Cites 2016

Pyrite flotation in the presence of galena. Study on galvanic interaction

Ebrahim Allahkarami 1  ,  
Amirkabir university of technology
Amirkabir University of Technology
Physicochem. Probl. Miner. Process. 2017;53(2):846–858
Publish date: 2017-03-25
In this investigation, galvanic interaction between galena and pyrite in flotation and its effect on floatability of pyrite were studied. Rest and mixed potential studies in the presence and absence of a collector indicated that pyrite was nobler than galena under all investigated conditions. Therefore, pyrite served as a cathode in galvanic interactions with galena. Floatability of pyrite was performed alone and as a mixture with galena in the ratios of pyrite to galena equal to 1:4, 1:1 and 4:1. The experiments were conducted with air and nitrogen. In any galvanic contact between pyrite and galena, anodic oxidation occurred on the galena surface, and hydrolysed lead species adsorbed on the pyrite surface. The investigation of the various reactions occurring on the sample surface was investigated by ethylene diamine-tetra acetic acid disodium salt (EDTA) extraction and X-ray photoelectron spectroscopy (XPS) measurements. In the presence of nitrogen, floatability of pyrite increased. The recovery of pyrite in the presence of air was 22%, while in the mixture with galena (ratio 1:4) the recovery increased to 43%. The results indicated that the presence of galena improved floatability of pyrite.
Ebrahim Allahkarami   
Amirkabir university of technology, Tehran, Iran, 6861756181 tehran, Iran
1. AHMED S.M., 1978, Electrochemical studies of sulphides, II. Measurement of the galvanic currents in galena and the general mechanism of oxygen reduction and xanthate adsorption on sulphides in relation to flotation. Int. J. Miner. Process., 5, 175-182.
2. BOCKRIS J.O.M., REDDY A.K.N., 1970, Modem Electrochemistry, 2. Plenum, New York, N.Y., p.p. 1274.
3. BOULTON A., FORNASIERO D., RALSTON J., 2003, Characterisation of sphalerite and pyrite flotation samples by XPS and TOF-SIMS. Int. J. Miner. Process., 70, 205–219.
4. BUCKLEY A.N., WOODS R., 1984, An X-ray photoelectron spectroscopic study of the oxidation of galena. Appl. Surf. Sci., 17, 401– 414.
5. EKMEKÇI Z., DEMIREL H., 1997, Effects of galvanic interaction on collectorless flotation behavior of chalcopyrite and pyrite, Int. J. Min. Proc., 52(1): 31-48.
6. FINKELSTEIN N. P., 1997, The activation of sulphide minerals for flotation: A review, Int. J. Min. Proc., 52(2-3), 81-120.
7. FORNASIERO D., Li F., RALSTON J., SMART R.St.C., 1994, Oxidation of Galena Surfaces: I. X-Ray Photoelectron Spectroscopic and Dissolution Kinetics Studies, J Colloid Interface Sci., 164, 333-344.
8. FUERSTENAU D.W, FUERSTENAU M.C., 1982, The flotation of oxide and silicate minerals. In: King, R.P. (Ed.), Principles of flotation, S.A Inst. Min and Metall. Johannesburg.
9. HOLMES P.R., CRUNDWELL F.K., 1995, Kinetic aspects of galvanic interactions between minerals during dissolution, Hydrometallurgy, 39, 353-375.
10. KYDROS K.A., MATIS K.A., SPATHIS P.K., 1995, The use of nitrogen in flotation. In: Matis, K.A. (Ed.), Flotation Science and Engineering, Marcel Dekker, New York, pp. 473–491.
11. MOSLEMI H., SHAMSI P., HABASHI F., 2011, Pyrite and pyrrhotite open circuit potentials study: Effects on flotation, Miner. Eng., 24, 1038–1045.
12. PECINA-TREVIÑO E.T., URIBE-SALAS A., NAVA-ALONSO F., 2003, Effect of dissolved oxygen and galvanic contact on the floatability of galena and pyrite with Aerophine 3418A. Miner. Eng., 16, 359–367.
13. PENG Y., GRANO S., FORNASIERO D. and RALSTON J., 2003, Control of grinding conditions in the flotation of galena and its separation from pyrite, Int. J. Miner. Process., 70 (1–4), 67– 82.
14. PEREZ N., 2004, Electrochemistry and Corrosion Science, Springer US, Kluwer Academic Publishers, p.p. 155-166.
15. QIN W., WANG X., MA L., JIAO F, LIU R., GAO K., 2015a, Effects of galvanic interaction between galena and pyrite on their flotation in the presence of butyl xanthate, Trans. Nonferrous Met. Soc. China, 25, 3111−3118.
16. QIN W., WANG X., MA L., JIAO F, LIU R., Yang C., GAO K., 2015b, Electrochemical characteristics and collectorless flotation behavior of galena: With and without the presence of pyrite, Miner. Eng., 74, 99–104.
17. RAO S.R., FINCH J.A., 1988, Galvanic interaction studies on sulphide minerals, Can. Metall. Q., 27 (4), 253.
18. SENIOR G.D., TRAHAR W.J., 1991, The influence of metal hydroxides and collector on the flotation of chalcopyrite, Int. J. Miner. Process., 33, 321–341.
19. SMART R.St.C., 1991, Surface Layers in Base Metal Sulphide Flotation, Miner. Eng., 4, 891-909.
20. SUBRAHMANYAM T.V., FORSSBERG K.S.E., 1993, Mineral solution-interface chemistry in minerals engineering, Miner. Eng., 6(5), 439-454.
21. XU M., FINCH J. A., RAO S. R., LIN D., 1995, Reverse flotation of pyrite from a zinc-concentrate using nitrogen, Miner. Eng., 8(10), 1159-1173.
22. ZHANG Q., XU Z., BOZKURT V., FINCH J.A., 1997, Pyrite flotation in the presence of metal ions and sphalerite, Int. J. Miner. Process., 52, 187–201.