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Abstract

Impact of oxidation on the flotation of a complex Ni–Cu sulphide has been investigated using two approaches. In the first approach, the samples to be floated were allowed to oxidise before grinding while in the second approach they were allowed to oxidise after grinding. Their flotation characteristics were examined with reference to behaviour of a fresh ore sample. Oxidation before or after grinding has produced an inferior nickel grade–recovery performance. However, the latter case has induced a much greater adverse effect associated with several times more nickel losses and poorer selectivity between pentlandite and pyrrhotite. This was due to over oxidation of part of pentlandite and more importantly enhanced flotation of pyrrhotite which is related to metal ion activation and elemental sulphur formation. Oxidation characteristics of samples in each category are discussed in terms of pH, redox and conductivity behaviour that are utilised for correlations with flotation performance.

Keywords

OXIDATION FLOTATION PENTLANDITE PYRRHOTITE SELECTIVITY NICKEL LOSSES

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References

Kocabag

and Smith

M. R.

: in ‘Complex sulphides, processing of ores, concentrates and by-products’, (ed. Zundel

A. D.

et al), 55–81; 1985, Warredale, PA, The Metallurgical Society, AIME.

Iwasaki

: in ‘Extractive metallurgy of nickel and cobalt tyroler’, (eds. Tyroler

G. P.

and Landolt

C. A.

), 271–292; 1988, Warredale, PA, The Metallurgical Society, AIME.

Kerr

: Private communication, 2005.

Buckley

A. N.

and Woods

: Appi Surf Sci, 1985, 22/23, 280–287.

Buckley

A. N.

and Woods

: Surf Interf Sci., 1991, 17, 675–680.

Legrand

D. L.

, Bancroft

G. M.

and Nesbitt

H. W.

: Int. J. Miner. Process., 1997, 51, 217–228.

Legrand

D. L.

, Nesbitt

H. W.

and Bancroft

G. M.

: Am. Miner., 2005, 90, 1042–1054.

Legrand

D. L.

, Nesbitt

H. W.

and Bancroft

G. M.

: Am. Miner., 2005, 90, 1055–1061.

Malysiak

, Shackleton

N. J.

and O'Connor

C. T.

: Int. J. Miner. Process., 2004, 74, 251–262.

10.

Miller

J. D.

, Li

, Davidtz

J. C.

and Vos

: Miner. Eng., 2005, 18, 855–865.

11.

Nanthakumar

, Katsabaris

P. D.

and Pelley

C. W.

: Proc. 38th Ann. CMP Meet., Ottawa, Canada, January 2006, CMP, 627–641.

12.

Nanthakumar

, Kelebek

and Katsabanis

P. D.

: Proc. 23rd Int. Cong. on ‘Mineral Processing’, Istanbul, Turkey, 2006, (ed. Onal

et al), Vol. 1, 772–777; 2006, Istanbul, Promed/YMGV.

13.

Kelebek

, Nanthakumar

and Katsabanis

P. D.

: in ‘Interfacial phenomena in fine particle technology’, (eds. Xu

and Liu

), 361–374; 2006, Montreal, MetSoc, CIM.

14.

Kelebek

and Tukel

: Int. J. Miner. Process., 1999, 57, 135–152.

15.

Kelebek

and Smith

G. W.

: Miner. Metall. Process., 1989, 6, 123–129.

16.

Nanthakumar

: ‘A comparative study of flotation of stockpile fines from mining of a Ni-Cu sulphide ore’, PhD thesis, Department of Mining Engineering, Queen's University, October 2006.

17.

Senior

G. D.

and Trahar

W. J.

: Int. J. Miner. Process., 1991, 33, 321–341.

18.

Heyes

G. W.

and Trahar

W. J.

: Int. J. Miner. Process., 1977, 4, 317–344.

19.

Richardson

P. E.

and Walker

G. W.

: Proc. 15th Int. Cong. on ‘Mineral processing’, Cannes, France, Vol. 2, 198–210; 1985, St-Etienne, GEDIM.

20.

Chander

: Int. J. Miner. Process., 1991, 33, 121–134.

21.

Martin

C. J.

: ‘Analysis by TOF-LIMS of the surface of sulphide minerals from samples taken from the StrathconaAMTELReport, 1994.

22.

Kelebek

, Wells and Heinrich

P. F.

: Proc. 6th Int. Symp. on ‘Mineral processing’, (ed. Kemal

et al); 1996, Rotterdam, A. A. Balkema.

23.

Guy

P. J.

and Trahar

W. J.

: in ‘Flotation of sulphide minerals’, (ed. Forssberg

K. S. E.

), 91–110; 1985, Stockholm, Elsevier.

24.

Kelebek

and Nanthakumar

: Int. J. Miner. Process., to be published, DOT 10.1016/minpro2007.03.005.

25.

Chander

and Briceno

: in ‘Precious and rare metals technologies’, (eds. Torma

A. E.

and Gundiler

I. H.

), 137–148; 1989, Amsterdam, Elsevier.

26.

Latimer

W. M.

: in ‘Oxidation potentials’, (ed. Cliffs

), 392; 1952, Princeton, NJ, Princeton Hall.

27.

Khan

and Kelebek

: Trans. Inst. Min. Metall C, 2002, 110C, 115–122.

28.

Trahar

W. J.

: Int. J. Miner. Process., 1981, 8, 289–327.

Impact of oxidation on flotation of Ni–Cu sulphide ore with respect to grinding

Abstract

Keywords

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