Characterisation of sphalerite and pyrite flotation samples by XPS and ToF-SIMS

The surface analytical techniques of X-ray Photoelectron Spectroscopy (XPS) and Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS) have provided information on the type and concentration of species on the surface of sphalerite and pyrite particles in flotation concentrate and tail samples, but also on their distribution on each particle and across particles of different sizes. From this surface analytical study, a more accurate interpretation of the flotation results of sphalerite and pyrite minerals in a mixed mineral system could be made as a function of the concentrations of copper sulphate activator and xanthate collector, and particle size. In particular, it was found that sphalerite particles reporting to the concentrate are larger in size and contain less iron hydroxide on their surface than particles reporting to the tail. As for the pyrite particles, their lower recovery than the sphalerite particles is the result of a larger proportion of iron hydroxide on their surface inhibiting copper and collector adsorption.

[1]  W. J. Trahar.  The selective flotation of galena from sphalerite with special reference to the effects of particle size , 1976 .

[2]  Roger St. C. Smart,et al.  Statistical comparison of hydrophobic and hydrophilic species on galena and pyrite particles in flotation concentrates and tails from TOF-SIMS evidence , 2002 .

[3]  D. R. Nagaraj,et al.  SIMS ANALYSIS OF FLOTATION COLLECTOR ADSORPTION AND METAL ION ACTIVATION ON MINERALS : RECENT STUDIES , 1997 .

[4]  J. Finch,et al.  Pyrite flotation in the presence of metal ions and sphalerite , 1997 .

[5]  John Ralston,et al.  Activation of zinc sulphide with CuII, CdII and PbII: II. Activation in neutral and weakly alkaline media , 1980 .

[6]  Andrea R. Gerson,et al.  XPS of sulphide mineral surfaces: metal‐deficient, polysulphides, defects and elemental sulphur , 1999 .

[7]  John Ralston,et al.  Effect of collectors, conditioning pH and gases in the separation of sphalerite from pyrite☆ , 1998 .

[8]  D. R. Nagaraj,et al.  SIMS and XPS study of the adsorption of sulfide collectors on pyroxene: a case for inadvert metal in activation , 1996 .

[9]  A. R. Pratt,et al.  X-ray photoelectron and Auger electron spectroscopic studies of pyrrhotite and mechanism of air oxidation , 1994 .

[10]  K. Jung,et al.  Effect of Complexing Ligands on the Adsorption of Cu(II) onto the Silica Gel Surface: II. Adsorption of Cu(II)-Ligand Complexes , 1995 .

[11]  W. Skinner,et al.  Statistical comparison of surface species in flotation concentrates and tails from TOF-SIMS evidence , 2000 .

[12]  James A. Finch,et al.  The role of copper ions in sphalerite-pyrite flotation selectivity , 2001 .

[13]  N. P. Finkelstein.  The activation of sulphide minerals for flotation: a review , 1997 .

[14]  G. Contini,et al.  Surface spectroscopic techniques applied to the study of mineral processing , 1993 .

[15]  A. Gerson,et al.  An investigation of the Cu (II) adsorption mechanism on pyrite by ARXPS and SIMS , 2000 .

[16]  John Ralston,et al.  The influence of particle size and contact angle in mineral flotation , 1988 .

[17]  Eric Forssberg,et al.  The Aqueous and Surface Chemistry of Activation in the Flotation of Sulphide Minerals—A Review. Part II: A Surface Precipitation Model , 1989 .

[18]  D. Fornasiero,et al.  Kinetics of Adsorption of Ethyl Xanthate on Pyrrhotite: In Situ UV and Infrared Spectroscopic Studies , 1995 .

[19]  Eric Forssberg,et al.  The Aqueous and Surface Chemistry of Activation in the Flotation of Sulphide Minerals—A Review. Part I: An Electrochemical Model , 1989 .

[20]  R. Szargan,et al.  XPS studies of xanthate adsorption on pyrite , 1992 .

[21]  John Ralston,et al.  Effect of oxidation on the collectorless flotation of chalcopyrite , 1997 .

[22]  R. Smart,et al.  A study of the removal of oxidation products from sulfide mineral surfaces , 1995 .

[23]  A. Gerson,et al.  Cu(II) adsorption mechanism on pyrite: an XAFS and XPS study , 2000 .

[24]  D. Nagaraj,et al.  SIMS study of adsorption of collectors on pyrite , 2001 .

[25]  W. Skinner,et al.  SIMS studies of oxidation mechanisms and polysulfide formation in reacted sulfide surfaces , 2000 .