bauxite


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bauxite

(bôk`sīt, bŏk`–), mixture of hydrated aluminum oxides usually containing oxides of iron and silicon in varying quantities. A noncrystalline substance formerly thought to be a mineral, bauxite is claylike and earthy and ranges in color from white to deep brown or red according to the nature and quantity of its components. Bauxite occurs characteristically in pisolitic form, i.e., composed of small, round concretions. Its composition varies, alumina constituting from about 50% to about 70%. First discovered in Les Baux, France, bauxite is widely distributed, with important deposits occurring in Africa, South America, Russia, the West Indies, and the United States (Alabama, Arkansas, and Georgia). It is the chief source of aluminum and of its compounds, including alumina, alums, and alundum. It is used in the preparation of abrasives and as a refractory for spark plugs and furnace linings.

bauxite

[′bȯk‚sīt]
(petrology)
A whitish, grayish, brown, yellow, or reddish-brown rock composed of hydrous aluminum oxides and aluminum hydroxides and containing impurities such as free silica, silt, iron hydroxides, and clay minerals; the principal commercial source of aluminum.

bauxite

a white, red, yellow, or brown amorphous claylike substance comprising aluminium oxides and hydroxides, often with such impurities as iron oxides. It is the chief ore of aluminium. General formula: Al2O3.nH2O
References in periodicals archive ?
Table 2: Global Abrasive Products Market by End-useApplications (2012): Percentage Breakdown of Value Sales forMetal Fabrication, Automotive, Industrial, Construction,Defense & Military, Power Generation, Woodworking,Aerospace, Electronics Goods, Paper & Pulp, ConsumerElectric Appliances, Optics & Optoelectronics, Medical &Research, and Others (includes corresponding Graph/Chart) II-5Impact of Indonesian Bauxite Exports Ban II-5Global Production and Reserve Scenario II-6Bauxite II-6Table 3: Global Bauxite Production (2012 & 2013): Breakdownof Mine Production in Thousand Metric Tons by LeadingBauxite Producing Countries (includes correspondingGraph/Chart) II-6
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The Global Bauxite Mining Industry Report 2015 is a professional and in-depth study on the current state of the Bauxite Mining industry with a basic overview of the market including definitions, classifications, applications and industry chain structure.
The circular notes that while bauxite is currently classified as a Group C cargo (cargoes that do not liquefy or possess a chemical hazard) under the International Maritime Solid Bulk Cargoes (IMSBC) Code, there is a need to raise awareness of the possible dangers of liquefaction associated with bauxite.
According to the test results, the Bauxite 40/50 aggregate exhibited a surface area half of silica, indicating sintered bauxite could require less binder, though not in the same percentage reduction, based on the baseline surface area of silica sand.
Study of the FAR Bauxite Project base case indicates a positive NPV
Bauxite is created naturally and initially compact homogeneous material are combined with one or more types of aluminum hydroxide minerals and finally, compounds such as silicon dioxide (SiO2) and iron oxide (Fe2O3), titanium oxide (TiO2) and aluminosilicate, and other detectable impurities can be observed within the bauxite.
Bauxite resources held by Bauxite Resources Limited ("BRL") and its joint ventures partner's totals 338Mt - Resources are near surface, situated close to existing road and rail and port infrastructure.
This maiden resource is contained within both the Bauxite Alumina Joint Ventures ('BAJV') area with Yankuang Resources Ltd ('Yankuang') where the Company holds a 30% beneficial interest in bauxite rights and the Shandong Joint Venture area with Shandong #1 Bureau of Geology & Minerals Exploration ('Shandong') where Shandong can earn up to 60% of bauxite rights upon completion of certain milestones.
The centre of bauxite production in Indonesia is Bintan Island in Riau.
Overview of the Brazil Bauxite mining industry, with detailed information about production, reserves, consumption and trade
5 million tonnes of bauxite, the main ingredient in aluminium, will be mined by Australian Bauxite Limited (ABx) and shipped through Bell Bay for both domestic and international markets.