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The effect of metal cations on flotation behavior of barite(Vol. 40, No.5, 2020) TEXT SIZE: A A A

DAI Hui-xin1,2, TANG Dong-dong1,2, DU Wu-xing3,4, WANG Fei-wang1,2

(1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China;
2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
3. Zhengzhou Non-ferrous Metals Research Institute Co. Ltd of CHALCO, Zhengzhou 450041, China;
4. National Aluminum Smelting Engineering Technology Research Center, Zhengzhou 450041, China)

Abstract: The effect and its principle of action of metal cations (Fe3+,Zn2+,Fe2+and Pb2+) on flotation behavior of barite have been studied in this paper by using means of the mineral separates flotation, stoichiometric calculation of solutions, Zeta potential test, and infrared spectroscopy. Flotation experimental results show that four metal cations of Fe3+, Zn2+, Fe2+ and Pb2+ can activate the flotability of barite at pH values ranging from 4 to 11.2 in the SDS flotation system. Especially, the Pb2 + has the best activation effect on the flotability of barite, followed by the Fe2 +. The Pb2+ activation mechanism study shows that the Pb2 +, mainly occurred in forms of Pb2+ and Pb(OH)+, was combined and dehydrated with the OH-- adsorbed on surface of the barite, and then the combined Pb2 +(Pb2+, Pb(OH)+) and OH-, which was adsorbed on surface of the barite, has promoted the adsorption of dodecyl sulfonate anions on the surface of barite, and thereby has enhanced the floatability of barite.

Keywords: Sodium dodecyl sulfonate (SDS); barite; metal cation; mechanism analysis

ACTA MINERALOGICA SINICA Vol. 40, No.5, 2020, page 595-600 

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