Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation
Bibliography: p. 149-160.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Chemical Engineering
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613229306347520 |
|---|---|
| access_status_str | Open Access |
| author | Breytenbach, Jacobus Nicolaas |
| author2 | Franzidis, Jean-Paul |
| author_browse | Breytenbach, Jacobus Nicolaas Franzidis, Jean-Paul |
| author_facet | Franzidis, Jean-Paul Breytenbach, Jacobus Nicolaas |
| author_sort | Breytenbach, Jacobus Nicolaas |
| collection | Thesis |
| description | Bibliography: p. 149-160. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/20457 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:47.627Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Chemical Engineering |
| publisherStr | Department of Chemical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/20457 An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation Breytenbach, Jacobus Nicolaas Franzidis, Jean-Paul Harris, Martin O'Connor, Cyril Chemical Engineering Bibliography: p. 149-160. The collection efficiency of quartz particles in four different particle-bubble contacting environments was investigated during this thesis. Flotation experiments were carried out in a hybrid flotation column that could be modified into three different cell configurations (a quiescent column cell, an agitated column cell and a Jameson-type cell), while the fourth cell environment comprised a laboratory batch subaeration flotation cell. High purity quartz was used as a probe ore in conjunction with a cationic collector and a commercial frother blend. The quartz was initially contaminated with organic material and needed to be cleaned by calcination. The cleaned quartz was divided into four narrow particle size fractions to determine the effect of particle size on particle collection efficiency. The quartz was floated over a wide range of collector dosages and frother dosage was kept constant during experiments. The flotation was conducted using tap water at neutral pH. Froth depth was kept shallow during all experiments in the hybrid column cell configurations to enable the investigation to focus specifically on the collection zone. The effect of contacting environment (cell type) on particle collection efficiency was investigated by considering the effect of particle hydrophobicity, particle size and agitation speed (turbulence) on flotation recovery in the different cell types. The unique particle-bubble contacting environments resulted in different particle collection efficiencies and it was found that increased contacting intensity generally led to increased efficiency of collection. Increased particle hydrophobicity generally resulted in increased particle collection efficiency, although the overdosing of collector led to decreased flotation recovery which was probably caused by combined collector double layer and flocculation effects. The effect of particle size on flotation recovery exhibited classical n-curve behaviour at intermediate collector dosages and the optimum particle size range as reported in the literature was confirmed. Intense contacting between particles and bubbles followed by relatively quiescent disengagement (such as the mechanism employed in the Jameson cell configuration) proved to be beneficial to collection of both fine and coarse particles. 2016-07-19T14:21:21Z 2016-07-19T14:21:21Z 1995 Master Thesis Masters MSc http://hdl.handle.net/11427/20457 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Chemical Engineering Breytenbach, Jacobus Nicolaas An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| thesis_degree_str | Master's |
| title | An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| title_full | An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| title_fullStr | An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| title_full_unstemmed | An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| title_short | An investigation of particle collection efficiency in different particle-bubble contacting environments in flotation |
| title_sort | investigation of particle collection efficiency in different particle bubble contacting environments in flotation |
| topic | Chemical Engineering |
| url | http://hdl.handle.net/11427/20457 |
| work_keys_str_mv | AT breytenbachjacobusnicolaas aninvestigationofparticlecollectionefficiencyindifferentparticlebubblecontactingenvironmentsinflotation AT breytenbachjacobusnicolaas investigationofparticlecollectionefficiencyindifferentparticlebubblecontactingenvironmentsinflotation |