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Production. Copper. This long row of large capacity ball mills is used for fine grinding of copper ore at one of the concentrators of the Utah Copper Company. Its mills at Magna and Arthur in Utah are treating vast quantities of the copper so vital for war purposes
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Credit lineProduction. Copper. This long row of large capacity ball mills is used for fine grinding of copper ore at one of the concentrators of the Utah Copper Company. Its mills at Magna and Arthur in Utah are. 1940-01-01. United States. Office Of War Information, Feininger, Andreas. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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Production. Copper. Ball mills, which grind copper ores to small sizes, at a large concentrator of the Phelps-Dodge Mining Company at Morenci, Arizona. This plant supplies great quantities of the copper so vital in our war effort
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Production. Copper. Fine copper ore travelling on a conveyor belt which discharges the ore into bins at one of the concentrators of the Utah Copper Company at Magna and Arthur in Utah. Vast quantities of the copper so vital to the war effort are treated here
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