Effects of DLZ Collector on Chalcopyrite and Pyrite Flotation

The interaction mechanism of DLZ collector in the flotation process for chalcopyrite and pyrite were investigated through flotation experiments,adsorption capacity measurements and FTIR.The results show that the collecting ability of DLZ to chalcopyrite is much stronger than that to pyrite at pH=2.7-12.05,the maximum recovery of chalcopyrite is 95.7%.The recovery of pyrite is less than 10% at pH=6.9-12.05.There is no significant change for the recovery of chalcopyrite at pH=7-11 using CaO or NaOH as pH accommodating,and the floatability of pyrite is depressed and the recovery of pyrite is less than 5% while using NaOH as pH accommodating.The adsorption capacity of DLZ onto chalcopyrite surface is more than onto pyrite surface,specially under the strong alkaline conditions.The adsorption capacity of DLZ onto two minerals surface is proportional to the dosage of DLZ.There is a characteristic absorption peak of DLZ after being absorbed onto chalcopyrite surface.The infrared spectrum of DLZ and Cu2+ have no obvious change after being absorbed onto pyrite surface.The adsorption of DLZ onto chalcopyrite surface is chemical absorption and that onto the pyrite surface is physical adsorption.