impure metal

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• Impure Wilhelmina — Pays d’origine Suisse Genre musical Black / Pop Années d activité de 1996 à ... Site officiel http://www.impurenet.com/ Membres …   Wikipédia en Français

• Precious metal — A precious metal is a rare metallic chemical element of high economic value. Chemically, the precious metals are less reactive than most elements, have high luster, are softer or more ductile, and have higher melting points than other metals.… …   Wikipedia

• alkaline-earth metal — /al keuh luyn errth , lin /, Chem. any of the group of bivalent metals including barium, radium, strontium, calcium, and, usually, magnesium, the hydroxides of which are alkalis but less soluble than those of the alkali metals. [1900 05] * * * ▪… …   Universalium

• Yellow metal — Yellow Yel low (y[e^]l l[ o]), a. [Compar. {Yellower} (y[e^]l l[ o]*[ e]r); superl. {Yellowest}.] [OE. yelow, yelwe, [yogh]elow, [yogh]eoluw, from AS. geolu; akin to D. geel, OS. & OHG. gelo, G. gelb, Icel. gulr, Sw. gul, Dan. guul, L. helvus… …   The Collaborative International Dictionary of English

• shot metal — noun an alloy that is 98% lead and 2% arsenic; used in making small shot • Hypernyms: ↑alloy, ↑metal * * * noun : an alloy of 98 percent lead and 2 percent arsenic for making small shot * * * lead hardened with antimony and arsenic, used to… …   Useful english dictionary

• coarse metal — noun Impure cuprous sulphide obtained in the smelting process • • • Main Entry: ↑coarse …   Useful english dictionary

• zirconium — zirconic /zerr kon ik/, adj. /zerr koh nee euhm/, n. Chem. a metallic element found combined in zircon, baddeleyite, etc., resembling titanium chemically: used in steel metallurgy, as a scavenger, as a refractory, and as an opacifier in vitreous… …   Universalium

• Zone melting — is a method of separation by melting in which a molten zone traverses a long ingot of impure metal or chemical. In its common use for purification, the molten region melts impure solid at its forward edge and leaves a wake of purer material… …   Wikipedia

• Electrowinning — Electrowinning, also called electroextraction, is the electrodeposition of metals from their ores that have been put in solution or liquefied. Electrorefining uses a similar process to remove impurities from a metal. Both processes use… …   Wikipedia

• cupellation — cu·pel·la·tion (kyo͞o pə lāʹshən) n. A refining process for nonoxidizing metals, such as silver and gold, in which a metallic mixture is oxidized at high temperatures and base metals are separated by absorption into the walls of a cupel. * * *… …   Universalium

• Iron Age — This article is about the historical / archaeological period known as the Iron Age. For the mythological Iron Age, see Ages of Man. Iron Age This box: view · talk · …   Wikipedia