https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12293531Edit ImageSaveSaveEditCropCustom TextMorenci, Arizona. Ball mills in the concentrator plant of the Phelps Dodge mining corporation which grinds copper ore to small sizes. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1107 x 1200 px | 300 dpiLarge JPEG 3227 x 3500 px | 300 dpiBest Quality JPEG 4832 x 5240 px | 300 dpiTIFF 4832 x 5240 px | 300 dpi | 48.29 MBFree DownloadMorenci, Arizona. Ball mills in the concentrator plant of the Phelps Dodge mining corporation which grinds copper ore to small sizes. Sourced from the Library of Congress.More