| An efficient separation of copper and sulfur minerals in Yulong copper mine is always a difficult point.It is of great significance to improve the utilization ratio of copper resources by developing efficient and environmental friendly flotation reagents and making suitable process flow in the separation of copper sulfide minerals.Difficulty of separation in copper and sulfur,poor selective targets and high cost of chemicals which all limits the benefit of the largest non-ferrous metal associated ore in the world.Firstly the floatability of the study objects chalcocite,chalcopyrite and pyrite,the types of collector,and the effect of Cu2+ on the flotation of the three minerals are investigated in this paper,Secondly,The effect which pH and inhibitor type,concentration react in the flotation of in the presence of Cu2+ is investigated.Finally,conclude the best regulator-collector system to realize the separation of copper and sulfur minerals effectively.,the mechanism of flotation behavior of those three single minerals(Chalcocite,chalcopyrite and pyrite)is studied by means of X ray diffraction(XRD),contact angle measurement,UV spectroscopic study,infrared spectroscopy on the basis of flotation test.Three kinds of pure minerals shows different floatability in neutral environment,chalcocite is better than chalcopyrite and pyrite is the worst.The different type of collectors also lead to different flotation influence.BK404 shows that is the bes result as a collector.The selectivity of BK404 is good for chalcocite and chalcopyrite in a wide range of pH values than pyrite,and the worst effect appears in alkaline conditions.However,the floatability of pyrite is enhanced obviously and its flotation recovery rate is approach chalcopyrite's after the adding of Cu2+.The sodium humic acid and XKY-03 has inhibitory effect of on pyrite obviously in the presence of Cu2+,the inhibitory effect on pyrite could be strengthened while sodium humic acid and XKY-03 are used at the same time.Meanwhile,it will weaken the inhibitory effect of XKY-03 on chalcopyrite.The research shows that humic acid sodium and XKY-03 can weaken the activation of Cu2+ on pyrite,but not to the recovery of copper minerals.UV spectra shows that the adsorption capacity on the surface of BK404 is relatively large of the Chalcocite,chalcopyrite than pyrite.The Cu2+ can promote the adsorption of BK404 on the surface of pyrite,and improve the floatability.the adsorption of BK404 and the effect of Cu2+ react on mineral surface could be reduced after sodium humic acid and XKY-03 are added.FTIR analysis shows that BK404 is physically adsorbed on the surface of pyrite,but the adsorption typechange to physical and chemical after Cu2+ adding which could generated CuS on its surface make it hydrophobic.According to the theoretical analysis results,the applycation of the optimized reagent and technology system in Yulong copper mine of Tibe is successful,and obtained a good index.under ore containing 2.31% copper,we get the copper cocentrate of grade is 18.32% and recovery is71.02% in the period of industral debugging,compared to the prior industrial test,the grade increased 1.20 percents,and the recovery rate was increased 5.30 percents. |
PDF Full Text Request