What is Iron Ore ?
Iron ores are rocks and minerals from which metallic
iron can be economically extracted.
The ores are usually rich in iron oxides and vary in
colour from dark grey, bright yellow, or deep purple to rusty red.
The iron is usually found in the form of
magnetite (Fe3O4, 72.4% Fe), hematite (Fe2O3, 69.9% Fe), goethite (FeO(OH), 62.9% Fe),
limonite (FeO(OH)·n(H2O), 55% Fe)
or siderite (FeCO3, 48.2% Fe).
Ores containing very high quantities of hematite or
magnetite (greater than about 60% iron) are known as "natural ore"
or "direct shipping ore", meaning they can be fed
directly into iron-making blast furnaces.
Iron ore is the raw material used to make pig iron,
which is one of the main raw materials to make steel—98% of
the mined iron ore is used to make steel.[2] Indeed, it has been argued
that iron ore is "more integral to the global economy than any other commodity, except perhaps oil.
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