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alun est prise a partir du minerai de bauxite

USGS Minerals Information: Bauxite

Bauxite is a naturally occurring, heterogeneous material composed primarily of one or more aluminum hydroxide minerals, plus various mixtures of silica, iron oxide, titania, aluminosilicate, and other impurities in minor or trace amounts.

Bauxite - Wikipedia, the free encyclopedia

Bauxite, an aluminium ore, is the world"s main source of aluminium. It consists mostly of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH) and diaspore α-AlO(OH), mixed with the two iron oxides goethite and haematite, the clay mineral kaolinite and small amounts of anatase TiO2.

bauxite — Новый большой англо-русский словарь

bauxite — f боксит … Большой итальяно-русский и русско-итальянский словарь.La bauxite, principal minerai d aluminium. * ... … …bauxite — BAUXITE n. f., d abord beauxite (1837) puis, correctement, bauxite (1928), est dérivé du nom des Baux de Provence, près d Arles (Bouches du Rhône), où cette...

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À partir du règne de Louis le Gros, les communes ont commencé à être affranchies de la féodalité. Starting with the reign of Louis the Fat, communes began to be incorporated into the feudal system. À partir d’aujourd’hui, soyez plus exact.


Bauxite: The aluminum mineral bauxite information and pictures

About Minerals. Advertise. Facebook. Twitter. Contact Us.Bauxite does not make aesthetic or interesting specimens as far as collectors are concerned, but it holds importance as being the primary ore of the metal aluminum.

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bauxite processus d'aluminium | Forum

Concasseur de minerai de bauxite est un grand équipement de broyage dans une usine d’enrichissement du minerai de bauxite .The ore most commonly used for the extraction process is bauxite 1989 Histoire Technique de la Production d’Aluminium.

Aluminum Extraction From Clays - Open Source Ecology

Clays are posible start material or feldspar mineral (weather to clay). Bauxite are rare.Bauxite are rare minera, clay are common so chemical process based on clay- not bauxite.


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GDA Home - Alu Encyclopaedia | Bauxite / bauxite mining

GDA Home > GDA Services > Alu Encyclopaedia. Bauxite / bauxite mining. Deposits. In 1822 a French geologist, Pierre Berthier (1782-1861), discovered a reddish coloured mineral containing about 50 per cent aluminium oxide (alumina) near the village of Les Baux in southern France.

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