Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Ampian, Sarkis G.
Clays, pp. 301-327 ff. PDF (2.9 MB)
1971 1972 State Short tons Value Short tons Value Arizona W W 25,410 $284,660 California Colorado Idaho 33,932 1,548 W $1,047,583 7,742 W 39,787 929 40 923,027 6,043 120 Mississippi Missouri Montana Oregon Texas Utah 280,635 42,503 228,624 845 W 4,051 3,396,447 W 1,663,732 10,140 W 80,652 277,596 W 233,390 1,192 88,220 4,014 3,387,514 W 1,489,361 14,309 1,127,937 43,803 Wyoming Other States' 1,751,858 321,763 17,267,091 4,468,428 1,811,246 285,174 18,359,756 3,693,987 Total 2,665,759 27,891,815 2,766,998 29,330,517 308 MINERALS YEARBOOK, 1972 W Withheld to avoid disclosing individual company confidential data; included with "Other States."' Includes Alabama, Nevada, Oklahoma, South Dakota, and data indicated by symbol W. in 1972. Fire clay exports declined 23% in tonnage and 19% in value. The price of exported fire clay increased by $1.42 to $23.43 per ton. Fire clay was exported to 41 countries, with Canada and Mexico receiving 40% and 38%, respectively. The other 39 countries received the remaining 22%. No imports of fire clay were reported during 1972. There are no price quotations in domestic journals for fire clay, but the per-ton value reported by producers ranged from $2 to about $9. The reported average unit value for fire clay produced in the United States increased 31% from $6.24 per ton in 1971 to $8.15 in 1972. BENTONITE Bentonite production in 1972 increased 4% in tonnage and 5% in value over 1971. A general increase in domestic consumption, particularly in drilling mud, animal feed, and oil filtering uses, offset decreased exports and a decline in foundry sand applications. Bentonite was produced in 15 States. Increased bentonite production was reported for all States except Arizona, Colorado, Idaho, Mississippi, Oklahoma, South Dakota, and Utah. Generally, the high-swelling or sodium bentonites are produced chiefly in Wyoming, Montana, and South Dakota. The calcium or low-swelling bentonites are produced in the other States. Dust collection and -control equipment was installed by Federal Bentonite Co. and Kaycee Bentonite Co. in their Wyoming plants. Chemical Marketing Reporter, December 25, 1972, quoted bentonite prices as follows: Domestic, 200 mesh, bags, carload lots, f.o.b. mines, $l4.00—$l4.40 per ton; and imported Italian, white, high-gel, bags, 5-ton lots, ex-warehouse, $116.60 per ton. The average unit value reported by producers of domestic bentonite sold or used in 1972 was $10.60, a slight increase from the $10.46 average of the previous year. Per-ton values reported in the various producing States ranged from $3 to $23, but as in 1971, the average value reported by the larger producers was near the Wyoming average figure of $10.14. Bentoni-te imports in 1972, including chemically activated and special-purpose Italian material, totaled 2,853 short tons valued at $229,000 compared with 2,393 tons valued at $194,000 in 1971. The 2,853 tons of chemically activated bentonite was imported from six countries, with Canada supplying 49%; Mexico, 29%; West Germany, 11%; Japan, 10%; and Ireland and the United Kingdom the remaining 1%. Imports of Italian bentonite in 1972 increased from 66 short tons in 1971 to 127 tons. Bentonite exports in 1972 decreased from 663,000 short tons in 1971 valued at $16.2 million to 521.000 tons valued at $15.1 million. Although the tonnage exported decreased 21% from that shipped in 1971, the value decreased only 7%. The lesser decline in value was the result of the unit value of exported bentonite increasing $4.58 per ton, from $24.43 per ton in 1971 -to $29.01 per ton. This increase in per ton value was attributed to a large decline in Table 12.—Bentonite sold or used by producers in the United States, by State
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