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Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)

Petkof, Benjamin
Magnesium compounds,   pp. 567-575 ff. PDF (712.5 KB)


Page 567

  567Magnesium Compounds 
By Benjamin Petkof' 
 The United States retained its place as a major world producer of magnesium
compounds in 1978 and 1979~ Domestic output was based chiefly on the production
of magnesia from natural brines. The total quantities of magnesium compounds
shipped and used in 1978 and 1979 increased over those of 1977. Total exports
of magnesite and magnesia increased in 1978 and 1979 over those of 1977,
and total imports of magnesite increased in 1978 and 1979 over those of 1977.
 Austria, Greece, Mainland China, North Korea, and the U.S.S.R. were major
world sources of magnesite. 
 Legislation and Government Programs.—New tariff rates resulted
for
some classes of magnesium compounds from the 1979 Tokyo Round of tariff negotiations
giving most nations "most-favored-nation" status. The tariffs for
material
from these nations will decline annually, in stages, beginning January 1,
1980, and ending January 1, 1987. 
Table 1.—Salient magnesium compound statistics 
(Thousand short tons and thousand dollars) 
1975 
1976 
1977 
1978 
1979 
United States: 
: 
Caustic-calcined and specified magnesias:' Shipments by producers: 
Quantity                                    
Value                                    
 Exports: Value2                             Imports for consumption: Value2
                  Refractory magnesia: 
Sold and used by producers: 
Quantity                                    
Value                                    
 Exports: Value                              Imports: Value             
                  Dead-burned dolomite: 
120 
$17,207 
$4,538 
$502 
709 
$103,839 
$14,146 
$20,588 
134 
$28,277 
$5,422 
$808 
768 
$106,522 
$13,466 
$13,976 
129 
$29,574 
$6,336 
$566 
690 
$94,799 
$16,477 
$12,332 
156 
$43,008 
$7,741 
$793 
796 
$125,082 
$10,617 
$14,421 
164 
$50,047 
$16,433 
$1,169 
847 
$125,289 
$8,182 
$13,546 
Sold and used by producers: 
Quantity                                    
Value                                      
World: Crude magnesite production: Quantity              
914 
$31,193 
riO 614 
 1,007 
$37,079 
09933 
968 
$37,992 
010706 
1,016 
$45,881 
10,704 
793 
$41,676 
11,086 
Revised. 
' Excludes caustic-calcined magnesia used in production of refractory magnesia.
2Caustic-calcined magnesia only. 
DOMESTIC PRODUCTION 
 Natural brine solutions, from seawater, lakes, and wells, continued to be
the primary source of domestically produced magnesium compounds. Natural
magnesite and olivine were produced at a few operations in the United States.
Natural magnesite was also converted to magnesium compounds. 
Olivine was comminuted to various grades for foundry use. 
 The Velsicol Chemical Corp. discontinued magnesium compound operations as
of September 1978. 
 Most of the firms that produced magnesium hydroxide also produced other
magne 


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