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UBC Theses and Dissertations
Biooxidation of a zinc sulphide ore Lehmann, Matthew Karl Wilhelm
Abstract
An experimental program was conducted on a zinc-sulphide ore containing 15% zinc in support of the development of the Teck Cominco HydroZinc™ process. The two primary types of experiments that were conducted were bacterially assisted short column experiments, and controlled potential, isothermal, chemical leaching experiments. This program was carried out in order to determine the kinetics of heap biooxidation of this zinc ore at controlled temperatures, and to determine the rates of heat generation under those conditions. In addition, the ores' topology, activation energy, and dependence on ferric and ferrous ions were determined. Once the primary objective of generating consistent, meaningful data was achieved, a concerted effort was made to fit the results with an existing mathematical model. This exercise was met with mixed results and it was concluded that the mathematical model, in its current stage of development, is insufficient to accurately describe the leaching of this ore. It was concluded from both the experimental data and the mathematical fits that the rate of bacterial leaching of this zinc ore is limited by transport of oxygen into solution. Results of the potentiostatic experiments indicate that the ore follows a variable order model, has an activation energy of 58.23 kJ mol ⁻¹, a reaction order of 2.30, and a dependency on ferric ions of O.342.
Item Metadata
Title |
Biooxidation of a zinc sulphide ore
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2003
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Description |
An experimental program was conducted on a zinc-sulphide ore containing 15% zinc in
support of the development of the Teck Cominco HydroZinc™ process. The two primary
types of experiments that were conducted were bacterially assisted short column experiments,
and controlled potential, isothermal, chemical leaching experiments.
This program was carried out in order to determine the kinetics of heap biooxidation of this
zinc ore at controlled temperatures, and to determine the rates of heat generation under those
conditions. In addition, the ores' topology, activation energy, and dependence on ferric and
ferrous ions were determined.
Once the primary objective of generating consistent, meaningful data was achieved, a
concerted effort was made to fit the results with an existing mathematical model. This
exercise was met with mixed results and it was concluded that the mathematical model, in its
current stage of development, is insufficient to accurately describe the leaching of this ore.
It was concluded from both the experimental data and the mathematical fits that the rate of
bacterial leaching of this zinc ore is limited by transport of oxygen into solution. Results of
the potentiostatic experiments indicate that the ore follows a variable order model, has an
activation energy of 58.23 kJ mol ⁻¹, a reaction order of 2.30, and a dependency on ferric ions
of O.342.
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Extent |
8818288 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-10-30
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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 |
10.14288/1.0078638
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2003-11
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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.