Tungsten's News

Metal Prices in the United States through 1998-Tungsten

Details: Category: Tungsten Statistics Data; Published on Monday, 31 December 2012 14:35

Tungsten' price and related elements have been introduced in this article through 1998.

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Materials Flow of Tungsten in the United States

Details: Category: Tungsten Statistics Data; Published on Monday, 31 December 2012 11:50

Because of continuing concerns regarding the effects of cumulative quantities of materials in the environment, the Bureau of Mines has initiated a series of studios to evaluate, to the fullest extent possible, all aspects of the materials flow sequence for selected commodities. Although tungsten and its compounds do not pose a significant health hazard to the environment, they do represent valuable resource materials to which appropriate conservation considerations must be given. The present study includes a description of recent trends in the consumption, loss, and recycling of tungsten-containing materials in the United States during the period 1974-1991 and an estimation of the cumulative loss of tungsten to the environment since 1910. Obsolete tungsten is recycled primarily as cemented tungsten carbide components that have been used in cutting and wear-resistant applications. The quantity recycled, as a percentage of annual U.S. consumption of tungsten, was estimated to have increased from 10% in 1974 to 34% in 1991. An estimated 58% of the 348,000 metrice tons of primary tungsten concumed since 1910 was lost to the enviroment through means such as dissipation, discard, and dilution.

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USGS International Strategic Mineral Issues Summary Report - Tungsten

Details: Category: Tungsten Statistics Data; Published on Monday, 31 December 2012 11:24

Scheelite and wolframite are the principal minerals currently mined for tungsten. Both occur in hard-rock
deposits; wolframite is also recovered from placer deposits. Most current mine production of tungsten is from vein/stockwork, skarn, porphyry, and strata-bound deposits. Minor amounts are produced from disseminated, pegmatite, breccia, and placer deposits. Most tungsten is used to make tungsten carbide and tungsten alloys for use in machine tools and drilling equipment. Other important applications are in lamp filaments and cathodes, high-speed steels, textile dyes, paints, and catalysts.

The world is well endowed with tungsten resources. China and the former Soviet Union have 8 of the world’s 10
largest deposits; these 8 contain about half of the world’s resources of tungsten. If economic conditions are suitable, world tungsten resources in known deposits and their extensions (categories R1 and R2), including economic, marginal, and subeconomic resources, are sufficient to permit world production to continue at 1995 levels until well into the 21st century.

World tungsten resources in identified deposits and districts that are currently economically exploitable (category R1E) appear to be sufficient to meet world demand at 1995 levels only until the year 2007. However, the figure for resources of this kind does not include or reflect resources whose economic parameters are unknown in major producing areas in the former Soviet Union, China, and other nonmarket-economy countries and thus severely underestimates future tungsten availability.

In 1995, China and the former Soviet Union accounted for over three-fourths of the world’s mine production of
tungsten. China alone produced about two-thirds of world output. Given its vast resources, China will likely maintain its prominent role in world tungsten supply. By the year 2020, changes in supply patterns are likely to result from declining output from individual deposits in Australia, Austria, and Portugal and the opening of new mines in Canada, China, and the United Kingdom.

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USGS Annual Tungsten Commodity Summaries in 2012

Details: Category: Tungsten Statistics Data; Published on Friday, 28 December 2012 14:34

Collected by Chinatungsten Online- Tungsten Commodity Summaries from United States Geological Surveys concludes related data and information of tungsten and tungsten products in current year.

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