- Basic oxygen furnace
A basic oxygen furnace, also known as an "LD converter", is the place within an integrated steel mill where molten iron from the blast furnace is changed into liquid
steel. LD is short for Linz-Donawitz, the names of the two towns in Austria, near the Voest-Alpine steelworks where the process was developed. [McGannon, p 26] The process is known as "basic" due to the pHof the refractories - calcium oxideand magnesium oxide- that line the vessel. The vast majority of steel manufactured in the world is produced using the basic oxygen furnace. Modern furnaces will take a charge of iron of up to 350 tons and convert it into steel in less than 40 minutes.
oxygenis blown into the furnace or BOS vessel through a vertically oriented water-cooled lance. [McGannon, p 486] This oxidizes carbonand the other unwanted elements in the hot metal. Carbon is oxidised to carbon monoxide gas, which passes from the converter to a cleaning plant. After cleaning, it can be re-used as a fuel gas. The rest of the elements in the metal are converted to acidic oxides. They combine with the lime and other fluxes that are added during the blow - mainly to neutralise the acidic oxides and prevent excessive wear of the lining. This produces a slagthat floats on the surface of the metal.
The steel is tapped from the furnace when it is at the correct temperature and composition. The furnace is tilted and the molten metal is run out via the taphole into a ladle. Once the steel has been removed, the furnace is turned upside down and the slag that is left inside runs into another ladle. The solidified slag can be used in the production of cement and as an aggregate in road building.
The first company in the U.S. to use this type of furnace was
McLouth Steelin Trenton, Michigan.
McGannon, Harold E. editor (1971). "The Making, Shaping and Treating of Steel: Ninth Edition". Pittsburgh, Pennsylvania: United States Steel Corporation.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Basic oxygen furnace — Basic oxygen furnace. См. Основной кислородный конвертер. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
basic oxygen process — a high speed method of steelmaking in which oxygen of high purity is blown through an oxygen lance at high velocity onto the surface of a bath containing steel scrap and molten pig iron within a vessel with a basic lining (basic oxygen furnace).… … Universalium
basic oxygen process — a high speed method of steelmaking in which oxygen of high purity is blown through an oxygen lance at high velocity onto the surface of a bath containing steel scrap and molten pig iron within a vessel with a basic lining (basic oxygen furnace) … Useful english dictionary
Basic oxygen steelmaking — ( BOS, BOF, Linz Donawitz Verfahren, LD converter ) is a method of steelmaking in which carbon rich molten iron is made into steel. The process is an improvement over the historically important Bessemer process. The LD converter is named after… … Wikipedia
Furnace (disambiguation) — * Furnaces as a general subject. *Furnaces used in smelters, including: * Blast furnace * Steelmaking furnaces, including: ** Puddling furnace ** Reverberatory furnace ** Bessemer converter ** Open hearth furnace ** Basic oxygen furnace **… … Wikipedia
Furnace — For other uses, see Furnace (disambiguation). Industrial Furnace from 1907 A furnace is a device used for heating. The name derives from Latin fornax, oven. In American English and Canadian English, the term furnace on its own is generally used… … Wikipedia
furnace — I (New American Roget s College Thesaurus) n. See heat. II (Roget s IV) n. Syn. heater, heating system, boiler, hot air furnace, steam furnace, hot water furnace, oil burner, gas furnace, electric furnace, annealing furnace, kiln, reduction… … English dictionary for students
basic process — noun : a process (as in steelmaking) carried on in a furnace lined with basic material (as magnesite, dolomite, lime, or iron oxide) and under a slag that is dominantly basic opposed to acid process; compare bessemer process * * * basic( oxygen)… … Useful english dictionary
basic — /bay sik/, adj. 1. of, pertaining to, or forming a base; fundamental: a basic principle; the basic ingredient. 2. Chem. a. pertaining to, of the nature of, or containing a base. b. not having all of the hydroxyls of the base replaced by the acid… … Universalium
basic — /ˈbeɪsɪk/ (say baysik), Chiefly US /ˈbæsɪk/ (say basik) adjective 1. of, relating to, or forming a base; fundamental: a basic principle; a basic ingredient. 2. (of manufactured commodities) equipped with essential components, without optional… … Australian English dictionary