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A study of the factors affecting copper cementation of gold from ammoniacal thiosulphate solution Guerra, Eduard
Abstract
Thiosulphate leaching of gold is a proposed alternative to cyanide leaching for certain types of refractory gold ores. The most promising method for recovering gold from thiosulphate leach solutions is by copper cementation. This study focused on determining how the factors of pH/ammonia concentration, copper concentration, thiosulphate concentration, sulphite concentration, and temperature, commonly manipulated in thiosulphate leaching studies, affect gold cementation performance using copper. These factors were varied in artificial leach solutions according to the ranges typically found in literature. Both powder cementation and rotating disk electrode cementation were used to study the kinetics of gold cementation. Overall, the cementation of gold by copper from ammoniacal thiosulphate solution was concluded to be under mass transfer control. Higher temperatures and pH/ammonia concentration were determined to positively affect the rate of gold cementation. Conversely, sulphite and copper in solution were established to negatively affect cementation performance.
Item Metadata
Title |
A study of the factors affecting copper cementation of gold from ammoniacal thiosulphate solution
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1997
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Description |
Thiosulphate leaching of gold is a proposed alternative to cyanide leaching for certain
types of refractory gold ores. The most promising method for recovering gold from
thiosulphate leach solutions is by copper cementation. This study focused on
determining how the factors of pH/ammonia concentration, copper concentration,
thiosulphate concentration, sulphite concentration, and temperature, commonly
manipulated in thiosulphate leaching studies, affect gold cementation performance using
copper. These factors were varied in artificial leach solutions according to the ranges
typically found in literature. Both powder cementation and rotating disk electrode
cementation were used to study the kinetics of gold cementation. Overall, the
cementation of gold by copper from ammoniacal thiosulphate solution was concluded to
be under mass transfer control. Higher temperatures and pH/ammonia concentration
were determined to positively affect the rate of gold cementation. Conversely, sulphite
and copper in solution were established to negatively affect cementation performance.
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Extent |
5210447 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-04-27
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0078678
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1998-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.