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Title: | Derivation of methodology capable of identifying suitable collectors for coal flotation by using surface dependant techniques | Authors: | De Jager, Susanna Gertruida Elizabeth | Keywords: | Coal;Flotation;Chemistry | Issue Date: | 2002 | Publisher: | Cape Technikon | Abstract: | The aim of the study was to develop an understanding of fine coal flotation emphasizing developing methodology capable of selecting the optimum flotation reagent. A secondary aim was to use the experimental data in a statistical program to validate the findings and investigate correlations between flotation performance and coal characteristics. The predictions that were made from the coal characterisation results were confirmed. Oleic acid, iso-decanol and dodecene resulted in the best flotation performance on the coal samples that were evaluated. This is in agreement with previous research findings, that oleic acid is a good collector for coal and that branched hydrocarbons also increase flotation yields. The ability of unsaturated hydrocarbons to increase flotation yield was also confirmed. The study included 5 coal samples from different collieries - Twistdraai (Highveld seam 3 and 4), Waterberg (Zone 10 -11), Syferfontein seam 5 upper (Highveld) and Witbank seam 2 and seam 4. Twistdraai, Waterberg and Syferfontein seam 5 upper were all found to be vitrinite rich coals. The Witbank coals are both more inertinite rich. The feed ash contents determined for the flotation feed samples were 28.8% for Twistdraai coal, 13.9% for Syferfontein seam 5 upper, 28.8% for Waterberg coal, 16.1% for Witbank seam 2 coal and 33.8% for Witbank seam 4 coal. The coal characterisation study included petrographic analysis, proximate analysis, float-sink analysis, oxygen-containing functional groups, surface extraction, flotation release analysis and contact angle measurements. | Description: | Thesis (MTech (Chemistry))--Cape Technikon, Cape Town, 2002 | URI: | http://hdl.handle.net/20.500.11838/741 |
Appears in Collections: | Chemistry - Masters Degrees |
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200737678_De Jager_SGE_2002.pdf | 3.34 MB | Adobe PDF | View/Open |
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