Research Progress on Pretreatment and Enhanced Separation of Copper-Molybdenum Bulk Concentrate
Copper and molybdenum are important non-ferrous metal resources which are highly valued by the state.They usually exist in porphyry copper-molybdenum deposits in the form of chalcopyrite and molybdenite.At present,copper-molybdenum bulk flotation-copper-molybdenum separation process is commonly used in industry to treat copper-molybdenum ore,however,a large number of chemicals remaining in the bulk flotation stage will lead to the subsequent separation process becomes difficult,and it is necessary to improve the separation effect by dedrug pretreatment and other processes.The pretreatment and intensive separation methods of copper-molybdenum bulk concentrate proposed by researchers at home and abroad are reviewed in detail,including mechanical regrinding,concentration and adsorption,which aim at removing the residual flotation agents in the pulp to the maximum extent,reducing the floatability of chalcopyrite and improving the recovery of molybdenite.The surface of chalcoprite is covered by hydrophilic oxidation products such as CuO,Cu(OH)2,FeOOH,Fe2(SO4)3 through oxidation treatment of copper and molybdenum bulk concentrate,thus inhibiting the oxidizing pretreatment processes,such as oxidizing reagent oxidation,plasma oxidation,electrochemical oxidation and temperature oxidation,which increase the surface floatability difference of copper and molybdenum ore.It also uses the magnetic difference of chalcopyrite and molybdenite to separate the pulsating high gradient magnetic separation process,flotation column flotation process aiming at the characteristics of highly dispersed molybdenite and fine particle dyeing,ultrasonic treatment process to promote the action of chemical reagents on the surface of minerals,seawater flotation process to enhance the stability of foam and potential control flotation behavior of copper and molybdenum ore by regulating the pulp potential selection process.The research progress was introduced and the main problems were analyzed,and the future research direction of copper-molybdenum flotation separation was prospected,in order to provide a reference for the research of copper-molybdenum separation technology.
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