3512 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
confirmed the deposition of metallic Ni and Co on the sur-
face of the FeS2, which allowed the FeS2 particles to be col-
lected in the magnetic fraction.
CONCLUSION
The results showed that the magnetic metal deposition of
Co and Ni occurred on the surface of FeS2 in the presence
of Al powder, making it possible to separate them using
magnetic separation. The highest magnetic fraction, almost
100%, was achieved with Ni cementation when using 6:4
mixing ratio of Al over FeS2 and 0.50 molar ratio of Ni
over Al at pH 2 and 40 °C for 6 h with 4% pulp density
(w/v). The proposed method could offer an effective and
simple way to modify the surface of AMD-forming min-
eral pyrite, making it magnetic for ease of separation. The
deposition of magnetic elements Ni or Co on the surface of
pyrite was facilitated by the galvanic displacement reaction
with Al. Moreover, this method is expected to have appli-
cations in other sulfide minerals, including chalcopyrite
(CuFeS2) and arsenopyrite (FeAsS), and can be potentially
used in preventing acid mine drainage (AMD) generation
by achieving the selective removal of sulfide minerals from
mine tailings.
ACKNOWLEDGMENTS
This study is a part of the PhD research project of the first
author, a scholarship recipient of an MRIWA Postgraduate
Research Scholarship at Curtin University. The authors
are grateful for the financial support from the Minerals
Research Institute of Western Australia (MRIWA).
REFERENCES
Brenner, A., Riddell, G. E., 1947. Deposition of nickel and
cobalt by chemical reduction. Journal of Research of
the National Bureau of Standards, 39(5), 385–395.
Craig, J. R., Vokes, F. M., 1993. The metamorphism of
pyrite and pyritic ores: an overview. Mineralogical
Magazine, 57(386), 3–18.
Figure 3. Results of XRD analysis of the (a) used FeS
2 Feed, non-magnetic fraction
obtained after (b) Co cementation and (c) Ni cementation at 25 °C, and magnetic
fraction obtained after (d) Co cementation and (e) Ni cementation at 50 °C using 6:4
mixing ratio of Al over FeS
2 and 0.50 molar ratio of Ni or Co over Al at pH 2 for 6 h
with 4% pulp density (w/v)
confirmed the deposition of metallic Ni and Co on the sur-
face of the FeS2, which allowed the FeS2 particles to be col-
lected in the magnetic fraction.
CONCLUSION
The results showed that the magnetic metal deposition of
Co and Ni occurred on the surface of FeS2 in the presence
of Al powder, making it possible to separate them using
magnetic separation. The highest magnetic fraction, almost
100%, was achieved with Ni cementation when using 6:4
mixing ratio of Al over FeS2 and 0.50 molar ratio of Ni
over Al at pH 2 and 40 °C for 6 h with 4% pulp density
(w/v). The proposed method could offer an effective and
simple way to modify the surface of AMD-forming min-
eral pyrite, making it magnetic for ease of separation. The
deposition of magnetic elements Ni or Co on the surface of
pyrite was facilitated by the galvanic displacement reaction
with Al. Moreover, this method is expected to have appli-
cations in other sulfide minerals, including chalcopyrite
(CuFeS2) and arsenopyrite (FeAsS), and can be potentially
used in preventing acid mine drainage (AMD) generation
by achieving the selective removal of sulfide minerals from
mine tailings.
ACKNOWLEDGMENTS
This study is a part of the PhD research project of the first
author, a scholarship recipient of an MRIWA Postgraduate
Research Scholarship at Curtin University. The authors
are grateful for the financial support from the Minerals
Research Institute of Western Australia (MRIWA).
REFERENCES
Brenner, A., Riddell, G. E., 1947. Deposition of nickel and
cobalt by chemical reduction. Journal of Research of
the National Bureau of Standards, 39(5), 385–395.
Craig, J. R., Vokes, F. M., 1993. The metamorphism of
pyrite and pyritic ores: an overview. Mineralogical
Magazine, 57(386), 3–18.
Figure 3. Results of XRD analysis of the (a) used FeS
2 Feed, non-magnetic fraction
obtained after (b) Co cementation and (c) Ni cementation at 25 °C, and magnetic
fraction obtained after (d) Co cementation and (e) Ni cementation at 50 °C using 6:4
mixing ratio of Al over FeS
2 and 0.50 molar ratio of Ni or Co over Al at pH 2 for 6 h
with 4% pulp density (w/v)