Ferroalloy


Also found in: Dictionary, Wikipedia.

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 ?
The ferroalloy plant and gas-turbine station are planned to be built in the territory of the industrial zone of Kyzylorda," he said.
Target: Voskhod Mining Plant, Tikhvin Ferroalloy Plant
Its business risk profile is largely supported by the inherent flexibility of selling its power on merchant basis as opposed to captive consumption for the ferroalloy business.
Local governments and power suppliers must cancel any ongoing favourable power prices to aluminium, ferroalloy and calcium carbide makers at a designated date, and any preferential power rates in the name of direct trade between power generators and power users but without any approvals must be halted immediately, the report said.
Umetal offers a total key for iron ore, ferroalloy, scrap & pig iron and steel markets, which is the unique and special service mode in Chinese web industry.
The reason of present situation with production of a number of ferroalloys consists in absence of mineral kinds of raw materials and use at full capacity of all ferroalloy furnaces.
said it has given up trying to rehabilitate on its own as the declining ferroalloy market, coupled with what it says is a global slump in the information technology (IT) sector, dealt a severe blow to its overall operations.
Ferroalloy Production: Brazil, China, France, Norway, and South Africa were the among countries in which changes that would affect productive capacity were underway.
An representative of the ferroalloy factory confirmed a protest took place, but told Kyodo News on Tuesday the protesters only amounted to between 200 to 300 workers.
He has been an integral part in helping to make Georgian American Alloys a market leader in the ferroalloy industry.
The Ambassador noticed South Korea plans to open a KOICA office in Bishkek in the near future and expressed hope for successful implementation of the project to open the ferroalloy plant in Tash-Kumyr.
In particular, Mechel will sell its Voskhod mining plant in Khromtau, Kazakhstan as well as its Tikhvin ferroalloy facility in Russia's Leningrad region.