INVITED KEYNOTE & PLENARY PRESENTATIONS
(Click on links below to view the PDF files.)

Innovation, Energy Efficiency and Sustainability in Mineral Processing”, IMPC (International Mineral Processing Conference) 2010, Australasian Institute of Mining & Metallurgy, held in Brisbane, Queensland, Australia, September 8, 2010.

Lessons Learned from the Copper Industry Applied to Gold Extraction”, World Gold 2009 Conference, South African Institute of Mining & Metallurgy, held in Johannesburg, Guateng, South Africa, October 30, 2009.

The Role of Innovation in Mineral Processing and Metallurgical Plant Design”, International Symposium on Mineral Processing Plant Design, Society for Mining, Metallurgy & Exploration, Inc., held in Tucson, Arizona, USA, October 1, 2009.

Energy Efficiency and Copper Hydrometallurgy”, Hydrometallurgy 2008 Symposium in Honor of Robert S. Shoemaker, held in Phoenix, Arizona, USA, August 18, 2008.

Technology Development in the Copper Industry”, Sixth International Copper-Cobre 2007 Conference, Canadian Institute of Mining, Metallurgy & Petroleum, held in Toronto, Ontario, Canada, August 28, 2007.

Recent Developments in Copper Hydrometallurgy”, Sohn International Symposium Advanced Processing of Metals and Materials, The Minerals, Metals & Materials Society (TMS), held in San Diego, California, USA, August 28, 2006.

Phelps Dodge’s Approach to Technology Development and Innovation”, Codelco Innovative Technology Forum: Technological Innovation in Codelco – A World-Scale Experience, held in Santiago, Chile, September 12, 2005.

Pressure Leaching of Copper Concentrates”, Pressure Hydrometallurgy 2004, 34th Annual Hydrometallurgy Meeting of the Metallurgical Society of the Canadian Institute of Mining, Metallurgy & Petroleum, held in Banff, Alberta, Canada, October 25, 2004.

PUBLICATIONS

The Chemistry of Gold Extraction

Books:

Marsden, J. O. & House, C. I. 2006. The Chemistry of Gold Extraction (Second Edition). Littleton, CO: Society for Mining, Metallurgy and Exploration, Inc., Littleton, Colorado. 651 pp.

Dowling, E. C. and Marsden, J. O. (Editors). 2004. Plant Operators’ Forum 2004. Littleton, CO: Society for Mining, Metallurgy and Exploration, Inc., Littleton, Colorado. 164 pp.

Marsden, J. O. & House, C. I. 1992. The Chemistry of Gold Extraction. (First Edition) Published by Ellis Horwood Ltd, Chichester, U.K., Simon & Schuster International. 597 pp.

 

Published Papers:

Marsden, J.O. (2009) Lessons learned from the copper industry applied to gold extraction. Proc. World Gold 2009. Johannesburg, South Africa. October 2009. S. Afr. Inst. Min. & Met., Marshalltown, Guateng, South Africa.

Marsden, J.O. (2009) The role of innovation in mineral processing and metallurgical plant design. Proc. SME Symposium on Mineral Processing Plant Design, Tucson, AZ, Sept-Oct 2009. SME, Littleton, CO.

Marsden, J. O. (2008) Energy Efficiency and Copper Hydrometallurgy. Proc. Hydrometallurgy 2008 Symposium in Honor of Robert S. Shoemaker, Phoenix, Arizona. Society for Mining, Metallurgy & Exlporation, Inc., Littleton, Colorado. pp 29-42.

Marsden, J. O., Wilmot, J.C. & Hazen, N. (2007) Medium-temperature pressure leaching of copper concentrates – Part I: Chemistry and initial process development. Min. & Met. Proc. J., Vol. 24, No. 4, pp 193-204.

Marsden, J. O., Wilmot, J.C. & Hazen, N. (2007) Medium-temperature pressure leaching of copper concentrates – Part II: Development of direct electrowinning and an acid-autogenous process. Min. & Met. Proc. J., Vol. 24, No. 4,
pp 205-217.

Marsden, J. O., Wilmot, J.C. & Mathern, D.R. (2007) Medium-temperature pressure leaching of copper concentrates – Part III: Commercial demonstration at Bagdad, Arizona. Min. & Met. Proc. J., Vol. 24, No. 4, pp 218-225.

Marsden, J. O., Wilmot, J.C. & Smith, R.J. (2007) Medium-temperature pressure leaching of copper concentrates – Part IV: Application at Morenci, Arizona. Min. & Met. Proc. J., Vol. 24, No. 4, pp 226-236.

Marsden, J. O. (2007) Technology Development in the Copper Industry. Plenary presentation. Proc. Sixth International Copper-Cobre 2007 Conference, Vol. IV, Book 1. Eds. Riveros, P.A., Dixon, D.G., Dreisinger, D.B. & Collins M.J., Canadian Inst. Min., Met. & Pet., Montreal, Quebec, Canada. pp 31-77.

Marsden, J. O. & Wilmot, J. C. (2007) Sulfate-based flowsheet options for hydrometallurgical treatment of copper sulfide concentrates. Proc. Sixth International Copper-Cobre 2007 Conference, Vol. IV (Book 1), Eds. Riveros, P.A., Dixon, D.G., Dreisinger, D.B. & Collins M.J., Canadian Inst. Min., Met. & Pet., Montreal, Quebec, Canada. pp 77-100.

Vanderbeek, J. L., Linde, T. B., Brack, W. S., & Marsden, J. O. (2006) HPGR Implementation at Cerro Verde. Proc. International Autogenous and Semi-Autogenous Grinding Technology 2006. Eds. Allan, M.J., Major, K., Flintoff, B.C., Klein, B., & Mular, A.L. Dept. Min. Eng., University of British Columbia, Vancouver, Canada. pp 45-61.
PUBLICATIONS (Continued)

Marsden, J. O. (2006) Overview of Gold Processing Around the World. Min. & Met. Proc. J. Vol. 23, No. 3, pp 121-125.

Marsden, J. O. (2004) Technology Development and competitive advantage – Sustainable or short term? Proc. Plant Operators’ Forum 2004. Eds. Dowling, E.C. and Marsden, J. O., Society for Mining, Metallurgy and Exploration, Inc., Littleton, Colorado. pp 127-137.

Marsden, J. O., Brewer, R. E., & Hazen, W. W. (2003) Copper Concentrate Leaching Developments by Phelps Dodge Corporation. Proc. Hydrometallurgy 2003 Conference, Vol. 2. Eds. Young, C., Alfantazi, A., Anderson, C., James, A., Dreisinger, D. & Harris, B. The Minerals, Metals & Materials Society, Warrendale, Pennsylvania. pp 1429-1446.

Marsden, J. O. & Brewer, R. E. (2003) Hydrometallurgical Treatment of Copper Concentrates by Phelps Dodge at Bagdad. Proc. ALTA 2003 Copper-8 Conference. ALTA Metallurgical Services, Castlemaine, Victoria, Australia.

Kendrick, M.J. & Marsden, J. O. (2001) Candelaria Post Expansion Evolution of SAG Mill Liner Design and Milling Performance. Proc. International Autogenous and Semi-Autogenous Grinding Technology 2001 Conference, Vol. III. Eds. Barratt, D.J., Allan, M.J., & Mular, A.L. Dept. Min. Eng., University of British Columbia, Vancouver, Canada. pp 270-287.

Marsden, J. O. & Ogonowski, D. L. (1999) The Candelaria concentrator expansion project. SME Annual Meeting Preprint No. 99-139. Society for Mining, Metallurgy & Exploration, Inc., Littleton, Colorado.

Marsden, J .O. (1998) Operating ideas that have saved me some money – copper milling at Candelaria. Proc. SME Plant Operators Forum, Orlando, Florida. Ed. Halbe, D. N., Society for Mining, Metallurgy & Exploration, Inc. pp 110-124.

Chi, G., Fuerstenau, M.C. & Marsden, J.O. (1997) Study of Merrill-Crowe Processing Part I: Solubility of Zinc in Alkaline Cyanide Solution. Int. J. Min. Proc., 49. pp 171-183.

Marsden, J. O. (1996) How low can you go? Processing of low grade gold ores in North America. Proc. Hidden Wealth Conference, Ed. Glen, H.W. S. African Inst. Min. & Met., Johannesburg, South Africa. pp 115-123.

Miranda, D. G., Bassaure, F. T. & Marsden J. O. (1996) Evolution of liners for a 36 foot by 15 foot SAG mill at Candelaria. Proc. International Autogenous and Semi-Autogenous Grinding Technology 1996 Conference, Vol. III. Eds. Mular, A.J., Barratt, D.J., & Knight, D.A., Dept. Min. Eng., University of British Columbia, Vancouver, Canada. pp 857-880.

Wang, G. X., Fuerstenau, M. C. & Marsden, J. O. (1996) Zinc cementation of eluates from carbon adsorption systems. Min. & Met. Proc. J., Vol. 13, No. 1. pp 22-26.

Marsden, J.O., Pennington, R.I., Rocher, W. & Miranda, D. (1995) The Candelaria Copper-Gold Concentrator. Proc. Copper-Cobre 95 Conference, Santiago, Chile. Vol. II. Eds. Casali, A., Dobby, G.S., Molina, C., & Thoburn, W. Canadian Inst. Min., Met & Pet., Montreal, Quebec, Canada. pp 5-24.

Marsden, J.O., Todd, L.R. & Moritz, R. (1995) The effect of lift height, overall heap height and climate on heap leaching efficiency. AIME/SME Annual Meeting Preprint Number 95-229. Society for Mining, Metallurgy, & Exploration Inc., Littleton, Colorado.

Marsden, J.O. & Fuerstenau, M.C. (1993) Comparison of Merrill-Crowe Precipitation and Carbon Adsorption for
Precious Metals Recovery. Proc. XVIII International Mineral Processing Congress, Sydney, Australia. Aust. Inst. Min. & Met., Sydney, Australia. pp.

Marsden, J.O., Mansanti, J.G. & Sass, S.A. (1993) Innovative Methods for Precious Metals Recovery in North America. SME/AIME Annual Meeting, Reno, Nevada. February 1993.

Marsden, J.O. (1992) An Overview of Gold Processing Around the World. Mining Journal, International Gold Mining Newsletter. Vol. 19, No. 9, September, 1992. pp 138-141.

Marsden, J.O. (1992) Hopper Clarifiers in Gold Extraction. Abstract only in Proc. Randol Gold Forum, Vancouver, B.C., Canada. March 1992. (Full manuscript available from author)

Marsden, J.O. (1992) Process Selection for Gold Extraction. Abstract only in Proc. Randol Gold Forum, Vancouver, B.C., Canada. March 1992. (Full manuscript available from author)

Marsden, J.O., Gleason, M.F., Mansanti, J.G., & Arnold, J.R. (1990) Integrated Process Control at Gold Fields’ Chimney Creek Mine. SME/AIME Control ‘90 Symposium, Salt Lake City, Utah.

Marsden, J.O. & Arnold, J.R. (1990) Metallurgical Accounting at Gold Fields' Chimney Creek Mine. SME/AIME Control '90 Symposium. Salt Lake City, Utah. February 1990.

Marsden, J.O. (1990) Practical Aspects of the Chemistry of Zinc Precipitation from High Temperature Carbon Eluates. Proc. Randol Gold Forum, Squaw Valley, California. September 1990.

Marsden, J.O., Gleason, M.F., Mansanti, J.G., & Arnold, J.R. (1989) Integrated Process Control System at Gold Fields' Chimney Creek Mine. Proc. Inst. Min. & Met. - Metallurgy '89 Conference, London.

Mansanti, J.G., Arnold, J.R., Gourdie, J.H. and Marsden, J.O. (1989) The Double Thickener Circuit at Gold Fields' Chimney Creek Mine. Min. & Met. Proc. J., November 1989. pp 179-185.

Marsden, J.O. & Van Der Westhuizen, J.H.L. (1985) Double-vee Clarification of Pregnant Gold-Bearing Solution at the East Driefontein Gold Mine. Mine Metallurgical Managers' Assoc. of South Africa. Volume 86/2. South African Inst. Min. & Met., Johannesburg, South Africa. pp 29-49.


PATENTS

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Schmidt, R., “Method for Improving Metals Recovery Using High Temperature Leaching”; U.S. Patent No. 6,451,088. Date issued: September 17, 2002.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Bemelmens, C.M.A., “Process for Direct Electrowinning of Copper”; U.S. Patent No. 6,451,089. Date issued: September 17, 2002.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., and Baughman, D.R., “Method for Processing Elemental Sulfur-Bearing Materials Using High Temperature Pressure Leaching”; U.S. Patent No. 6,497,745. Date issued: December 24, 2002.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Schmidt, R., “Method for Improving Metals Recovery Using High Temperature Pressure Leaching”; U.S. Patent No. 6,626,979. Date issued: September 30, 2003.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Bemelmens, C.M.A., “Process for Direct Electrowinning of Copper”; U.S. Patent No. 6,663,689. Date issued: December 16, 2003.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., Baughman, D.R. and Schmidt, R., “Method for Recovery of Metals from Metal-Containing Materials Using Medium Temperature Pressure Leaching”; U.S. Patent No. 6,676,909. Date issued: January 13, 2004.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., and Baughman, D.R., “Method for Recovering Metal Values from Metal-Containing Materials Using High Temperature Pressure Leaching”; U.S. Patent No. 6,680,034. Date issued: January 20, 2004.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., and Baughman, D.R., “Method for Processing Elemental Sulfur-Bearing Materials Using High Temperature Pressure Leaching”; U.S. Patent No. 6,890,371. Date issued: May 10, 2005.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Schmidt, R., “Method for Improving Metals Recovery Using High Temperature Pressure Leaching”; U.S. Patent No. 6,893,482. Date issued: May 17, 2005.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Bemelmens, C.M.A., “System for Direct Electrowinning of Copper”; U.S. Patent No. 6,972,107. Date issued: December 6, 2005.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., and Baughman, D.R., “Method for Processing Elemental Sulfur-Bearing Materials Using High Temperature Pressure Leaching”; U.S. Patent No. 7,041,152. Date issued: May 9, 2006.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Schmidt, R., “Method for Improving Metals Recovery Using High Temperature Pressure Leaching”; U.S. Patent No. 7,125,436. Date issued: October 24, 2006.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., Baughman, D.R. and Schmidt, R., “Method for Recovery of Metals from Metal-Containing Materials Using Medium Temperature Pressure Leaching”; U.S. Patent No. 7,341,700. Date issued: March 11, 2008.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Bemelmens, C.M.A., “Process for Multiple Stage Direct Electrowinning of Copper”; U.S. Patent No. 7,462,272. Date issued: December 9, 2008.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Hazen, W.W., Thompson, P., and Baughman, D.R., “Method for Recovering Metal Values from Metal-Containing Materials Using High Temperature Pressure Leaching”; U.S. Patent No. 7,473,413. Date issued: January 6, 2009.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Bemelmens, C.M.A., “Process for Multiple Stage Direct Electrowinning of Copper”; U.S. Patent No. 7,476,308. Date issued: January 13, 2009.

Marsden, J.O., Brewer, legal representative; S.R., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W., Bemelmens, C.M.A, and Brewer, R.E., “Process for Recovery of Copper from Copper-Bearing Material Using Pressure Leaching, Direct Electrowinning and Solvent/Solution Extraction”; U.S. Patent No. 7,485,216. Date issued: February 3, 2009.

Sandoval, S.P., Stevens, A.C., Robinson, T.G., Marsden, J.O., and Gilbert, S.R., “System and Method for Producing Copper Powder by Electrowinning Using the Ferrous/Ferric Anode Reaction”; U.S. Patent No. 7,494,580. Date issued: February 24, 2009.

Marsden, J. O., Brewer, R.E., Robertson, J.M., Baughman, D.R., Thompson, P., Hazen, W.W. and Schmidt, R., “Method for Improving Metals Recovery Using High Temperature Pressure Leaching”; U.S. Patent No. 7,517,384. Date issued: April 14, 2009.

Marsden, J.O., Sandoval, S.P., Stevens, A. C., Robinson, T.G., and Gilbert, S.G., “Apparatus for Producing Metal Powder by Electrowinning”; U.S. Patent No. 7,591,934. Date issued: September 22, 2009.

PENDING PATENTS

Stevens, A.C., Gilbert, S.R., Sandoval, S.P., Robinson, T.G., and Marsden, J.O., “System and Method for Producing Copper Powder by Electrowinning in a Flow-Through Electrowinning Cell”; U.S. Patent Application No. US 2006/0016696. Date published: January 26, 2006.

Gilbert, S.R., Sandoval, S.P., Stevens, A.P., Robinson, T.G., and Marsden, J.O., “System and Method for Producing Metal Powder by Electrowinning”; U.S. Patent Application No. US 2006/0016697. Date published: January 26, 2006.