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Bureau of Mines / Minerals yearbook metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Harris, Keith L.
Tin,   pp. 1209-1225 ff. PDF (1.7 MB)

Page 1210

 1,786 1,494 
 583 672 
 2,369 2,166 
 1,105 1,284 
 7.15 6.79 
 $28.78 $30.15 
 ' Tinplate clippings and old tin-coated containers have been combined to
avoid disclosing individual company confidential data. 
 2 Recovery from tinplate scrap treated only. In addition, detinners recovered
551 long tons (494 tons in 1971) 
of tin as metal and in compounds from tin-base scrap and residues in 1972.
represents a significant increase from 167.344 cents per pound in 1971. 
 The International Tin Council (ITC) at its regular quarterly meeting in
July redeterrnined floor and ceiling prices for tin in the light of changes
in exchange rates following the floating of the pound sterling. The market
price of tin for purposes of buffer stock operations was to be expressed
as the ex-works price on the Penang market. 
 Legislation and Government Programs. 
—No strategic stockpile tin was disposed of through commercial channels
during the 
year. However, 361 long tons of tin were released to AID for shipment to
Turkey. The stockpile objective remained at 232,000 long tons, and at the
end of the year, there was an excess of 18,664 long tons on hand. 
 Government financial assistance on a participatory basis was available through
the Office of Minerals Exploration (OME), U.S. Geological Survey, for tin
exploration up to 75% of the allowable costs. 
 The depletion allowance for tin remained at 22% for domestic deposits and
14% for foreign deposits. 
 Mine Production.—Domestic production of tin, in 1972 was less than
100 long tons. Most of the year's output came from Colorado as a byproduct
of molybdenum mining. Some tin concentrate was produced at dredging operations
and, as a byproduct of placer gold mining operations in Alaska. The Lost
River Mining Corp., set up by Canada's P.C.E. Explorations to conduct operations
at a fluorite-tin-tungsten property in the Lost River area of Alaska's Seward
Peninsula, continued its feasibility study on mining and milling facilities
for a 4,000-long-ton-per-day open pit mine projected to open by 1976. Reserves
at the prospect area represent at least a 20-year supply. A $3 million share
placement has been made to cover costs of the feasibility study. United States,
Japanese, and Canadian firms have shown interest in long-term purchases and
considerable financial assistance will be given by State and Federal agencies.
 Smelter Production—The only tin smelter in the United States is the
Texas City, Tex., facility of Gulf Chemical and Metallurgical Corp. In 1972,
it operated' on Bolivian tin concentrate which formed the base load together
with low-cost reclaimed domestic industrial residues to complete the feed.
The smelter performed these functions as a contract toll converter for COMIBOL,
and the resulting metal was then sold by COMIBOL to U.S. consumers. Thus,
to all intents and purposes, U.S. tin consumers were wholly dependent upon
foreign tin in 1972. 
 The United States is the world's leading producer of recycled, or secondary,
tin. The United Kingdom, the Federal Republic of Germany, Austria, and Australia
also produce secondary tin in significant quantities. 
 Of the tin recycled during 1972, 89% was an alloy constituenL of bronzes,
Table 2.—Secondary tin recovered from scrap processed at detinning
in the United States 
 1971 1972 
Tinplate scrap treated' long tons. 742,259 714,960 
Tin recovered in the form of— 
 Metal do. 
 Compounds (tin content) ~ 
    Total2 do.. 
Weight of tin compounds produced                                
Average quantity of tin recovered per long ton of tinplate scrap used pounds
Average delivered cost of tinpiate scrap per long ton.. 

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