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The hydraulic transport of high concentration stabilized flow full plant mineral tailings
Summary in English.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Civil Engineering
2014
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| _version_ | 1867613284157358080 |
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| access_status_str | Open Access |
| author | Paterson, Angus John Cawood |
| author2 | Lazarus, JH |
| author_browse | Lazarus, JH Paterson, Angus John Cawood |
| author_facet | Lazarus, JH Paterson, Angus John Cawood |
| author_sort | Paterson, Angus John Cawood |
| collection | Thesis |
| description | Summary in English. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5011 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:41.762Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Civil Engineering |
| publisherStr | Department of Civil Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/5011 The hydraulic transport of high concentration stabilized flow full plant mineral tailings Paterson, Angus John Cawood Lazarus, JH Civil Engineering Summary in English. Photocopy of typescript. Includes bibliography. This thesis involves an analytical and experimental investigation of the flow behaviour of high concentration stabilized mineral tailings used as backfill material. At high solids concentrations "anomalous" behaviour occurs and is indicated by diameter dependancy on rheogram curves. These curves are not coincident in the laminar flow region. The anomalous behaviour is examined by postulating the following mechanisms : 1. Slip velocity at the pipe wall 2. Wall effects due to particle interaction 3 . Boundary layer effects 4. Plug flow at high concentrations 5. Particle migration away from the wall leaving a sheared annular zone 6. Lateral dispersive stress acting between particle and pipe wall. The mechanism responsible for "anomalous" behaviour is found to be due to the presence of a dispersive stress acting on the pipe wall due to particle-particle and pipe wall contact. This only occurs above a critical solids concentration ratio which is defined in terms of the critical void ratio or freely settled particle concentration. The total wall shear stress is a combination of both the viscous shear stress and the solid shear stress due to the lateral dispersive stress. Measured data was obtained from several test facilities. in pipe diameters ranging from 13,48 mm to 101,5 mm and for solids volumetric concentrations from 25% to 55%. Measurements included mean mixture velocity, pressure gradient, in situ and delivered volumetric concentration, temperature and the solids particle size distribution. Vertical down pipeline pressure gradients were obtained for a 40 mm NB pipeline which was constructed for the research. A tube viscometer was used to obtain rheological parameters. The measured data was compared with several analytical models using the log standard error. Existing models were found to be unsuitable for these slurries. The "anomalous" behaviour of the high concentration stabilized slurries is explained. The flow behaviour of these slurries is analysed in detail. The output is in the form of a user friendly interactive pipeline design computer program. 2014-07-31T10:26:18Z 2014-07-31T10:26:18Z 1991 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/5011 eng application/pdf Department of Civil Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Civil Engineering Paterson, Angus John Cawood The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| thesis_degree_str | Doctoral |
| title | The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| title_full | The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| title_fullStr | The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| title_full_unstemmed | The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| title_short | The hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| title_sort | hydraulic transport of high concentration stabilized flow full plant mineral tailings |
| topic | Civil Engineering |
| url | http://hdl.handle.net/11427/5011 |
| work_keys_str_mv | AT patersonangusjohncawood thehydraulictransportofhighconcentrationstabilizedflowfullplantmineraltailings AT patersonangusjohncawood hydraulictransportofhighconcentrationstabilizedflowfullplantmineraltailings |