3. Electronic Theses and Dissertations (ETDs) - All submissions

Permanent URI for this communityhttps://wiredspace.wits.ac.za/handle/10539/45

Browse

Filters

20151

Settings

Author: search.filters.author.Youlton, BrandonSubject: search.filters.subject.Mineralogy.

Search Results

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    The process mineralogy of selected Southern African uranium ores
    (2015-05-06) Youlton, Brandon
    During the acid leaching of uranium, gangue-reagent interactions have both negative and positive consequences. Gangue dissolution increases reagent costs, and in some cases can prevent the economic acid leaching of an ore, but can also increase uranium mineral exposure and improve recoveries. Due to rapid dissolution kinetics, the acid consumption characteristics of the various carbonate species are readily predicted, however the same is not true of silicate gangue. Due to factors including slower leach rates, incongruent dissolution, parabolic kinetics, and surface area, pH and temperature dependence, the gangue acid consumption characteristics of silicate minerals are significantly more complex. A detailed mineralogical investigation and acid leach tests were conducted on sandstone- and granite-hosted uranium ore samples. The dissolution characteristics of the more common gangue phases were determined. The study demonstrated that gangue-reagent interactions and U dissolution can be predicted from mineralogical data. A model was developed which allows for the use of mineralogical and geochemical data to predict gangue reagent consumption. The basic framework of the model is universally applicable, but may require calibration, depending on the mineral assemblage and complexity of a specific uranium deposit.
Copyright Ownership Is Guided By The University's

Intellectual Property policy

Students submitting a Thesis or Dissertation must be aware of current copyright issues. Both for the protection of your original work as well as the protection of another's copyrighted work, you should follow all current copyright law.