2289 COMPARISON OF DENVER AND LEEDS LABORATORY FLOTATION CELLS: EFFECT OF PARTICLE SIZE
DOI:
https://doi.org/10.17159/Abstract
In this paper, the authors performed experiments in the Denver and Leeds batch flotation devices at the University of Pretoria at various particle sizes to evaluate the difference in performance of the devices. Quartz was used in a single mineral system at discrete sizes fractions, -25 µm, 25-43 µm, 43-75 µm, and 75-106 µm. The reagent regime was kept constant at 25 g/t Flotigam EDA as the collector, no frother and NaOH to modify pH to 9.5. The impeller speed of the Denver was set at 1200 rpm whereas the Leeds cell operated at 1400 rpm. Air addition was kept constant at 2 L/min. Concentrates were collected at 1-minute intervals employing a scraping frequency of 10 s. The results highlighted the effect of particle size, it found the typical ‘n-shaped’ response. More collector was added to improve the recovery of the -25 µm fraction. For all experiments, the Denver batch flotation cell outperformed (defined by higher recovery) the Leeds device.
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