San Manuel ore Magma Copper Company 0.660 Cu was crushed, and 700 g of the crushed ore was mixed with 500 mls of water, 5 mg of potassium amyl xanthate as collector and sufficient lime to bring the mixture to a pH of 10.5. The mixture was ground for 7 minutes in a laboratory ball mill and the resulting pulp was transferred to a flotation cell.
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