Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Reed, Avery H.
Gypsum, pp. 597-604 PDF (802.1 KB)
597Gypsum By Avery H. Reed' The gypsum industry operated at record levels in 1972. Output of crude and calcined gypsum set new annual records. Imports of crude gypsum were an alltime high. Sales of gypsum products were higher than for any other year. Republic Gypsum Co. reopened the Rosario mine and plant in Santa Fe County, N. Mex., and Temple Gypsum Co. corn- pleted its new processing plant at West Memphis, Ark. The gypsum resources of Oklahoma were described.2 Many companies were concerned about environmental problems at gypsum plants. Rigid air pollution standards could force extensive plant revisions. The disposal and possible use problems of waste gypsum at fertilizer plants were examined. Table 1.—Salient gypsum statistics (Thousand short tons and thousand dollars) 1968 1969 1970 1971 1972 United States: Active mines and plants ' Crude:' 115 114 108 107 108 Mined Value Imports for consumption Calcined: Produced Value Products sold (value) Exports (value) - Imports for consumption (value) World: Production 10,018 36,775 5,474 8,844 133,239 404,739 3,556 13,058 54,486 9,905 38,354 5.858 9,324 143,466 414,880 3,446 14,602 57,581 9,436 35,132 6,128 8,449 132,047 353,474 3,475 16,581 56,868 10,418 39,057 6,094 9,526 151,991 435,257 4,214 16,332 58,552 12,328 48504 7,718 12,005 195,862 560,569 5,276 22,042 63,545 1Each mine, calcining plant, or combination mine and plant is counted as 1 establishment. ' Excludes byproduct gypsum. DOMESTIC PRODUCTION Thirty-six companies mined crude gypsum at 65 mines in 21 States. Of these mines, 12 were underground and 53 were open pit. Output increased 18% to 12,328,000 tons, 13% above the 1959 record. Leading States were Michigan, Texas, California, Iowa, and Oklahoma. These five States, with 30 mines, accounted for 59% of the total crude gypsum. Leading companies were United States Gypsum Co. (13 mines), National Gypsum Co. (7 mines), Georgia-Pacific Corp. (7 mines), The Flintkote Co. (2 mines), and The Celotex Co. (3 mines). These five companies, operating 32 mines, produced 75% of the total crude gypsum. Leading mines were U.S. Gypsum's Plaster City, calif., mine, and Alabaster, Mick, mine; National's Tawas City, Mich., mine, and Shoals, Ind., underground mine; and U.S. Gypsum's Southard, Okla. mine. Fourteen companies calcined gypsum at 1 Physical scientist, Division of Nonmetallic Minerals. ' Johnson, Kenneth S. Gypsum and Salt Resources in Oklahoma. Industrial Minerals, v. 62, November 1972, pp. 33—39.
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