Physical chemistry mechanisms of CDR system in sulphide mineral flotation教材.pdf

International Journal of Minerals, Metallurgy and Materials
Volume 19, Number 3, Mar 2012, Page 192
DOI: -012-0537-y

Physical chemistry mechanisms of CDR system in sulphide mineral flotation

To-hyon Pak1,2), Ti-chang Sun1), Jue Kou1), and Chol-Ryong Huang2)
1) School of Civil & Environment Engineering, University of Science and Technology Beijing, Beijing 10008, China
2) School of Mining Engineering, University of Mining and Metallurgy Chongjin, Chongjin, Democratic People’s Republic of Korea
(Received: 1 March 2011; revised: 3 May 2011; accepted: 9 May 2011)

Abstract: The flotation tests, zeta potential measurements, and Fourier transform infrared spectroscopy (FTIR) analysis on galena, sphalerite,
and pyrite were studied in a collecting-depressing-reactivating (CDR) system. In this system, sulphide minerals were first collected and acti-
vated by the collector, and then depressed strongly by Ca(OH)2 in a strong alkaline solution. Finally, they were reactivated by H2SO4. The
flotation tests of pure minerals showed that in the Ca(OH)2 depressing process sulphide minerals had similar flotation characteristics because
they had already been influenced by the collector. Hence, the flotability differences between them were reduced. However, in the H2SO4 re-
activating process considerable differences in the flotability between galena an