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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)


Page 950

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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