1486 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
of activated carbon were utilized to try to isolate the influ-
ence of gold robbing by CM from other factors that can
influence the gold extraction in a polymetallic ore. While
the average of the delta gold extraction was found to be
higher for the high carbon samples, there was not a strong
correlation between the delta gold extractions and the CM
concentrations, indicating that there may be structurally
different types of CM present with different degrees of gold
robbing capacity. A select number of samples were classified
by Raman as containing a crystalline or amorphous carbon
structure and this classification was consistent with the gold
robbing classification determined by the gold-rob #.While
the gold robbing and structure of the CM in the samples
appeared to be in line with the CM content in the ore, the
delta gold extractions did not seem to be directly related
to these gold robbing characteristics, which indicates that
other factors are influencing the enhanced recoveries in the
presence of activated carbon.
ACKNOWLEDGMENTS
The support and collaboration of the Newmont Technical
Services Processing team and site operations team mem-
bers who took part in various discussions about the results
presented in this paper are gratefully acknowledged by the
authors. Their helpful feedback and ideas contributed to
enhancing the direction and quality of this work.
REFERENCES
Baron, Y.I., Choi, Y., Jeffrey, M. 2016. Double-Refractory
Carbonaceous Sulfidic Gold Ores. In Gold Ore
Processing, Project Development and Operations, 2nd ed.
Edited by M.D. Adams. Amsterdam: Elsevier.
Darteh, F.K., Abdul-Wasiu, M., Boateng, A., Ofori-
Sarpong, G. 2020. Predicting the Extent of Preg-
robbing Based on the Maturity of Carbonaceous Gold
Ores. 6th UMaT Biennial International Mining and
Mineral Conference, Tarkwa, Ghana, 433–438.
Goodall, W.R., Leatham, J.D., Scales, P.J. 2005. A New
Method for Determination of Preg-robbing in Gold
Ores. Minerals Engineering 18: 1135–1141.
Hart, B.R., Dimov, S.S., Mermillod-Blondin, R. Fournier, J.
2011. Procedure for Characterization of Carbonaceous
Matter in an Ore Sample with Estimation Towards its
Pres-Robbing Capacity. 50th Annual Conference of
Metallurgists of CIM. Montreal, QC, Canada.
Helm, M., Vaughan, J., Staunton, W.P., Avraamides.
2009. An investigation of the carbonaceous component
of preg-robbing gold ores. World Gold Conference, The
Southern African Institute of Mining and Metallurgy.
Gauteng, South Africa.
Hu, G., Li, Z., Liu, J., Xiao, C., Zhang, Q., Liu, F.,
Wang, W., Zhang, P. 2022. Genetic Linkage Between
Carbonaceous Materials and Triassic Gold Deposits in
the Liaodong Peninsula, Northeastern North China
Craton: Insights from Raman Spectroscopy and CO
isotope analysis. Ore Geology Reviews 150: 105182.
Jankolovits, J., Reyes, G.S., Santana, A. 2020. Beyond
Simple Mechanism: The Multifaceted Impact of Carbon
Depressants on the Flotation of Carbonaceous Sulfide
Ores. XXX International Mineral Processing Congress,
Cape Town, South Africa.
Large, R.R., Bull, S.W., Maslennikov, V. 2011. A
Carbonaceous Sedimentary Source-rock Model for
Carlin-type and Orogenic Gold Deposits. Society of
Economic Geology 106: 331–358.
Lind, P.J., Tomlinson, M.A, Awmack, J. 2018. Organic
Mitigation at Peñasquito. 50th Annual Canadian
Mineral Processors Operators Conference. Ottawa,
ON, Canada.
Marsden, J.O. &House, C.I. 2006. Chemistry of Gold
Extraction. 2nd ed. Littleton, CO: SME.
Miller, J.D, Wan, R.-Y., Diaz, X. 2016. Preg-Robbing
Gold Ores. In Gold Ore Processing, Project Development
and Operations, 2nd ed. Edited by M.D. Adams.
Amsterdam: Elsevier.
Ng, W.S., Yang, Y., Su, X., Zhong, S., Chen, M. 2022.
Characterization of Preg-robbing Carbonaceous
Minerals from the Shuiyindong Carlin-type Gold
Deposit via Spectroscopic Techniques. Mining,
Metallurgy &Exploration 39: 169–188.
Olson, J. 2017. The Prediction of Carbon-in-leach Gold
Recovery Using Near-infrared Spectroscopy. 56th
Conference of Metallurgists World Gold and Nickel-
Cobalt, Vancouver, BC, Canada.
Osseo-Asare, K.A., Afenya, P.M., Abotsi, G.M.K. 1984.
Carbonaceous Matter in Gold Ores: Isolation,
Characterization and Adsorption Behavior in
Aurocyanide Solutions, Precious Metals: Mining,
Extraction and Processing, Los Angeles, CA,
Metallurgical Society of AIME.
Radtke, A.S. &Scheiner B.J. 1970. Studies of Hydrothermal
Gold Deposition -(pt.) 1, Carlin Gold Deposit,
Nevada, The Role of Carbonaceous Materials in Gold
Deposition. Economic Geology 65 (2): 87–102.
Rees, K.L., van Deventer, J.S.J. 2000. The mechanism of
enhanced gold extraction from ores in the presence of
activated carbon, Hydrometallurgy 58:151–167.
of activated carbon were utilized to try to isolate the influ-
ence of gold robbing by CM from other factors that can
influence the gold extraction in a polymetallic ore. While
the average of the delta gold extraction was found to be
higher for the high carbon samples, there was not a strong
correlation between the delta gold extractions and the CM
concentrations, indicating that there may be structurally
different types of CM present with different degrees of gold
robbing capacity. A select number of samples were classified
by Raman as containing a crystalline or amorphous carbon
structure and this classification was consistent with the gold
robbing classification determined by the gold-rob #.While
the gold robbing and structure of the CM in the samples
appeared to be in line with the CM content in the ore, the
delta gold extractions did not seem to be directly related
to these gold robbing characteristics, which indicates that
other factors are influencing the enhanced recoveries in the
presence of activated carbon.
ACKNOWLEDGMENTS
The support and collaboration of the Newmont Technical
Services Processing team and site operations team mem-
bers who took part in various discussions about the results
presented in this paper are gratefully acknowledged by the
authors. Their helpful feedback and ideas contributed to
enhancing the direction and quality of this work.
REFERENCES
Baron, Y.I., Choi, Y., Jeffrey, M. 2016. Double-Refractory
Carbonaceous Sulfidic Gold Ores. In Gold Ore
Processing, Project Development and Operations, 2nd ed.
Edited by M.D. Adams. Amsterdam: Elsevier.
Darteh, F.K., Abdul-Wasiu, M., Boateng, A., Ofori-
Sarpong, G. 2020. Predicting the Extent of Preg-
robbing Based on the Maturity of Carbonaceous Gold
Ores. 6th UMaT Biennial International Mining and
Mineral Conference, Tarkwa, Ghana, 433–438.
Goodall, W.R., Leatham, J.D., Scales, P.J. 2005. A New
Method for Determination of Preg-robbing in Gold
Ores. Minerals Engineering 18: 1135–1141.
Hart, B.R., Dimov, S.S., Mermillod-Blondin, R. Fournier, J.
2011. Procedure for Characterization of Carbonaceous
Matter in an Ore Sample with Estimation Towards its
Pres-Robbing Capacity. 50th Annual Conference of
Metallurgists of CIM. Montreal, QC, Canada.
Helm, M., Vaughan, J., Staunton, W.P., Avraamides.
2009. An investigation of the carbonaceous component
of preg-robbing gold ores. World Gold Conference, The
Southern African Institute of Mining and Metallurgy.
Gauteng, South Africa.
Hu, G., Li, Z., Liu, J., Xiao, C., Zhang, Q., Liu, F.,
Wang, W., Zhang, P. 2022. Genetic Linkage Between
Carbonaceous Materials and Triassic Gold Deposits in
the Liaodong Peninsula, Northeastern North China
Craton: Insights from Raman Spectroscopy and CO
isotope analysis. Ore Geology Reviews 150: 105182.
Jankolovits, J., Reyes, G.S., Santana, A. 2020. Beyond
Simple Mechanism: The Multifaceted Impact of Carbon
Depressants on the Flotation of Carbonaceous Sulfide
Ores. XXX International Mineral Processing Congress,
Cape Town, South Africa.
Large, R.R., Bull, S.W., Maslennikov, V. 2011. A
Carbonaceous Sedimentary Source-rock Model for
Carlin-type and Orogenic Gold Deposits. Society of
Economic Geology 106: 331–358.
Lind, P.J., Tomlinson, M.A, Awmack, J. 2018. Organic
Mitigation at Peñasquito. 50th Annual Canadian
Mineral Processors Operators Conference. Ottawa,
ON, Canada.
Marsden, J.O. &House, C.I. 2006. Chemistry of Gold
Extraction. 2nd ed. Littleton, CO: SME.
Miller, J.D, Wan, R.-Y., Diaz, X. 2016. Preg-Robbing
Gold Ores. In Gold Ore Processing, Project Development
and Operations, 2nd ed. Edited by M.D. Adams.
Amsterdam: Elsevier.
Ng, W.S., Yang, Y., Su, X., Zhong, S., Chen, M. 2022.
Characterization of Preg-robbing Carbonaceous
Minerals from the Shuiyindong Carlin-type Gold
Deposit via Spectroscopic Techniques. Mining,
Metallurgy &Exploration 39: 169–188.
Olson, J. 2017. The Prediction of Carbon-in-leach Gold
Recovery Using Near-infrared Spectroscopy. 56th
Conference of Metallurgists World Gold and Nickel-
Cobalt, Vancouver, BC, Canada.
Osseo-Asare, K.A., Afenya, P.M., Abotsi, G.M.K. 1984.
Carbonaceous Matter in Gold Ores: Isolation,
Characterization and Adsorption Behavior in
Aurocyanide Solutions, Precious Metals: Mining,
Extraction and Processing, Los Angeles, CA,
Metallurgical Society of AIME.
Radtke, A.S. &Scheiner B.J. 1970. Studies of Hydrothermal
Gold Deposition -(pt.) 1, Carlin Gold Deposit,
Nevada, The Role of Carbonaceous Materials in Gold
Deposition. Economic Geology 65 (2): 87–102.
Rees, K.L., van Deventer, J.S.J. 2000. The mechanism of
enhanced gold extraction from ores in the presence of
activated carbon, Hydrometallurgy 58:151–167.