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Showing 1 to 12 of 12 for “"Flotation kinetics"”.
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The effect of energy input on flotation kinetics
SYNOPSIS Energy/power input in a flotation cell is an important parameter which, if optimised, can increase the flotation rate. The optimum energy/power input within a flotation cell is still a matter of conjecture and there is a need for a better understanding of the effect of energy input on …
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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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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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Laboratory-Scale Analysis of Energy-Efficient Froth Flotation Rotor Design
Froth Flotation is an industrial separation process commonly used in the primary enrichment of run-of-mine mineral material. Over the past 100 years, much of the process's development has come from empirical evolution, rather than fundamental understanding. While many of the governing sub-processes …
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Flotation in a novel oscillatory baffled column
… of an Oscillatory Baffled Column as a novel flotation device and as a research tool for investigating the role which hydrodynamics play in promoting particle-bubble contacting. The cell differs from a conventional cell design in that bubble generation is decoupled from the power input. This …
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Fine-grinding Characterisation of PGM Ore Using HIGmill
… were also produced for the milling results. Flotation tests were then carried out on the HIG 5 products to assess the downstream response of the HIGmill. The milling results showed that the optimal tip speed was 600 rpm. The optimal solids concentration for the UG2 ore was 60%. For the feed …
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Surface Forces in Thin Liquid Films of H-Bonding Liquids Confined between Hydrophobic Surfaces
… and a variety of industrial processes such as flotation. While the mechanisms of hydrophobic interactions at molecular scale, as in self-assembly and micellization, is relatively well understood, the mechanisms of macroscopic hydrophobic interactions have been controversial. It is, therefore, …
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Validation and Application of a First Principle Flotation Model
A first principle flotation model has been derived from the basic mechanisms involved in the bubble-particle and bubble-bubble interactions occurring in flotation. It is a kinetic model based on the premise that the energy barrier (E1) for bubble-particle interaction can be reduced by increasing …
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Development and Validation of a Simulator based on a First-Principle Flotation Model
A first-principle flotation model was derived at Virginia Tech from the basic mechanisms involved in the bubble-particle and bubble-bubble interactions occurring in a flotation cell (Yoon and Mao, 1996; Sherrell and Yoon, 2005; Do, H, 2010). The model consists of a series of analytical equations …
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Considering the Action of Degrading Water Quality on the Electrochemical Response of Sulphide Minerals
… of transportation during mining operations. Flotation, in particular, is a water intensive process where water makes up about 80- 85% of the pulp phase. Process water contains organic and inorganic species which accumulate as they are recycled. To avoid the treatment costs of removing these …
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An investigation into the effects of pulp chemistry under wet and dry grinding on the flotation response of pyrite
… and selectivity of most sulphide minerals in the flotation process. Floatability of ores is mostly determined by surface properties and the surface properties are essentially controlled by the grinding conditions. The flotation response of sulphide minerals is influenced by factors such as: …