calcined alumina

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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

• ac|ti|vat|ed alumina — «AK tuh VAY tihd», a partially calcined form of aluminum oxide, used as a dehydrating and adsorbing agent …   Useful english dictionary

• aluminum processing — Introduction       preparation of the ore for use in various products.       Aluminum, or aluminium (Al), is a silvery white metal with a melting point of 660° C (1,220° F) and a density of 2.7 grams per cubic centimetre. The most abundant… …   Universalium

• National Aluminium Company — Limited Logo of National Aluminium Company Limited Traded as NSE: NATIONALUM BS …   Wikipedia

• Aluminium oxide — Alumina redirects here. For the company, see Alumina Limited. This article is about aluminium(III) oxide Al2O3. For other uses, see Aluminium oxide (disambiguation). Aluminium oxide …   Wikipedia

• industrial glass — Introduction       solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …   Universalium

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

• steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …   Universalium

• cement — cementable, adj. cementer, n. cementless, adj. /si ment /, n. 1. any of various calcined mixtures of clay and limestone, usually mixed with water and sand, gravel, etc., to form concrete, that are used as a building material. 2. any of various… …   Universalium

• Bayer process — The Bayer process is the principal industrial means of refining bauxite to produce alumina.Bauxite, the most important ore of aluminium, contains only 30 54% alumina, Al2O3, the rest being a mixture of silica, various iron oxides, and titanium… …   Wikipedia

• Deville process — The Deville process was the first industrial process used to produce alumina from bauxite. The Frenchman Henri Sainte Claire Deville invented the process in 1859. It is sometimes called the Deville Pechiney process. It is based on the extraction… …   Wikipedia