Study On The Performance Of Ionic Nano-Collectors And Its Mechanism Of Reaction With Micro Fine Chalcopyrite

With the rapid development of modern economy,copper resources are inevitably rapidly consumed,causing the copper ore to become increasingly lean,fine and miscellaneous.Therefore,the low-grade,complex and difficult to deal with copper resources is the main target of current research and development.The current well-known flotation processes and pharmaceutical systems have limited recycling of micro-fine copper minerals.To achieve efficient recovery of fine-grained copper resources,the development of new and efficient flotation reagents and flotation processes is currently a fine-grained grade.Copper flotation must break through the problem.In this paper,for the problem that the fine-grained chalcopyrite is difficult to recover effectively,according to the flotation properties of chalcopyrite,two kinds of nano-collectors(MNP and VNP)of anion and cation are synthesized.The structure and properties of the synthesized nano-collectors were characterized by nuclear magnetic resonance spectroscopy and infrared spectroscopy,and then applied to flotation experiments to study the effect of anionic and cationic nano-collectors on fine-grained brass under different conditions.The flotation behavior of ore and sphalerite was compared with the flotation effect of butyl xanthate.Finally,the mechanism of mineral interaction was explored through infrared spectroscopy,potentiodynamic potential test and surface wettability test.The anionic emulsifier SDS was selected to synthesize a negatively charged emulsion MNP,and a cationic emulsifier CTAB was selected to synthesize a positively charged emulsion VNP.Through the characterization,the size distribution of MNP and VNP was between 50 nm and 100 nm,and the molecular weight was More than 10,000,belong to high polymer.The pure mineral flotation test showed that MNP had the best flotation effect on the fine-grained chalcopyrite among the three agents: MNP,VNP,and butyl xanthate.The recovery rate was 95% in the pulp pH range of 6-8.Above,copper and zinc separation can be achieved to some extent.The effect of VNP and butyl xanthate on chalcopyrite flotation is not much different,but the selectivity of VNP is better than that of butyl xanthate,and butyl xanthate is better for fine-grained chalcopyrite and sphalerite Capacity,but not strong selectivity,can not achieve a good separation between the two.From infrared spectrum and potentiodynamic test,it can be seen that both MNP and VNP can adsorb on chalcopyrite surface.MNP reduces the zero point of chalcopyrite surface from 5.08 to 4.36.VNP makes zero point of chalcopyrite surface.Increased from 5.08 to 6.98.By measuring the change of the contact angle before and after the action of minerals and agents,it can be seen that the MNP increases the contact angle of chalcopyrite from 60.43° to 101.34°,which greatly improves the hydrophobicity of the chalcopyrite surface,and the VNP also enhances the hydrophobicity of the mineral surface,but the effect is weaker than MNP,which is consistent with the flotation test results.