The effect of impeller-stator design on bubble size: Implications for froth stability and flotation performance

2020 ◽  
Vol 157 ◽  
pp. 106533
Author(s):  
Diego Mesa ◽  
Angus J. Morrison ◽  
Pablo R. Brito-Parada
Keyword(s):  
Bubble Size ◽  
Froth Stability ◽  
Flotation Performance ◽  
Stator Design

Influence of coal particles on froth stability and flotation performance

2015 ◽  
Vol 81 ◽  
pp. 96-102 ◽  
Author(s):  
Long Liang ◽  
Zhiyuan Li ◽  
Yaoli Peng ◽  
Jiakun Tan ◽  
Guangyuan Xie
Keyword(s):  
Coal Particles ◽  
Froth Stability ◽  
Flotation Performance

scholarly journals Flotation of Carbonaceous Matter from a Double Refractory Gold Ore: The Effect of MIBC on Flotation Performance and Kinetics

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1021
Author(s):  
Sugyeong Lee ◽  
Charlotte E. Gibson ◽  
Ahmad Ghahreman
Keyword(s):  
Bubble Size ◽  
Gold Recovery ◽  
Carbonaceous Matter ◽  
Flotation Kinetics ◽  
Pressure Oxidation ◽  
Gold Ore ◽  
Refractory Gold ◽  
Flotation Performance ◽  
Thiosulfate Leaching

The use of alkaline pressure oxidation to pretreat refractory gold ore often results in insufficient gold recovery (<60%) in downstream thiosulfate leaching. To improve gold recovery, flotation was considered for the separation of carbonaceous matter (C-matter). In this study, the effect of MIBC on C-matter flotation was investigated to understand the role of the frother in bubble and froth formation and on flotation kinetics. MIBC dosages between 30 and 150 g/t were used in combination with 500 g/t of kerosene as a collector. The results showed that the recovery and selectivity of C-matter were improved with increasing MIBC dosages. Improved selectivity at higher MIBC dosages was attributed to faster C-matter recovery as bubble size decreased to the critical coalescence concentration (CCC) and to changes to the foam structure. Analysis of flotation kinetics showed that the flotation rate increased as the MIBC dosage increased due to the decreasing bubble size and the reduced induction time caused by the interaction between the collector and the frother. The results of this study explain the role of MIBC in C-matter flotation and can be used as a design basis for scavenger-cleaner flotation testing. Overall, the results show the potential for flotation as a means to improve gold recovery in thiosulfate leaching through the removal of C-matter.

scholarly journals Comparative study of the main flotation frothers using a new HYDROMESS adapted technique

2014 ◽  
Vol 67 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Moacir Medeiros Veras ◽  
Carlos Adolpho Magalhães Baltar ◽  
João Bosco de Araújo Paulo ◽  
José Yvan Pereira Leite
Keyword(s):  
Surface Tension ◽  
Comparative Study ◽  
Bubble Size ◽  
Drop Size ◽  
New Technique ◽  
Methyl Isobutyl ◽  
Flotation Process ◽  
Selective Action ◽  
Froth Stability ◽  
A New Technique

Stability of bubble size in the pulp zone and froth control is an important parameter for a successful flotation process. The present study compares the action of the main frothers in terms of: mean bubble size in the pulp zone, froth stability, surface-tension-lowering ability and reagent participation in flotation of a naturally hydrophobic mineral. Bubble size was determined using a new technique adapted from HYDROMESS, a device designed to measure drop size. The remaining indicators were obtained by determining surface tension and conducting flotation tests with the addition of hydrophobic (graphite) and hydrophilic (calcite) particles. The results indicate that methyl isobutyl carbinol (MIBC) is the most efficient frother in controlling coalescence, with critical coalescence concentration (CCC) reached at 20 ppm. Moreover, this frother has greater potential for selective action, since it increased calcite entrainment by only 2.3% at a concentration of 30 ppm. In flotation tests with a sample of graphite, MIBC produced higher recoveries.

scholarly journals Role of Sparger Configuration in Determining Flotation Performance under Oscillatory Air Supply

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 638
Author(s):  
Yiming Ji ◽  
Ajuan Song ◽  
Chao Li ◽  
Yijun Cao
Keyword(s):  
Bubble Size ◽  
Plate Thickness ◽  
Nonlinear Relationship ◽  
Chamber Volume ◽  
Flotation Recovery ◽  
Air Supply ◽  
Flotation Performance ◽  
Orifice Size

Bubble size is crucial for determining flotation efficiency. Fine bubbles can be cost-effectively generated using a multi-orifice sparger with oscillatory air supply. Sparger configuration is defined by the orifice size, the plate thickness and the chamber volume. To date, the effect of sparger configuration on bubble size with oscillatory air supply is not clear yet. To facilitate the control of bubble size formed with oscillatory air supply, the present work investigated the dependence of bubble size on sparger configuration. It was found that bubble size was positively correlated with the chamber volume and the orifice size, while a nonlinear relationship was observed with the plate thickness. Besides, it was found that flotation recovery decreased over increasing bubble size when changing the sparger configuration. The results indicated that sparger configuration exhibited a significant effect on flotation performance via influencing bubble size when oscillatory air supply was applied.

Effect of Clay Slime on the Froth Stability and Flotation Performance of Bastnaesite with Different Particle Sizes

2019 ◽  
Vol 60 (2) ◽  
pp. 107-117 ◽  
Author(s):  
J. Ran ◽  
X. Qiu ◽  
Z. Hu ◽  
Q. Liu ◽  
B. Song ◽  
...  
Keyword(s):  
Particle Sizes ◽  
Froth Stability ◽  
Flotation Performance
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