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Spigot capacity of dense medium cyclones
Dissertation (MEng (Metallurgical))--University of Pretoria, 2008.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613569048117248 |
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| access_status_str | Open Access |
| author2 | Bosman, Jeremy B. |
| author_browse | Bosman, Jeremy B. |
| author_facet | Bosman, Jeremy B. |
| collection | Thesis |
| dc_rights_str_mv | © University of Pretoria 20 |
| description | Dissertation (MEng (Metallurgical))--University of Pretoria, 2008. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/24061 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:38:13.749Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/24061 Spigot capacity of dense medium cyclones Bosman, Jeremy B. mohloana.magwai@up.ac.za Magwai, Mohloana Kwena Dense medium cyclone Roping Spigot loading Spigot capacity Dense medium separation Hydrocyclone UCTD Dissertation (MEng (Metallurgical))--University of Pretoria, 2008. Dense medium cyclones are used extensively in the mineral processing industry to beneficiate various minerals including coal, diamonds and iron ore, amongst others. According to Reeves (2002), .the cyclone has been installed in over one-quarter of the coal preparation plants worldwide.. Dense medium cyclones have the ability to achieve high capacities, and simultaneously obtain sharp separations and high separation efficiencies. However, this piece of equipment does have a shortcoming in that its capacity is constrained by the solids carrying capacity of the spigot. This is termed the spigot capacity. There is uncertainty on whether the spigot capacities specified by DSM (Dutch State Mines), the original developers of the dense medium cyclone, can be increased or not, and how these capacities were determined. The purpose of this study is to establish a methodology to determine the spigot capacities of dense medium cyclones, and determine the parameters that influence these capacities. In order to illustrate the significance of increasing the capacity of dense medium cyclones, the following coal example is used: In 2005, South Africa produced about 245Mt of coal valued at R35.86 billion. A significant proportion of this coal is beneficiated through dense medium cyclones. Therefore, an increase in the cyclone capacity, even if relatively small, represents a large number in terms of tonnages of coal produced or monetary gains. It has been established clearly in this investigation that the maximum spigot capacity is reached at the onset of roping. A critical sinks ore concentration at which spigot overloading occurs has been observed. The simplest and best indicator of possible spigot overloading has been established to be the sinks ore concentration, measurement of this parameter could, however, prove challenging on most industrial cyclones. Further, spigot overloading of a dense medium cyclone can be detected visually by observing the discharge type at the sinks and monitoring particle misplacement to the floats stream. A regression model that quantifies the spigot capacity, in terms of ore and slurry, has been developed. Various parameters were considered in the model, these include: cyclone geometry, feed head, medium density, and medium grade. Parameters that influence the spigot capacity of dense medium cyclones have been established, and their effect on the spigot capacity has been quantified. The spigot capacity values obtained in this investigation were compared with those specified by DSM, and it was concluded that there is large potential to increase the .spigot capacities. specified by DSM. Materials Science and Metallurgical Engineering unrestricted 2013-09-06T16:34:12Z 2008-07-07 2013-09-06T16:34:12Z 2007-09-05 2008-07-07 2008-04-22 Dissertation a 2007 http://hdl.handle.net/2263/24061 http://upetd.up.ac.za/thesis/available/etd-04222008-091807/ © University of Pretoria 20 application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Dense medium cyclone Roping Spigot loading Spigot capacity Dense medium separation Hydrocyclone UCTD Spigot capacity of dense medium cyclones |
| title | Spigot capacity of dense medium cyclones |
| title_full | Spigot capacity of dense medium cyclones |
| title_fullStr | Spigot capacity of dense medium cyclones |
| title_full_unstemmed | Spigot capacity of dense medium cyclones |
| title_short | Spigot capacity of dense medium cyclones |
| title_sort | spigot capacity of dense medium cyclones |
| topic | Dense medium cyclone Roping Spigot loading Spigot capacity Dense medium separation Hydrocyclone UCTD |
| url | http://hdl.handle.net/2263/24061 http://upetd.up.ac.za/thesis/available/etd-04222008-091807/ |