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

Haines, Stanley K.
Vermiculite,   pp. 989-992 PDF (375.2 KB)


Page 989

Vermiculite 
By Stanley K Hainesi 
 Domestic production of crude vermiculite Texas, and South Africa The principal
end reached 359 000 tons slightly below the uses were as loose-fill and block
insulation record of 365,000 tons in 1973 Output of in concrete aggregate
in premixes for exfoliated vermiculite increased to 321 000 acoustic fireproofing
and other applica tons 19% above the revised 1976 total The tions and for
agricultural purposes World average value per ton contmued to climb production
of crude vermiculite was 569,879 reaching $15742 Exfoliating plants proc
tons, a decrease of 1% from 1976 
eased ore from Montana, South Carolina, 
Table 1 —Salient vermiculite statistics 
(Thousandshort tons and thousand dollars) 
 1973 1974 1975 1976 
rEevised 
 1977 
 841 330 304 359 
 $10,120 $18,761 $14,032 $18,579 
 $29.68 $41.70 $46.16 $51.75 
 275 235 r27o 321 
 $30,916 $86,345 r$42,255 $50,103 
 $112.42 $154.66 r$16540 $157.42 
 44 45 41 45 
 42 33 40 40 
 ~ r529 T577 570 
  989 
UnitedStates 
Sold or used by producers: 
 Crude 365 
 Value $9,464 
 Averagevalueperton  $25.98 
 Exfoliated. _ 293 
 Value  $31186 
 Average value per ton  $106.44 
 ExportstoCanada  86 
 Imports from the Republic of South Africa  30 
 World Production crude  549 
DOMESTIC PRODUCTION 
 Crude Veriniculite.—.Output of vermiculite cOncentrate, commonly
called
crude, inOreased 18%, from 304,000 tons in 1976 to 859,000 tons. The principal
mining operations were W. R. Grade & Co.'s mnes and beñeflciating
plants in Libby, Mont. and Enoree, S.C. Crude vermiculite was also peoduded
by Patterson Vermiculite Co. in Lanford, S.C., and Volite, Inc., Llano, Tex.
 At yearend Virginia Vermiculite Co. had obtained commercial financing for
its mine, beneficiation plant, and exfoliation plant in Louisa County, VL
Mining was planned for late 1978. 
Exfoliated Vermiculite.—.Production of 
exfoliated vermiculite increased 18% in quantity and 19% in value in 1977.
The five leading producing States were Ohio, South Carolina, Texas, Florida,
and New Jersey. 
W. R. Grace & Co., Construction Products Div., the principal producer
of crude and 
exfOliated vermiculite, operated 30 plants in 24 States. Vermiculite was
produced by 22 companies with 52 plants in 29 States. 
Crude vermiculite from the Republic of South Africa was exfoliated at about
10 domestic plants. 


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