Ferroalloy

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ferroalloy

[¦fe·rō′al‚ȯi]
(metallurgy)
Any alloy containing iron, usually in major amount. Also known as ferrous alloy.

Ferroalloy

 

any of the intermediate metallurgical products that are alloys of iron with silicon, manganese, chromium, and other elements and that are used in the smelting of steel (for deoxidizing and alloying the molten metal, binding harmful impurities, imparting the desired structure and properties to the metal), as well as in the manufacture of other ferroalloys (converted ferroalloys). By convention, the ferroalloy group also includes certain alloys, such as silicomanganese and calcium-silicon, which contain iron only as an impurity and certain metals and nonmetals in technically pure form (metallic manganese, metallic chromium, crystalline silicon). Ferroalloys containing several components are described as complex.

With iron present, the reduction of the oxides of the critical element of the ferroalloy (Mn, Cr) by carbon occurs at a lower temperature, more rapidly, more completely, and with less expenditure of energy. The melting range of ferroalloys, with rare exceptions, is lower than that of the pure metal; this difference facilitates the ferroalloy’s dissolution in the molten steel and cuts down the losses of the critical element caused by oxidation. The cost of an element in a ferroalloy is lower than in the technically pure form. The content of ferroalloy components that is considered standard varies with the chemical composition of the raw materials and the conditions under which the ferroalloys are smelted and introduced into the molten steel.

V. A. BOGOLIUBOV

References in periodicals archive ?
[ClickPress, Tue Jul 30 2019] The focus of the manufacturing and metal working industries on ferroalloys has grown significantly in recent years, and shows no signs of abating.
The new ferroalloy plant will be one of the key ones in the field of metallurgy and will make a positive contribution to the socio-economic development of not only the region, but also the country as a whole, Mamin noted.
Specialist alloy producer Afarak Group Plc (HEL:AFAGR) (LSE:AFRK) on Wednesday provided an operational update and guidance on expected ferroalloys production.
OFZ produces a wide range of silicon and manganese ferroalloys, cored wires and by-products from ferroalloys production in its plant in Oravsky Podzamok in the Orava region.
Iran Ferroalloys Industries Company, based in Azna in Lorestan province, is the first and the biggest Iranian ferrosilicon producer founded in 1987.
Jugohrom Ferroalloys from Jegunovce is one of the biggest industries and one of the most significant exporters with highest capacity of employees in Polosko region.
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27 December 2013 - Russian mining and steel company Mechel OAO (MCX:MTLR) said today it had concluded the USD425m (EUR308m) sale of certain ferroalloys businesses to Turkish diversified industrial group Yildirim.
Los Angeles, CA, November 08, 2013 --(PR.com)-- Commodity Screen attended at the CRU Ryan's Notes Ferroalloys in Dana Point from the 27th until the 29th of October.
Tenova Pyromet specializes in the design and supply of AC and DC furnaces for the production of ferroalloys, platinum group metals, base metals, slag cleaning and alloy refining, and also designs and supplies plant equipment that is associated with furnaces such as material handling and pre-treatment, alloy conversion and refining, granulation of metal, matte and slag, furnace off-gas fume collection and treatment, and treatment of hazardous dusts and waste.
This 20-chapter handbook is aimed at students, plant engineers and managers, and researchers in electrometallurgy, mining, and steelmaking and focuses on the core principles and technology involved in processing ferroalloys. Contributors from Europe and South Africa provide background on ferroalloy basics, thermodynamics, the kinetics of reduction and general processing issues, electric furnace operations, environmental issues, and other general topics, followed by the theory and technology of ferroalloys with silicon, manganese, high carbon, and chromium, and minor ferroalloys like ferronickel, tungsten, molybdenum, vanadium, niobium, titanium, zirconium, boron, and rare-earth and alkaline-earth metals.
Saed-Mohammadi said that in near future Iran will be a center of producing and supplying various ferroalloys in the Middle East.