U of M GEOL 2350 - TUNGSTEN (2 pages)

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TUNGSTEN



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TUNGSTEN

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Pages:
2
School:
University of Minnesota- Twin Cities
Course:
Geol 2350 - Earth's Resources

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178 TUNGSTEN Data in metric tons of tungsten content unless otherwise noted Domestic Production and Use The last reported U S production of tungsten concentrates was in 1994 In 2006 approximately nine companies in the United States processed tungsten concentrates ammonium paratungstate tungsten oxide and or scrap to make tungsten powder tungsten carbide powder and or tungsten chemicals Approximately 65 industrial consumers were surveyed on a monthly or annual basis Data reported by these consumers indicate that more than one half of the tungsten consumed in the United States was used in cemented carbide parts for cutting and wear resistant materials primarily in the metalworking mining oil and gas drilling and construction industries The remaining tungsten was consumed to make tungsten heavy alloys for applications requiring high density electrodes filaments wires and other components for electrical electronic heating lighting and welding applications steels superalloys and wear resistant alloys and chemicals for various applications The estimated value of apparent consumption in 2006 was 470 million Salient Statistics United States Production Mine Secondary Imports for consumption Concentrate Other forms Exports Concentrate Other forms Government stockpile shipments Concentrate Other forms Consumption Reported concentrate Apparent 1 all forms Price concentrate dollars per mtu WO3 2 average U S spot market Platts Metals Week European market Metal Bulletin Stocks industry yearend Concentrate Other forms Net import reliance3 as a percentage of apparent consumption 2002 2003 2004 2005 2006e 4 380 4 130 4 000 4 640 4 500 4 090 6 510 4 690 7 620 2 310 8 240 2 080 9 070 2 100 10 200 94 3 220 20 5 070 43 3 730 52 5 890 190 7 100 1 140 177 710 182 979 80 2 310 404 3 500 16 W 11 900 W 10 100 W 12 600 W 11 600 W 13 200 55 38 50 45 49 55 146 123 205 165 W 1 610 W 1 820 W 1 780 W 2 300 W 2 100 69 63 73 68 66 Recycling In 2006 the tungsten contained in scrap consumed by



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