Recovery of Copper from Crushed and Sized Porphyry Mine Waste.
McKinney-WA; Evans-LG; Simpson-WW
Trans Soc Min Eng AIME December 1973 SME Tech Note 1973 Dec; 254:295-296
Research demonstrated that significantly improved recoveries of copper, molybdenum, gold, and silver were obtained from copper- bearing open pit strip waste by crushing and sizing techniques followed by flotation of an enriched fine fraction and leaching of the remaining coarse material. More copper was recovered from chalcopyrite-bearing mine waste by flotation of fines than could be obtained by percolation leaching for 1 year. Copper recoveries were doubled by combining percolation leaching of the coarse fractions with flotation of the fines. The research also demonstrated that flotation of fines recovered substantial amounts of molybdenum and some gold and silver, all of which would be lost in conventional dump leaching.
Trans. Soc. Min. Eng., AIME, December 1973, SME Tech. Note, V. 254, PP. 295-296