Study On The Strengthening Effect Of Copper-molybdenum Mixed Concentrate Treated By Ultrasonic Technology On Copper-molybdenum Separation Flotation Process

Copper and molybdenum resources are an important strategic resource in my country.The demand for two types of mineral resources is increasing day by day,so their utilization has also received increasing attention.Since the copper-molybdenum deposits in my country are mostly porphyry-type mixed deposits,the separation of the two minerals has always been a problem in the comprehensive recovery process.This article takes molybdenite and chalcopyrite as the research objects,pre-treating the mixed concentrate through the traditional grinding process and ultrasonic process,and examines the effect of flotation separation under the two processes;at the same time,the contact angle test,Adsorption capacity test,dissolved oxygen content test,microscopic observation and other methods were used to investigate the changes in the surface properties of chalcopyrite and molybdenite under the two processes of grinding and ultrasonic treatment,and to explore the mechanism of improving the separation effect of flotation.The thesis research can provide a certain theoretical reference for the realization of high-efficiency separation of molybdenite and chalcopyrite.The main findings are as follows:The results of pure mineral flotation show that in the process of mixed flotation,the mixed agent of YC agent + butyl xanthate is used as the collector;in the process of flotation separation,YC agent is used as the collector.At the same time,if no inhibitor is used in the flotation separation process,the effective separation of chalcopyrite and molybdenite can not be achieved,and sodium sulfide is used as the inhibitor.By separately treating the slurry and the YC agent aqueous solution by ultrasound,the flotation recovery rate can be slightly improved,and the consumption of sodium sulfide and YC agent in the subsequent flotation separation process can also be reduced.The flotation separation results show that in the copper-molybdenum separation process,YC agent is used as the collector,sodium sulfide is the inhibitor,under alkaline conditions,after the regrind process,the separation of copper and molybdenum is difficult,and the regrind time is over.Short,unable to remove the collector adsorbed by chalcopyrite in the mixed flotation process,resulting in excessively high grade and recovery rate of Cu in the molybdenum concentrate after flotation separation;the grinding time is too long and the brittle molybdenite Over-grinding leads to excessively high grade and recovery rate of Mo in copper concentrate after flotation separation.The separation effect of copper and molybdenum after ultrasonic treatment is better.The results of the adsorption capacity show that the chalcopyrite with butyl xanthate has a poor adsorption effect on sodium sulfide after a short period of grinding treatment.The contact angle test results showed that the surface of the grinding process for a longer period of time reduced the contact angle of the molybdenite added with YC agent.It can be seen that the regrind process has higher requirements for grinding control and cannot effectively increase the difference in floatability of the two minerals.Ultrasonic treatment can not only effectively reduce the chalcopyrite surface contact angle,but also slightly increase the molybdenite surface contact angle.At the same time,ultrasonic treatment can reduce the dissolved oxygen content of the slurry and the reagent solution,prevent sodium sulfide from being oxidized in the subsequent flotation separation process;at the same time,improve the dispersion of the YC reagent solution and increase the utilization rate of the collector during the flotation process;Reduce the amount of collectors and inhibitors.