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Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Sutton, Joseph A.
Columbium and tantalum,   pp. 461-471 ff. PDF (1.2 MB)


Page 466

466 MINERALS YEARBOOK, 1972 
$11 to $22 per pound for metallurgicalgrade material, and $12 to $23 per
pound for reactor-grade material. Columbium ingot was quoted at $16 to $27
per pound for metallurgical-grade material, and $17.50 
to $28.00 per pound for reactor-grade material. Tantalum metal was quoted
at $38.50 to $47.00 per pound for powder, $36 to $60 per pound for sheet,
and $36 to $50 per pound for rod. 
Table 7.—Average grade of concentrate received by U.S. consumers and
dealers 
in 1972, by country of origin 
(Contained pentoxides, %) 
 Columbite Tantalite 
 Cb,O, Ta2Oa Ta2Oa Cb2O~ 
Australia                                       
44 
31 
Belgium                                       Brazil"                   
58 
32 
40 
40 
29 
Canada'                                       
58 
51 
4 
Germany,West                                  
Kenya                                         
Malaysia'                                      
Mozambique                                    
Nigeria'                                        
Portugal                                        
Rwanda                                        
66 
62 
~ 
9 
4 
31 
40 
11 
40 
36 
29 
28 
28 
70 
30 
36 
41 
South Africa, Republic of                           
Spain                                         
Thailand'                                      
- - 
40 
29 
31 
25 
37 
30 
Uganda                                       Zaire                      
-- 
-- 
22 
35 
55 
33 
' Excludes tin slag. 
2 Material reported from Brazil or Canada as columbite represents primarily
pyrochiore. 
FOREIGN TRADE 
 Most of the columbium and tantalum exported from the United States was received
by West Germany, Japan, and the United Kingdom. Tantalum and tantalum alloy
powder, the largest export item by quantity and value, was shipped to Japan
(29%), West Germany (24%), the United Kingdom (19%), France (11%), Italy
(6%), Austria (4%), and the Netherlands (3%) - The remainder of the tantalum
and tantalum alloy powder (4% of the total) was destined for Canada, Switzerland,
Australia, India, Sweden, New Zealand, and Belgium-Luxembourg. Unwrought
tantalum alloys in crude form and scrap, the second largest export item by
volume, was destined *for West Germany (55%), Japan (16%), the United Kingdom
(11%), Italy (5%), Belgium-Luxembourg (4%), and Austria (4%). The remainder
of this material (5% of the total) was exported to France, Canada, Mexico,
Brazil, Norway, and the Netherlands. Wrought tantalum and tantalum alloys,
the second largest export item by value, was shipped to the United Kingdom
(23%), Japan (19%), France (17%), West Germany (16%), Switzerland (7%), Canada
(5%), and Italy (4%) - The remainder of the tan- 
talum material (9% of the total) was exported to Austria, the Netherlands,
Mexico, Belgium-Luxembourg, India, Argentina, Australia, Brazil, Sweden,
Ireland, Israel, Gibraltar, and the Republic of South Africa. Tantalum ore
and concentrate, believed not to be of domestic origin, was shipped to Japan
(62%), the United Kingdom (29%), and West Germany (9%). Wrought columbium
and columbium alloys were mostly exported to West Germany (55%), Japan (17%),
the United Kingdom (9%), the Republic of South Africa (7%), Canada (6%),
and France (5%). The rest of this columbium material (1% of the total) was
exported to Belgium-Luxembourg, Italy, and Czechoslovakia. Unwrought columbium
alloys in crude form and scrap were shipped mostly to West Germany (68%),
Japan (16%), and Canada (11%); the remainder (5% of the total) went to Saudi
Arabia and Switzerland. 
Imports for consumption of unwrought 
columbium metal, waste, and scrap, all 
from West Germany, decreased from 450 
pounds valued at $7,227 in 1971 to 400 
pounds valued at $3,714 in 1972. In 1972 
imports for consumption of wrought co 


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