fluorspar slag
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Argon Oxygen Decarburization — (AOD) is a process primarily used in stainless steel making and other high grade alloys with oxidizable elements such as chromium, aluminum, etc. After initial melting the metal is then transferred to an AOD vessel where it will be subjected to… … Wikipedia
Fluorite — General Category Halide mineral Chemical formula CaF2 … Wikipedia
niobium processing — Introduction preparation of the ore for use in various products. Niobium (Nb) has a body centred cubic (bcc) crystal structure and a melting point of 2,468° C (4,474° F). Of the refractory metals, it has the lowest density and best… … Universalium
chemical industry — Introduction complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Although the chemical industry may be described simply as the industry that uses chemistry and… … Universalium
Industrial minerals — are geological materials which are mined for their commercial value, which are not fuel (fuel minerals or mineral fuels) and are not sources of metals (metallic minerals).They are used in their natural state or after beneficiation either as raw… … Wikipedia
Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… … Universalium
