Ferrotungsten

ferrotungsten

[¦fe·rō′təŋ·stən]
(metallurgy)
A crude ferroalloy containing tungsten and used in steelmaking.

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.

References in periodicals archive ?
The final tungsten concentrate obtained meets the specifications required to produce tungsten metal, ferrotungsten and tungsten based chemicals (Guar, 2006).
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.
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.
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.
In this review consumption is defined as being the actual usage of concentrates, or in the case of MECs, the combination of concentrates used and MEC usage of intermediate products (tungstate, oxide, ferrotungsten) imported into MECs from China and Russia.
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).
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.
Consumption, for this review, is the actual usage of concentrates, or in the case of MECs, the combination of concentrates used and MEC usage of intermediate products (tungstates, oxide, ferrotungsten) imported into MECs from China and Russia.
For the purposes of this analysis, consumption is defined as the actual usage of concentrates, or in the case of MECs, the combination of concentrates used and MEC usage of intermediate products (tungstates, oxide, ferrotungsten) imported into MECs from China and Russia.
China developed large production capacity for APT and ferrotungsten (FeW) around the mid-1980s.
TUNGSTEN IMPORTS (mt tungsten content) Chinese Market Year Total(*) Chinese Supply Share (%) 1986 4,365 1,750 40.1 1987 6,619 3,041 45.9 1988 10,723 6,368 59.4 1989 9,886 7,237 73.2 1990 7,647 5,302 69.3 (*)Includes Imports of concentrate, tungstates, ferrotungsten Robert M.