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

Chin, E.
Magnesium compounds,   pp. 747-755 ff. PDF (796.7 KB)


Page 751

MAGNESIUM COMPOUNDS 
751 
higher than in 1971. However, shipments to Mexico, Peru, and Spain in 1972
were substantially lower than those of 1971. 
 Exports of magnesite, including crude, caustic-calcined, lump or ground,
decreased slightly from exports in 1971. Deliveries to West Germany, Canada,
Italy, the United Kingdom, and Australia accounted for over 50% of the exports
in this dass. 
 Imports for consumption of lump or ground caustic-calcined magnesia decreased
10% in 1972 to 10,376 tons. Imports in this class were principally from India
and Turkey. 
 Imports of dead-burned and grain magnesia and periclase containing a maximum
of 4% lime increased 10% to 127,776 tons in 1972. Imports for the same class
of material but containing over 4% lime decreased from 13,146 tons in 1971
to 5,958 tons in 1972. Total imports of magnesite increased 4% over those
in 1971 to 133,734 tons. 
 Imports of unspecified magnesium chloride, magnesium sulfate, and magnesium
salts and compounds decreased substantially in 1972 compared to imports in
these classes in 1971. Imports of precipitated magnesium carbonate and magnesium
oxide increased slightly over those in 1971. 
 The tariff on various magnesium compounds was as follows: 
Item 
1971 
1972 
Magnesite: 
 Crude per ton... 
 Caustic-calcined - - do_ - - Magnesium carbonate: 
 Precipitated 
 cents per poun&_ 
 Not precipitated-% 
valorem             
Magnesium chloride: 
 Anhydrous 
  cents per pound - Other do.... 
$3.15 
$6.30 
0.25 
'  
5% 
.6 
.25 
$2.62 
$5.25 
0.25 
4% 
.5 
.21 
Magnesium oxide: 
 Calcined magnesia.. do - -- 
1.2 
1 
Magnesium sulfate: 
 Epsom salts ~ 
.225 
.187 
Table 5.—U.S. exports of magnesite and magnesia, by country 
Destination 
Mag 
nesite and magnesia, dead-burned 
Magnesite, n.e.c., including crude caustic-calcined, lump or ground 
1971 
1972 
 1971 1972 
Quantity (short 
tons) 
Value Quantity Value 
(thou- (short (thou- 
sands) tons) sands) 
Quantity Value Quantity Value 
(short (thou- (short (thou- 
tons) sands) tons) sands) 
Argentina              
Australia               
Belgium-Luxembourg      
Brazil                 
Canada               
Chile                  
Colombia               
Costa Rica              
Denmark              
El Salvador             
Finland                
France                 
Germany, West          
Honduras              
Israel                   
Italy                    
Japan                   
Mexico                  
Netherlands              
New Zealand             
Peru                    
Philippines               
South Africa, Republic of. - - 
Spain                    
Sweden                  
Switzerland               
Taiwan                
U.S.S.R                
United Kingdom         
Venezuela              
Yugoslavia              
Other                 
 330 
 120 
- - 
 28 
40,586 
975 
- - 
- - 
5 
62 
157 
 56 
- - 
44 
5,679 
50 
36 
1,667 
3 
81 
2,432 
76 
- - 
-- 
 718 
 305 
- - 
 38 
 $49 774 $115 68 20 9 -- - - - - 7 11 6 4,040 51,694 5,064 97 329 22 -- --
-- --  - - -- - - - - 1 5 1 -- 6 4 9 50 5 81 180 98 8 -- -- -- - - - - --
18 15 27 55 39 569 7 4 7 48 17 23 32 21 154 -- -- 1 27 7 52 104 75 224 1
(1) 42 72 50 -- 16 3 
 -- -- -- -- -- -- 397 566 321 32 50 7 -- - - - - 9 94 20 
 80 $34 113 $51 450 254 442 237 107 44 87 36 52 24 122 57 893 360 1,105 486
121 82 75 23 12 6 19 10 262 27 1 (' ) 34 19 28 17 550 55 - - - - 89 35 181
100 274 103 342 209 890 445 1,269 598 -- -- 25 4 27 14 29 15 592 258 701
332 47 13 26 14 102 19 78 22 264 87 182 72 116 67 125 81 5 2 12 6 105 33
5 3 314 174 200 94 281 82 151 63 310 212 362 262 62 22 51 20 -- -- 168 52
-- -- 54 42 755 318 684 297 66 14 154 20 11 7 80 53 179 80 216 101 
Total             
53,448 
 5,897 54,159 5,903 
7,050 2,840 7,037 3,377 
1 Less than 34 unit. 


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