Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Stafford, Phillip T.
Tungsten, pp. 949-963 ff. PDF (1.4 MB)
Table 2.—U.S. Government tungsten stockpile material inventories and goals (Thousand pounds of contained tungsten) . Material ~ Goals1 Inventory by program, Dec. 31, 1979 National stockpile DPA2 inventory Supplemental T ta!3 ° Tungsten concentrate: Stockpilegrade Nonstockpile grade Total Ferrotungsten: Stockpilegrade Nonstockpilegrade Total3 Tungsten metal powder: Stockpilegrade Nonstockpile grade Total Tungsten carbide powder: Stockpilegrade Nonstockpilegrade Total3 8823 ~ 55292 30,928 999 359 3196 1,043 59487 32,330 8,823 86,219 1,359 4,239 91,817 17,769 841 1,185 841 1,185 17,769 2,025 2,025 ' 3,290 . 1,567 332 ~. . 1,567 332 3,290 1,899 . 1,899 12,845 ~ 842 112 1,080 ~ 1,921 112 12,845 953 1,080 2,033 950 MINERALS YEARBOOK, 1978-79 pounds was for domestic use and 150,000 pounds was for export. Additionally, during January, February, and March 1978, supplemental offerings of excess concentrate were made on the basis of monthly sealed bids at the rate of 200,000 pounds of contained tungsten per month of which 150,000 pounds was for domestic~ use and 50,000 pounds was for export. From April 1978 through yearend 1979, the supplemental offerings were increased to 400,000 pounds of contained tungsen per month, of which 300,000 pounds was for domestic use and 100,000 pounds was for export. Concentrate sales in 1978 totaled 4,161,958 pounds of tungsten, of which 2,545,239 pounds was for domestic use and 1,616,719 pounds was for export. In 1979, sales totaled 5,619,354 pounds of tungsten, of which 3,234,888 pounds was for domestic use and 2,384,466 pounds was for export. Actual shipment of excess concentrate from the Government stockpile totaled 5,559,912 and 6,362,517 pounds of contained tungsten in 1978 and 1979, respectively. Government stockpile goals in effect during 1978-79 remained as revised on October 1, 1976, and reaffirmed on October 7, 1977 (table 2). About 31.9 million pounds of excess tungsten in concentrate were retained to offset shortfalls in the Government stockpile goals of ferrotungsten, tungsten metal powder, and tungsten carbide. 1Goals established Oct.1, 1976 and reaffirmed in 1977. 2Defense Production Act(DPA). 3Data may not add to totals shown because of independent rounding. DOMESTIC PRODUCTION Domestic mine production and shipments of tungsten in concentrate in 1978 increased 15% over those of 1977, but each decreased 4% in 1979 from those in 1978. Concentrate production and shipments were reported in Alaska and 7 Western States from 68 mines in 1978 and from 50 mines in 1979. However, only three mines operated continuously throughout 1978 and 1979: The Pine Creek mine and mill of the Metals Division, Union Carbide Corp. (UCC), located northwest of Bishop, Calif., in Inyo County; the Climax mine and mill of Climax Molybdenum Co., a division of AMAX Inc., at Climax, Cob., in Lake County; and the Emerson mine and mill of the Metals Division, UCC, at Tempiute, Nev., in Lincoln County. The principal metal mined and concentrated at Pine Creek continued to be tungsten, with minor amounts of byproduct copper, gold, molybdenum, and silver. UCC processed the Pine Creek ore directly into APT, an intermediate tungsten product suitable for conversion to tungsten metal powder. Scheelite ore was processed at Tempiute to a low-grade tungsten concentrate and shipped to UCC's Pine Creek facility, where it was converted to APT.
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