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Modelling of entrainment in industrial flotation cells

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  • Modelling of entrainment in industrial flotation cells
    Modelling of entrainment in industrial flotation cells

    Entrainment in flotation can be considered as a two-step process, including the transfer of the suspended solids in the top of the pulp region just below the pulp-froth interface to the froth phase and the transfer of the entrained particles in the froth phase to the concentrate. Both steps have a strong classification characteristic. The degree of entrainment describes the classification

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  • A Review of the Entrainment Mechanism and its Modelling
    A Review of the Entrainment Mechanism and its Modelling

    This paper reviews the developments in understanding of the entrainment mechanism and its modelling in industrial flotation processes over the last 30 years. Both valuable and gangue minerals in the pulp zone of an industrial flotation machine can be transported through the froth zone to the concentrate launder in the water which must also be transferred from the pulp

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  • Hydrodynamic Characterization of Industrial Flotation
    Hydrodynamic Characterization of Industrial Flotation

    Direct measurement of gangue entrainment. Industrial flotation cell scanning with gamma ray. Pulp flowrate distribution in parallel flotation banks. Flotation rate distribution. 1.2 Relevance to industrial flotation machines Industrial flotation cells need to accomplish several functions such as: air bubble

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  • COLUMN FLOTATION MODELLING AND TECHNOLOGY
    COLUMN FLOTATION MODELLING AND TECHNOLOGY

    An inherent limitation with the flotation of fine partcles in conventional cells is recovery of hydrophilic (gangue) particles by mechanical entrainment in the water reporting to the froth. The method of minimizing entrainment is to create a 5-3Ocm thick froth at the slurry surface. The froth permits the gangue to drain back to the pulp while

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  • INDUSTRIAL FLOTATION PROCESS MODELLING: RTD
    INDUSTRIAL FLOTATION PROCESS MODELLING: RTD

    2.2 RTD Modelling of Industrial Flotation Cells It was found that the liquid RTD can be properly represented by a model of N perfect mixers in series with pure delay, according to the normalized distribution function, 0 50 100 150 200 250 300 0 1000 2000 3000 4000 5000 6000 Time [s]

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  • Entrainment of Fine Particles in Froth Flotation
    Entrainment of Fine Particles in Froth Flotation

    An empirical model for the degree of entrainment in froth flotation based on particle size and density. Minerals Engineering 98, 187–193. Wang, L., Peng, Y., Runge, K., 2017. The mechanism responsible for the effect of frothers on the degree of entrainment in laboratory batch flotation. Minerals Engineering 100, 124–131

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  • Entrainment and true flotation of a natural complex ore
    Entrainment and true flotation of a natural complex ore

    Jun 17, 2015 This study attempts to assess the contribution of entrainment and true flotation in the overall recovery by the laboratory tests performed on a natural complex sulfide ore, provided by la Compagnie Mini re des Guemassa (Morocco), and the effect of two different collectors, Potassium Amyl Xanthate (PAX) and Sodium di-isobutyl di-thiophosphinate

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  • REDESIGN OF INDUSTRIAL COLUMN FLOTATION
    REDESIGN OF INDUSTRIAL COLUMN FLOTATION

    Froth flotation is performed in machines specifically designed for that purpose. There are two basic types of flotation machines and adaptations of these machines. Conventional (mechanical) and column flotation cells are the two types of flotation machines used in flotation (Figure 2)

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  • Up-scaling of froth flotation equipment
    Up-scaling of froth flotation equipment

    pilot and industrial scale flotation tests and a characterization study of large-scale industrial flotation cells in Boliden’s Aitik copper mine in Northern Sweden. The use of high volume flotation cells has nowadays become more and more common to deal with the production of high capacity, low-grade open

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  • [PDF] Entrainment in froth flotation: The degree of
    [PDF] Entrainment in froth flotation: The degree of

    In froth flotation, the degree of entrainment affects the concentrate grade and it is often assumed to be only a function of particle size in models. Literature suggests that other variables might also have a significant impact on the degree of entrainment. In this study, a factorial batch flotation experiment using a mixture of liberated chalcopyrite and two liberated gangue

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  • Modelling of froth transportation in industrial flotation
    Modelling of froth transportation in industrial flotation

    Abstract Mathematical models for froth transportation for the froth and attached particles, including froth velocity profile on the cell surface and residence time distribution of the froth, have been developed for the Outokumpu 50 m3 tank flotation cell used in the primary rougher circuit in the Anglo Platinum Bafokeng–Rasimone Platinum Mine concentrator. The new models take

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  • (PDF) Improving Separation Efficiency in End-of-Life
    (PDF) Improving Separation Efficiency in End-of-Life

    Jan 06, 2022 flotation cell with additional water to reach the ... active particles. Nevertheless, for this industrial black mass, the overall shape of

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  • Investigation of the gas-liquid-particle multi-phase
    Investigation of the gas-liquid-particle multi-phase

    Jan 10, 2022 According to Gorain (2007), the air dispersion created in mechanical flotation cells is characterised by arithmetic mean bubble size between 0.5 mm and 2 mm, gas holdup from 5% to 15%, and gas superficial velocity from 0.6 to 1.5 cm/s. A similar range was found by Vinnett et al (2014) for a range of industrial cells. Frother reagents added to

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  • (PDF) A review of entrainment: Mechanisms, contributing
    (PDF) A review of entrainment: Mechanisms, contributing

    Flotation tests were carried entrainment of hydrophilic particles in a continuous laboratory flo- out by Yianatos and Contreras (2010) in an industrial 130 m3 flota- tation system (flotation products were returned immediately back tion cell in a rougher bank of a copper flotation circuit, and a to the cell by a small peristaltic pump), and

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  • An empirical model for entrainment in industrial flotation
    An empirical model for entrainment in industrial flotation

    Mar 01, 1998 Abstract The entrainment and drainage of particles in a flotation froth have long been recognised as important factors affecting both concentrate grade and recovery. In this paper, an empirical partition curve is proposed that describes the degree of entrainment within a conventional flotation cell. Two empirical parameters are defined: • • entrainment parameter

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  • 10.1016/j.mineng.2004.06.002 | DeepDyve
    10.1016/j.mineng.2004.06.002 | DeepDyve

    Jun 11, 2020 1 Introduction Entrainment is the process by which particles enter the base of a flotation froth and are transferred up and out of the flotation cell suspended in the water between bubbles ( Smith and Warren, 1989 ). Entrainment always occurs in parallel with true flotation and is the primary recovery mechanism for gangue, especially fines

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  • A simple model for the calculation of entrainment in flotation
    A simple model for the calculation of entrainment in flotation

    A new model is proposed for the entrainment based on the water recovery trend. Two sets of timed flotation experiments were carried out to validate the model. These experiments were realized with quartz and pyrite as the only mineral in the pulp and with various frother concentrations and pulp densities. The chemical conditions of the pulp were

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  • SIPS2015 - Modelling The Hydraulic Entrainment
    SIPS2015 - Modelling The Hydraulic Entrainment

    Froth flotation is a mineral separation technique based on differences of the surface characteristics of the several mineral species present. The hydraulic entrainment is a phenomenon that is associated to the flotation process, consisting in the recovery of particles through the interaction between physical parameters as the air flow introduced in the system

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  • Advanced Modelling for Scale-Up of Batch Flotation
    Advanced Modelling for Scale-Up of Batch Flotation

    describes industrial circuit benchmarking and model calibration, followed by validation of the model. The paper finishes with examples of industrial application in several flotation systems. MEASURING THE PULP KINETICS. The traditional approach to flotation scale-up testwork attempts to use . a batch cell to replicate industrial performance

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  • (PDF) Froth recovery of industrial flotation cells
    (PDF) Froth recovery of industrial flotation cells

    While several studies have attempted to model froth recovery in flotation cells [85][86] [87] [88], only a few have focused on the effect of rheology on froth behaviour [89][90][91][92][93

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  • [PDF] Entrainment of fine particles in froth flotation
    [PDF] Entrainment of fine particles in froth flotation

    Entrainment in flotation can be considered as a two-step process, including the transfer of the suspended solids in the top of the pulp region just below the pulp-froth interface to

    Read more +
  • Modelling of Entrainment in Industrial Flotation Cells
    Modelling of Entrainment in Industrial Flotation Cells

    Modelling of Entrainment in Industrial Flotation Cells: Water Recovery and Degree of Entrainment. August 2006; Minerals Engineering 19(11) ... In a mechanical flotation cell, macro hydrodynamics

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  • Particle entrainment model for industrial flotation
    Particle entrainment model for industrial flotation

    Jan 25, 2010 Particle entrainment model for industrial flotation cells 1. Introduction. Froth flotation can be considered a resultant process of two consecutive operations, reaction and... 2. Experimental procedure. Key parameters for gangue recovery estimation are the bubble load grade XB,i (non-selective... 3

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  • An empirical model for entrainment in industrial
    An empirical model for entrainment in industrial

    Mar 01, 1998 In this paper, an empirical partition curve is proposed that describes the degree of entrainment within a conventional flotation cell. Two empirical parameters are defined: • • entrainment parameter (ζ)—the particle size for which the degree of entrainment is 20%. • • drainage parameter (δ)—related to the preferential drainage of coarse particles

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