Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Morning, John L.
Chromium, pp. 289-299 ff. PDF (1.1 MB)
CHROMIUM 297 creased 18% compared with that of 1971; 77% was classified as refractory-grade and 23% metallurgical-grade. Exports of refractory-grade chromite totaled 314,229 tons. The United States received 47%, Japan 15%, and the United Kingdom 12%; the balance was shipped to nine other countries. Japan received all of the 75,919 tons of metallurgical-grade chromite exported. Rhodesia, Southern.—United Nations economic sanctions, which were applied in 1966, brought retaliation by the Rhodesian Government in the form of an embargo on mining news, primarily production data. Firm production data has been unavailable since 1965. Rio Tinto (Rhodesia) Ltd. (RTR) reportedly - requested government approval for building a chromium smelter complex at Eiffel Flats near Gatooma. Production could occur in 1975 depending on world demand and government approval. The company was also considering using the facilities as a custom smelter. In preparation, RTR acquired the total share capital of Rhodesian Mining Enterprises Ltd. and the claims and assets of Great Dyke Chrome Mines Ltd. Rhodesian Mining had two mines in operation, the Jester and Feoch mines, and the O'Meath mine on standby. Great Dyke Chrome mines held a large number of claims in the Darwendale area of the Great Dyke. RTR also had an option to purchase the entire share capital of Frances Mines Ltd. South Africa, Republic of.—Chromite production in the Republic of South Africa totaled 1,635,000 tons and was down 10% compared with 1971 figures. Of the total, 504,000 tons was classified as less than 44% Cr203 1,078,000 tons from 44 to 48% Cr203 and 53,000 tons as over 48% Cr203. Local sales of chromite accounted for 359,000 tons and exports 1,386,000 tons. Local sales and exports moved in opposite directions compared with 1972; local sales decreased 19% while exports increased 8%. Despite the downturn of chromite production in South Africa, the Transvaal Consolidated Land and Exploration Co., Ltd., a subsidiary of Barlow Rand Ltd., reported annual chromite sales increased for its reporting period ending September 30. According to the firm's annual report, the group owns a substantial portion of South Africa's chromite reserves and the combined production of its three mines makes it the largest single producer of chromite in South Africa. Initial work has been completed on increasing chromite production at the Grasvally Chrome mine owned by African Metal Corp. Ltd. (AMCOR) and operated by Cromore Ltd. Mining began in 1962 and for the past eight years production ran about 500 tons per month. The current expansion project when completed in early 1976 will bring production capacity to 275,000 tons annually, of which 220,000 will be available for export. South Africa's ferrochromium output received a major boost when the Associated Manganese Mines of South Africa and United States Steel Corp.'s new plant at Machadodorp came into production in December. Full production capacity of the plant will be about 4,409 short tons per month. AM-COR's new chromium ferroalloy furnace was near completion at yearend. The new furnace with a rat-ed capacity of 50,000 tons of charge chromium annually will bring AMCOR's total ferroalloy production capacity to 125,000 tons annually, of which 80% will be available for export. Sweden.—Airco Alloys AB, a wholly owned subsidiary of Airco Alloys and Carbide Div. of Airco Inc., brought onstrea.m a 75,000-kilovolt-ampere furnace, reportedly the largest in the world for ferroalloy production. Although being used for ferrosilicon production, the firm also plans on using the facility for production of ferrochromium. The new unit replaces four smaller units at the plant and is equipped with a sand filter dust control system for removing pollutants. Turkey.—Etibank was authorized to develop chromite deposits near Cakmak, Islahiye, Turkey. The agreement calls for extracting 500 tons of chromite per year. Etibank also signed similar agreements for development of chromite deposits at Kirkpinar and Kuzoluk. International Mining Corp., Chrome Resources S.A., and Foote Mineral Co. joined forces to construct a plant for concentration of chromium ore in Turkey. Shipments of chromium concentrate were expected to begin late in the year. Yugoslavia.—The geology of Yugoslavian chromite deposits was described.5 ° Grafenauer, S. Recent Results on Alpine-Type Chromite Depoaita. Mining Met. Quart., (Rudarakometalurski Zbornic, No. 1, 1971, pp. 1—10) translated from Slovenian, 1972, pp. 5—14.
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