Encyclopedia

Ferrotungsten

ferrotungsten

[¦fe·rō′təŋ·stən]
(metallurgy)
A crude ferroalloy containing tungsten and used in steelmaking.
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 It might be outdated or ideologically biased.

Ferrotungsten

 

a ferroalloy consisting of either 68–72 percent or 78–86 percent W and up to 7 percent Mo (Fe and impurities constituting the remainder). Ferrotungsten is produced in ore heat-treating furnaces by a combination of silicothermic and carbothermic-reduction processes from wolframite and scheelite concentrates. The ferrotungsten is scooped out of the furnace by the steel ladles of a special machine. High-grade ferrotungsten is smelted so as to form a block, which after cooling is broken down. Ferrotungsten is used mainly in the production of tool steels (high-speed steel) and heat-resistant alloys.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
The final tungsten concentrate obtained meets the specifications required to produce tungsten metal, ferrotungsten and tungsten based chemicals (Guar, 2006).
Flotation study on scheelite ore of Chitral, Khyber Pakhtoonkhwa, Pakistan
We looked for a better technology of manufacturing the chemically clean hexachlorid of tungsten ([WCl.sub.6]) through chlorination of ferrotungsten. Then, in the 1970's, I continued this experimental research study at the Baikov Institute of Metallurgy, Russian Academy of Sciences.
Study of the Experimental Method of Manufacturing the Hexachloride of Tungsten through Chlorination of Ferrotungsten and Tungsten.
From the chloride of tungsten to the upper limit of the periodic table of elements
The Pre-feasibility Study for the Big Hill Tungsten Deposit confirmed Big Hill as a source of feedstock for the Company's majority-owned ATC Ferrotungsten Project in Vietnam, which is expecting its first production over the coming months.
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The website also reported that Chinese Government imposed export taxes varying from 5% to 15% on primary tungsten products on January 1 this year, including APT, tungsten carbonate, tungsten powder, ferrotungsten and scrap tungsten, as well as canceling export tax rebates on tungsten products.
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High-grade tungsten concentrates (>65% [WO.sub.3]) can be smelted directly with charcoal or coke in an electric arc furnace to produce ferrotungsten (Guar, 2006).
Beneficiation studies on low-grade Tungsten Ore of Chitral, Khyber Pukhtunkhwa, Pakistan
Hazelwood Resources Limited (ASX:HAZ), which has a majority stake in the ATC Ferrotungsten Project in Vietnam said that construction of the ferrotungsten refinery, which is the largest of its kind outside of China, is nearing completion.
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