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Showing 1 to 20 of 386 for “"flotation"”.
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A hydrodynamic investigation of platinum flotation in a pilot flotation plant
… effect of impeller speed and air flowrate on the flotation of platinum in mechanical flotation cells.
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Dissolved air (pressure) flotation
… establish the basic parameters influencing the flotation process, or their inter-relationships, on a quantitative basis for the purpose of developing rational design procedures. This thesis investigates those parameters influencing solids removal and thickening by dissolved-air (pressure) …
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Hydrophobic Forces in Flotation
… understand the role of hydrophobic forces in flotation. The force measurements were conducted between a flat mineral substrate and a hydrophobic glass sphere in aqueous solutions. It is assumed that the hydrophobic glass sphere may simulate the behavior of air bubbles during flotation. The …
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The flotation of fines
The flotation of very fine ores is desirable because of the occurrence of some ores that require fine grinding to achieve liberation. The literature has been concerned with electrical and chemical effects at the interface of finely ground minerals. The writer proposed to investigate the effect of …
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The effect of flotation reagents on the coagulation and dewatering of flotation tailings
… water scarcity, especially in PGM mining, where flotation tailings pose serious difficulties. Water constitutes 80-85% of the mineral pulp in the flotation process, emphasising the significance of its role. However, water recycling from tailings dams and dewatering systems is becoming …
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Coarse Particle Flotation of Coarse Gold and Gold-bearing Ore by Fluidized-bed-flotation
The froth flotation process has been the most widely used mineral concentration technique for more than a century. However, neither flotation columns nor conventional flotation cells are efficient in processing coarse mineral-bearing particles. Most sulfide mineral particles, above a particle size …
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The effect of energy input on flotation kinetics in an oscillating grid flotation cell
… important role in particle-bubble contacting in flotation. This thesis investigates the effect of energy input (or agitation) on the flotation kinetics of quartz in a novel oscillating grid flotation cell. The effects of bubble size and particle size have been recognized as important variables …
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The collectorless flotation of sphalerite
The flotation of sphalerite has been demonstrated without the use of collectors. The effect of redox potential, pH, and copper-activation have been investigated in tests using samples of pure mineral. It has been found that in general, collectorless flotation of sphalerite can be accomplished at …
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Scale-up of column flotation
The parameters controlling column flotation have been investigated using laboratory and pilot-scale flotation cells. It was determined that column recovery is a function of flotation rate constant, axial dispersion, retention time and fractional air hold-up within the cell. Mathematical expressions …
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Multiphase Hydrodynamics in Flotation Systems
Flotation is a complex, multiphase process used to separate minerals. Four problems central to the fundamentals of the flotation process were studied. A multiphase grid turbulence experiment was conducted to verify particle collision models. The slip velocities of solid particles and bubbles were …
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Investigating the effect of energy dissipation on flotation kinetics in an oscillating grid flotation cell
… the effect of energy dissipation on the flotation kinetics of quartz in an oscillating grid flotation cell. Oscillating grids exhibit relatively isotropic and homogeneous turbulence, which cannot be achieved in standard impeller agitated flotation cells. Due to this they provide a …
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Modelling of the mixing characteristics and flotation kinetics of the collection zone in flotation columns
Column flotation has gained worldwide acceptance in the minerals processing industry in the past decade. This has been due the operating characteristics of flotation columns which can produce improved grades and recoveries over conventional cells. Added to this, flotation columns are both simple to …
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Bubble Size Effects in Coal Flotation and Phosphate Reverse Flotation using a Pico-nano Bubble Generator
Froth flotation is widely used in minerals industry. However, it is effective in a narrow size range, nominally 45--250 mum for coal and 10--150 mum for minerals. And the flotation performance of coal and minerals beyond this size range is not quite satisfactory. It is now recognized that the …
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The development of a flotation simulation methodology towards an optimisation study of UG2 platinum flotation circuits
The design of new flotation plants is still based substantially on experience obtained from prior plant designs. Design criteria are typically based on rule of thumb procedures that often prove to be highly ineffective. The development of appropriate models of the flotation process is a means of …
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Surface chemical aspects of microbubble flotation
… order to demonstrate the ability of microbubble flotation to superclean coal to ash levels of less than 2%, several Eastern U. S. coals have been tested. The results show that the process is capable of producing superclean coal with improved recovery as compared to the conventional flotation …
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Flotation characteristics of certain oxide lead minerals
Includes bibliographical references.
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Investigation of the flotation of chromite, An
Includes bibliographical references (pages 31-32).
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