Achieving efficient flotation separation of chalcopyrite and galena while maintaining environmental friendliness poses a challenge.This study utilized the environmentally friendly copolymer acrylic acid-2-acrylamide-2...Achieving efficient flotation separation of chalcopyrite and galena while maintaining environmental friendliness poses a challenge.This study utilized the environmentally friendly copolymer acrylic acid-2-acrylamide-2-methylpropanesulfonic acid(AA/AMPS)as a depressant to separate chalcopyrite and galena.Flotation tests revealed a significant reduction in galena recovery when AA/AMPS was employed,with minimal impact observed on chalcopyrite.In artificial mixed ore flotation,AA/AMPS was found to enhance the efficiency of copper and lead separation,surpassing K_(2)Cr_(2)O_(7).Furthermore,the effectiveness of AA/AMPS in facilitating copper-lead separation has been validated in practical ore flotation.The presence of AA/AMPS inhibited the adsorption of SBX onto galena,as confirmed by zeta potential and contact angle measurements.However,the adsorption on chalcopyrite remained unaffected.Through analyses using Atomic Force Microscope,X-ray photoelectron spectroscopy,and Density Functional Theory,a robust chemical interaction between the reactive groups in AA/AMPS and Pb sites on galena was uncovered,resulting in the formation of a hydrophilic polymer layer.This layer impedes SBX adsorption and reduces galena's floatability.In contrast,no significant chemical adsorption was observed between AA/AMPS and Cu and Fe sites on chalcopyrite,preserving its SBX affinity.Overall,AA/AMPS shows promise in replacing traditional depressants for Cu-Pb sulfide ore separation,enhancing environmental sustainability.展开更多
基金supported by the Cultivation plan of National Science and Technology Award reserve Project of Jiangxi Science and Technology Department(No.20192AEI91003)the Major science and technology projects of Qinghai Province(No.2018GX-A7)。
文摘Achieving efficient flotation separation of chalcopyrite and galena while maintaining environmental friendliness poses a challenge.This study utilized the environmentally friendly copolymer acrylic acid-2-acrylamide-2-methylpropanesulfonic acid(AA/AMPS)as a depressant to separate chalcopyrite and galena.Flotation tests revealed a significant reduction in galena recovery when AA/AMPS was employed,with minimal impact observed on chalcopyrite.In artificial mixed ore flotation,AA/AMPS was found to enhance the efficiency of copper and lead separation,surpassing K_(2)Cr_(2)O_(7).Furthermore,the effectiveness of AA/AMPS in facilitating copper-lead separation has been validated in practical ore flotation.The presence of AA/AMPS inhibited the adsorption of SBX onto galena,as confirmed by zeta potential and contact angle measurements.However,the adsorption on chalcopyrite remained unaffected.Through analyses using Atomic Force Microscope,X-ray photoelectron spectroscopy,and Density Functional Theory,a robust chemical interaction between the reactive groups in AA/AMPS and Pb sites on galena was uncovered,resulting in the formation of a hydrophilic polymer layer.This layer impedes SBX adsorption and reduces galena's floatability.In contrast,no significant chemical adsorption was observed between AA/AMPS and Cu and Fe sites on chalcopyrite,preserving its SBX affinity.Overall,AA/AMPS shows promise in replacing traditional depressants for Cu-Pb sulfide ore separation,enhancing environmental sustainability.
