How to inhibit oxidation and activation of pyrite by copper-molybdenum mixed flotation

Since the oxide or pyrite is activated copper ions, and thus the selective separation of chalcopyrite pyrite is often difficult, especially for open-pit mining ore difficult. In the copper- molybdenum mixed flotation, in order to inhibit oxidized and activated pyrite, an appropriate amount of sodium sulfide is usually added to reduce the oxidized surface of the pyrite and desorb excess copper ions on the surface of the pyrite. Long-term slurry aeration can reduce the activity of pyrite during copper-molybdenum flotation, and can separate pyrite from gypsum . Most of the fine muds obtained from the separation of coarse sand and fine mud are oxidized pyrite and acoustic fine mud. Different pharmaceutical systems can be used for the separation of coarse sand and fine mud.

Separating excess pyrite from chalcopyrite and molybdenum ore, first concentrating the slurry containing pyrite and chalcopyrite (micro molybdenite), adding lime to the high-concentration pulp to keep the pH above 12 Stir for 1.5 to 2.0 hours to obtain good separation between pyrite and chalcopyrite. If necessary, it is also possible to supplement inhibitors that strongly inhibit pyrite, such as cyanide.