丁黄药体系中方铅矿与黄铁矿的伽伐尼作用对 其浮选行为的影响.pdfVIP

Trans. Nonferrous Met. Soc. China 25(2015) 3111?3118 Effects of galvanic interaction between galena and pyrite on their flotation in the presence of butyl xanthate Wen-qing QIN, Xing-jie WANG, Li-yuan MA, Fen JIAO, Rui-zeng LIU, Ke GAO School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China Received 5 September 2014; accepted 10 June 2015 Abstract: The effects of galvanic interaction between galena and pyrite on their flotation and electrochemical characters were studied by electrochemical, adsorption, flotation and FTIR techniques, respectively. Electrochemical tests indicate that galena is electrochemically more active than pyrite and serves as an anode in galvanic combination with pyrite. The galvanic current density from a mixture of galena and pyrite is 4 times as high as the self corrosion current density of galena, which indicates that the corrosion rate of galena is accelerated. Adsorption tests show that the adsorption of butyl xanthate on galena surface is enhanced, and affected by a combination of pyrite?galena mixtures and conditioning time. Compared with individual mineral particles, galvanic interaction reduces the floatability difference between galena and pyrite. The flotation recovery of galena decreases while that of pyrite increases when two minerals are mixed together due to the influence of galvanic interactio