Alumina is extracted from bauxite by

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• alumina — /euh looh meuh neuh/, n. the natural or synthetic oxide of aluminum, Al2O3, occurring in nature in a pure crystal form as corundum. Also called aluminum oxide. [1780 90; < L alumin , s. of alumen ALUM1 + A4] * * * ▪ chemical compound… …   Universalium

• Aluminium smelting — is the process of extracting aluminium from its oxide alumina, generally by the Hall Héroult process. Alumina is extracted from the ore Bauxite by means of the Bayer process at an alumina refinery.This is an electrolytic process, so an aluminium… …   Wikipedia

• aluminium — noun /əˈluːmɪnəm,ˌæl.jʊˈmɪn.i.əm,ˌæl.jʊˈmɪn.jəm,ˌæl.(j)uˈmɪn.i.əm,ˌæl(j)uˈmɪn.j.əm/ A light, silvery metal extracted from bauxite, and a chemical element (symbol Al) with an atomic number of 13. Syn: alumium, E173, food colouring See Also:… …   Wiktionary

• Alum — This article is about the chemical compound. For other uses, see Alum (disambiguation). Bulk alum Alum (  / …   Wikipedia

• mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …   Universalium

• Natural resource economics — Economics …   Wikipedia

• Gallium — Infobox galliumGallium (pronEng|ˈgæliəm) is a chemical element that has the symbol Ga and atomic number 31. A soft silvery metallic poor metal, gallium is a brittle solid at low temperatures but liquefies slightly above room temperature and will… …   Wikipedia

• para — para1 /pah rah , pahr ah/, n., pl. paras, para. a former copper coin of Turkey, the 40th part of a piaster. [1680 90; < Turk < Pers para lit., piece] para2 /pah rah , pahr ah/, n., pl. paras, para. an aluminum bronze c …   Universalium

• vanadium processing — Introduction       preparation of the metal for use in various products.       Vanadium (V) is a grayish silver metal whose crystal structure is a body centred cubic (bcc) lattice, with a melting point of 1,926° C (3,499° F). The metal is used… …   Universalium

• Bunbury — ▪ Western Australia, Australia       town and seaport, southwestern Western Australia, south of Perth and Fremantle. It lies on the southern shore of Koombana Bay just below Leschenault Inlet, fed by the Collie and Preston rivers. Founded in 1843 …   Universalium

• Aluminium — Infobox aluminiumAluminium (Audio IPA|En uk aluminium1.ogg|ˌæljʊˈmɪniəm, IPA|/ˌæljəˈmɪniəm/) or aluminum (Audio IPA|En uk aluminum.ogg|/əˈluːmɪnəm/, see spelling below) is a silvery white and ductile member of the boron group of chemical elements …   Wikipedia