Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Reed, Avery H.
Calcium and calcium compounds, pp. 235-236 PDF (184.7 KB)
235Calcium and Calcium Compounds By Avery H. Reed1 Calcium metal was manufactured by one company in Connecticut. Calcium-magnesium chloride was produced by two companies in California and three companies in Michigan. Synthetic calcium-magnesium chloride was manufactured by three companies, in New York, Ohio, and Washington. - DOMESTIC PRODUCTION Pfizer, Inc., produced calcium metal at Canaan, Conn., by the Pidgeon process, in which quicklime and aluminum powder are heated in vacuum retorts. At a temperature of 1170° C, calcium vaporizes and is collected at one end of the retort. Leslie Salt Co. and National Chloride Co. of America produced calcium-magnesium chloride from dry lake beds in San Bernardino County, Calif. Output declined 32%. The Dow Chemical Co., Michigan Chemical Corp., and Wilkinson Chemical Corp. recovered calcium-magnesium chloride from wells in Gratiot, Lapeer, Mason, and Midland Counties, Mich. Output decreased 3%. Total production of natural calciummagnesium chloride was 4% less than that of 1971 and was 9% below the 1969 record high. Allied Chemical Corp., Syracuse, N.Y., PPG Industries, Inc., Barberton, Ohio, and Reichold Chemicals, Inc., Tacoma, Wash., manufactured synthetic calcium-magnesium chloride as a byproduct of soda ash. Total output decreased 2% below the 1968 record. CONSUMPTION AND USES Calcium metal was used as a reducing agent to separate metals such as columbium, tantalum, thorium, titanium, uranium, vanadium and zirconium from their oxides; to form alloys with aluminum, lead, lithium, magnesium, and silicon; as a scavenger in the steel industry; and in the manufacture of calcium hydride. The principal use for calcium-magnesium chloride was to melt snow and ice from roads, streets, bridges, and pavements. It was also used to keep down dust on roads and driveways and as an accelerator for concrete. 1 Physical scientist, Division of Nonmetallic Minerals. Table 1.—Price quotations for caldum chloride (Per short ton) Grade Dec. 27, 1971 Dec. 24, 1972 Flake or pellet, 94—97% 1 Flake, 77—80% 1 Powdered, 77% minimum' Liquor, 40%' Granulated, U.S.P.' $ 55.00 44.00 52.50 16.50 780.00 $ 56.50 4450 52.50 17.00 78-0.00 ' Paper bags, carload lots, plant, freight equalized. ' Tank cars, freight equalized. ' 225-pound drums, freight equalized. Source: Oil, Paint and Drug Reporter, v. 198, No. 26, Dec. 28, 1971; Chemical Marketing Reporter, V. 202, No. 26, Dec. 25, 1972.
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