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)
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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