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slag |
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slag: see metallurgy metallurgy (mĕt`əlûr'jē), science and technology of metals and their alloys . ..... Click the link for more information. . slagBy-product formed in smelting, welding, and other metallurgical and combustion processes from impurities in the metals or ores being treated. Slag consists mostly of mixed oxides of elements such as silicon, sulfur, phosphorus, and aluminum; ash; and products formed in their reactions with furnace linings and fluxing substances such as limestone. During smelting or refining, slag floats on the surface of the molten metal, protecting it from oxidation (see oxidation-reduction) by the atmosphere and keeping it clean. Slag cools into a coarse aggregate used in certain concretes; it is used as a road-building material, as ballast, and as a source of available phosphate fertilizer. slag 1. the fused material formed during the smelting or refining of metals by combining the flux with gangue, impurities in the metal, etc. It usually consists of a mixture of silicates with calcium, phosphorus, sulphur, etc. 2. a mass of rough fragments of pyroclastic rock and cinders derived from a volcanic eruption; scoria slag [slag] (metallurgy) A nonmetallic product resulting from the interaction of flux and impurities in the smelting and refining of metals. Also known as bloom. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Great heaps of slag and dumps of cinders loomed up on each side, with the high shafts of the collieries towering above them. The very furniture in the room seemed to have shrunk since she saw it before: the slag in the tapestry looked more like a ghost in his ghostly blue-green world; the volumes of polite literature in the bookcase looked more like immovable imitations of books. This is a gentleman,--and proffers civilities without end; but all the rest are slag and refuse. |
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