Iron ore | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Iron_ore


00:01:17 1 Sources
00:03:30 1.1 Banded iron formations
00:04:51 1.2 Magnetite ores
00:06:19 1.3 Direct-shipping (hematite) ores
00:07:26 1.4 Magmatic magnetite ore deposits
00:09:08 2 Mine tailings
00:11:09 3 Extraction
00:11:39 3.1 Magnetite
00:12:58 3.2 Hematite
00:13:36 4 Production and consumption
00:17:26 4.1 Iron ore market
00:20:17 5 Available iron ore resources
00:20:27 5.1 Available world iron ore resources
00:20:59 5.2 Australia
00:21:50 5.2.1 Pilbara deposit
00:26:36 5.3 United States
00:28:09 5.4 Canada
00:29:02 5.5 Brazil
00:29:42 6 Smelting
00:31:23 6.1 Trace elements
00:32:18 6.1.1 Silicon
00:33:24 6.1.2 Phosphorus
00:37:48 6.1.3 Aluminium
00:39:19 6.1.4 Sulfur
00:44:56 7 See also



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SUMMARY
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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. Indeed, it has been argued that iron ore is "more integral to the global economy than any other commodity, except perhaps oil".