Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Schottman, Frederick J.; Kuck, Peter H.
Silicon, pp. 793-799 ff. PDF (624.5 KB)
793Silicon By Frederick J. Schottman1 and Peter H. Kuck' Consumption of silicon alloys and metal increased 7%, based on silicon content, between 1977 and 1978. However, domestic shipments increased only slightly in 1978 because of higher imports. Increased de mand in foreign markets during 1979 resuited in lower imports and higher domestic production. Domestic prices rose as much as one-third between 1977 and 1980. DOMESTIC PRODUCTION Shipments of silicon metal and alloys by domestic producers increased only slightly in 1978 and 1979. Reflecting changes in demand, the increase was concentrated in the 56% to 95% grades of ferrosilicon and in silicon metal. In March 1978 Cabot Corp. bought a 64% interest in Kawecki Berylco Industries, Inc. (KBI) by purchasing stock held by Union Oil Co. of California and Pacific Holding Co. Later in the year Cabot acquired the remaining KBI shares held by other owners and merged with KB!. The National Metallurgical Division of KBI produces silicon metal at Springfield, Oreg., while Cabot produces fumed silica from silicon metal at Tuscola, Ill. In May 1978 BOC International, Ltd., acquired control of Airco Inc. by means of a stock tender offer. At that time Airco was producing ferrosilicon and other ferroalloys at Calvert City, Ky., and Niagara Falls, N.Y. The new Airco Division then sold its ferrosilicon operations in July 1979. Airco's two ferrosilicon plants were purchased by SKW Alloys, Inc., a subsidiary of SKW Trostberg, a Federal Republic of Germany company with ferroalloy plants in Canada and the Federal Republic of Germany. In September 1979 South African Manganese Amcor, Ltd. (SAMANCOR) purchased the Roane Electric Furnace Co. plant at Rockwood, Tenn., from Engelhard Minerals & Chemicals Corp. The Rockwood plant has a capacity of 18,000 short tons per year of 50% ferrosilicon and is a significant producer of ferromanganese and siicomanganese.
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