FCX_Freeport-McMoRan Inc. - Worldwide Operations, Bagdad Mine .First mill began operation in 1928 to process ore from the underground mine. Transition to open-pit mining began in 1945. A $240 million expansion in 1973.mining oprations process,Unrivalled Assets - Mines & Projects - Canada & US - Operations .The processing plant's operations consist of grinding, gravity concentrating, . of Cochenour/Bruce Channel ore to the Campbell mine for processing at the.
mining oprations process