The Flotation of Chalcocite, Bornite, Chalcopyrite, and Pyrite in an Electrochemical-flotation Cell.
Richardson PE; Walker GW
Ch in XVth Int Min Proc Cong Gedim Saint-etienne France 1985 :198-210
The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically. The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical potential, with the recovery changing from 0 to 100 pct in potential intervals of - 0.2 V. The flotation edge occurs at more reducing potentials as the copper-to-iron ratio of the minerals increases. Linear sweep voltammetry and ultraviolet spectrophotometry were used to study the reaction mechanisms between the minerals and ethylxanthate. The hydrophobic entities appear to be the formation of metal-xanthate on chalcocite and bornite, dixanthogen on pyrite, and both species on chalcopyrite.
Ch. in XVth Int. Min. Proc. Cong, Gedim, Saint-etienne, France, 1985, PP. 198-210
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