not respond to a common magnet.