Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Baumgardner, Luke H.; Hough, Ruth A.
Bauxite and alumina, pp. 95-110 PDF (1.6 MB)
110 MINERALS YEARBOOK, 1978-79 TECHNOLOGY The Federal Bureau of Mines continued its research program on the recovery of alumina from clay, anorthosite, and other raw materials abundant in the United States. The most promising technologies for extracting alumina were being tested and developed in miniplants at the Bureau's Boulder City (Nev.) Engineering Laboratory. Additional research in support of this effort was being conducted at other Bureau research centers. The miniplant program was initiated to evaluate the various processes on a comparative basis and to obtain cost and engineering data for the design and possible operation of a large-scale demonstration plant. Five companies were participating with the Bureau in the miniplant project on a cooperative cost-sharing basis. In 1979 the major emphasis of the miniplant project was on the hydrochloric acid process for recovering alumina from clay. Test runs of several sections of this miniplant were completed. The second and third tasks of a threepart, $1.6 million contract awarded by the Bureau to Kaiser Engineers in 1976 were completed. The third task was for the design of a 25-ton-per-day alumina pilot plant based on the most promising process as determined from the second task of the contract. A contract, awarded by the Bureau to the Colorado School of Mines Research Institute for a study on the environmental factors involved in metallurgical processing utilizing domestic resources in the production of alumina was completed. ' Physical scientist, Section of Nonferrous Metals. 2Statistical assistant, Section of Nonferrous Metals. 3Mining Magazine. Bauxite Mining Developments in Hungary. V. 138, No. 1, January 1978, p. 11. 4Metal Bulletin Monthly. No. 111, March 1980, pp. 21-31. 5Strishkov, V. V. Mineral Industries of the U.S.S.R. Mining Ann. Review, 1979, pp. 569-571. 6The Economics of Aluminium, First Edition. Roskill Information Service Ltd., August 1979, p. 29.
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