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(chemical engineering)
The removal of sulfur, as from molten metals or petroleum oil.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a combination of physicochemical processes that promote the removal of sulfur from molten metal (cast iron, steel). It consists in converting the sulfur dissolved in the metal to sulfides that are either insoluble or poorly soluble in the liquid metal bath (for example, MnS, MgS , CaS, and Na2S). Examples of desulfurizers are lime, sodium carbonate, and metallic magnesium.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Early cupolas used acid and soda ash to desulfurize. Because of environmental and quality reasons, cupolas producing ductile iron base metal were converted to basic operations.
Unlike ACIPCO, who perfected the basic slag cupola, Clow, according to Kirgin, was the first company to continually externally desulfurize ductile iron to prepare it for Mg treatment, which is the predominant method used for cupola-melted iron today.
Jensen tells me the foundry doesn't desulfurize, and their key to quality ductile iron is buying good scrap and pig iron and tightly controlling chemistries.
The technique was used to desulfurize, nodulize and preinoculate molten iron.
Generally, the higher the sulfur content, the more nodulizing agent required-first, to desulfurize the metal bath, and second, to leave enough residual nodulizing material for the formation of spherical graphite.