Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Fulkerson, Frank B.
Vermiculite, pp. 1295-1298 PDF (351.5 KB)
-1295Vermiculite By Frank B. Fulkerson' Crude vermiculite production increased 12% in 1972. The vermiculite was shipped from Montana and South Carolina mines to processing plants in 31 States for exfoliation. Apparent consumption of exfoliated vermiculite increased 18%. The exfoliated material was used mainly as lightweight concrete aggregate, as loose fill insulation, and in horticulture. Output of crude vermiculite in the Republic of South Africa, the only other significant world producer, advanced 12%. - Table 1.—Salient vermiculite statistics 1968 1969 1970 1971 1972 United States: Sold and used by producers: Crude thousand short tons 290 310 285 301 337 Value thousand doflars Average value per ton - Exfoliated thousand short tons $5,684 $19.60 213 $6,805 $21.95 250 $6,501 $22.81 221 $7,198 $23.91 209 $8,092 $24.01 247 Value thousand dollars - Average value per ton World: Production, crude_ - - thousand short tons - $16,845 $79.08 421 $19,916 $79.66 466 $18,809 $85.11 431 $20,885 $99.93 459 $24,777 $100.31 512 DOMESTIC PRODUCTION Crude Vermiculite-—The quantity of crude vermiculite sold or -used by producers increased from 301,000 tons in 1971 to 337,000 tons in 1972. The principal produ-cer was the Construction Products Division, W. R. Grace & Co., which operated mines near Libby, Mont., and Enoree, S.C. The only other producer was Patterson Vermiculite Co., Lanford, S.C. W. R. Grace & Co., continued construction on a $7 million, 1,000-ton-per-day wet-processing plant near Libby. The new facility, scheduled to be completed in mid-1973, was being equipped -to process finer sized ores. Exfoliated Vermiculite—The tonnage of exfoliated vermiculite sold or used by producers in-creased -from 209,000 in 1971 to 247,000 in 1972. The -lightweight material was produced at 50 plants in 31 States. Leading producer was W. R. Grace & Co., which operated 26 plants in 22 States. Leading States were California, Florida, New Jersey, South Carolina, and Texas. About 42% of the exfoliated vermiculite was produced in the five States. CONSUMPTION AND USES Lightweight concrete aggregate, loose fill insulation, and horticulture were the principal markets for exfoliated vermiculite. The quantity used as -lightweight concrete aggregate increased from 74,400 tons in 1971 to 80,000 tons in 1972, and the quantity consumed as loose fill insulation ad- vanced from 71,200 tons to 74,000 tons. The tonnage consumed in horticulture increased from 28,000 to 40,000. By main categories, the end-use pattern was as follows: Aggregates (concrete, plas1 Industry economist, Division of Nonmetallic Minerals.
http://rightsstatements.org/vocab/NoC-US/1.0/| As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright