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Showing 1 to 11 of 11 for “"flotation model"”.
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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 of a turbulent flotation model from first principles
Flotation is a process of separating particulate materials of different surface properties in a hydrodynamic environment, and is used extensively for separating different minerals from each other in the mining industry. In this process, air bubbles are introduced at the bottom of a particulate …
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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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A predictive flotation model based on adsorption, contact angle, coagulation, and solution chemistry in the alkylamine-quartz flotation system
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1984.
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Model-based Computer Simulation of Froth Flotation
Froth flotation is a separation process by which particles are selectively attached to air bubbles. It is one of the most dynamically complex industrial processes in use today. This complexity has steered research towards understanding the fundamental principles of the process. Relatively few …
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Development of a Flotation Rate Equation from First Principles under Turbulent Flow Conditions
A flotation model has been proposed that is applicable in a turbulent environment. It is the first turbulent model that takes into account hydrodynamics of the flotation cell as well as all relevant surface forces (van der Waals, electrostatic, and hydrophobic) by use of the Extended DLVO theory. …
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Modeling Flotation from First Principles Using the Hydrophobic Force as a Kinetic Parameter
Flotation is regarded as the best available separation method for the recovery of valuable minerals such as chalcopyrite (CuFeS2), sphalerite (ZnS), etc., from mined ores. Practically all metals humans use today are produced by flotation. The process relies on controlling the stability of the thin …
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Evaluation of column flotation circuits for fine coal cleaning
… that may be used to improve the column flotation of micronized coal. Laboratory flotation tests were performed with two different samples of Pittsburgh No. 8 seam coal. The first coal, Coal A, was ground to two different particle sizes and subjected to both column and conventional …
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Analytical and Numerical Techniques for the Optimal Design of Mineral Separation Circuits
… Second, this work presents a four-reactor flotation model which considers both process kinetics and machine carrying capacity. The simulator is suitable for scaling laboratory data to predict full-scale performance. By first using circuit analysis to reduce the number of design …
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Application of Extended DLVO Theory: Modeling of Flotation and Hydrophobicity of Dodecane
The extended DLVO theory was used to develop a flotation model by considering both hydrodynamic and surface forces involved in the process. A stream function was used to estimate the kinetic energies for thinning the water films between bubbles and particles, which were compared with the energy …
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Particles and Bubbles Collisions Frequency in Homogeneous Turbulence and Applications to Minerals Flotation Machines
… is a fundamental quantity that is needed for modeling multiphase flows with applications to chemical processes, minerals flotation, food science, and many other industries. In this dissertation, numerical simulations are performed to determine collisions frequency of bi-dispersed particles …