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Bureau of Mines / Minerals yearbook: Metals and minerals 1977
Year 1977, Volume 1 (1977)

Absalom, Sandra T.
Boron,   pp. 191-200 PDF (1.2 MB)


Page 191

  191Boron 
By Sandra T. Absalom1 
 U.S. production and sales of boron mine- (paper wool) consumed anot~ier
15%, and rals increased dramatically in 1977, attain- textile-grade glass
fibers and borosilicate ing an alitirne high of 1 5 million tons glasses
accounted for 12% each While the valued at $236 million. Unprecedented mar-
three classifications of glasses have historkets for energy-saving materials,
spurred by ically accounted for about half of the anrising fuel prices and
the national energy nual borate consumption use of borates as conservation
program were responsible for flame retardants for cellulosic materials the
strong demand for borates in insulation became a major end use in 1977 
products and glass fiber reinforced plastics California was the domestic
source of Production of borate minerals and corn borate minerals mostly in
the form of pounds approached capacity levels of the sodium borate but also
as calcium borate major producers with respect to boric acid and sodium-calcium
borates Imports from insufficient domestic capacity to satisfy the Turkey
of calcium borate (colemanite) pri demand of the cellulosic insulation industry
manly for textile-grade fiberglass manu resulted in a sigrnficant quantity
of imports facture nearly doubled in 1977 Although for the first time in
history domestic markets for berates were extreme 
 Fiberglass insulation (glass wool) mate ly active the United States provided
most rials constituted the largest end use for of the domestic supply while
maintaining berates representing more than one-fifth of its position as the
primary source of sodium the total U S consumption of 121 090 short borate
products and boric acid to foreign tons of boron content Cellulosic insulation
markets 
Table 1.—Salient boron minerals and compounds statistics in the
United
States 
(Thousand short tons and thousand dollars) 
. 
1973 
1974 
1975 
1976 
1977 
Sold or used by producers: 
 Quantity: 
Grossweight                          
Boron oxide, content                    
1,225 
664 
1,185 
619 
1,172 
603 
1,246 
630 
1,469 
735 
Boron,content                         
207 
193 
188 
196 
228 
 Value                                Imports for consumption: 
 Colemanite: 
$113,648 
$128,306 
$158,772 
$184,852 
$236,163 
 Quantity                             
 Value                              Boric acid: 
 18 
$568 
 21 
$852 
 28 
$1,560 
30 
$1,953 
51 
$3,695 
Quantity                             
(1) 
(1) 
(1) 
(1) 
14 
Value                               
$3 
$149 
$59 
$14 
$5,596 
than 1/2 unit. 
DOMESTIC PRODUCTION 
 Production and sales (including exports) in value in 1977. Kern County,
Calif., proof boron-containing minerals and corn- vided about three-quarters
of the supply pounds increased 18% in tonnage and 28% and San Bernardino
and Inyo Counties 


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