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  • coal flotation ions hoevedijkzicht

    It is of noticing that the pH is an important factor in coal flotation, where the ions OH−and H+affect the...

  • Physical and chemical interactions in coal flotation

    29/09/2003· Coal flotation is a complex process involving several phases (particles, oil droplets and air bubbles). These phases simultaneously interact with each other and with other species such as the molecules of a promoting reagent and dissolved ions in water. The physical and chemical interactions determine the outcome of the flotation process.

  • Regulation of coal flotation by the cations in the

    01/07/2020· The concomitant clay minerals in coal commonly have adverse effects on the coal flotation. In this work, the regulation of coal flotation by cations (Na + and K +) in the presence of clay was investigated to abate this deterioration.It was observed by SEM-EDS that the clay particles coating on the coal surface in low pH condition, which significantly reduced the hydrophobicity of coal.

  • The Effect of Multivalent Ions on the Flotation of Coal

    Abstrect Flotation of coal generally exhibits a maximum around neutral pH. This maximum. despite the marked mineralogical heterogeneity. has been attributed to the isoelcctric point of the coal in this pH region. The results obtained in this study demonstrate the important role of multivalent ions in determining the pH dependence of flotation.

  • The effect of calcium ions on coal flotation

    Download Citation The effect of calcium ions on coal flotation Laboratory and field experiments were carried out to study the effect of calcium ions on coal flotation. Tap water and recycled

  • (PDF) The Effect of Multivalent Ions on the Flotation of Coal

    Flotation of coal generally exhibits a maximum around neutral pH. This maximum, despite the marked mineralogical heterogeneity, has been attributed to the isoelectric point of the coal in this pH...

  • The Effect of Multivalent Ions on the Flotation of Coal

    Flotation of coal generally exhibits a maximum around neutral pH. This maximum, despite the marked mineralogical heterogeneity, has been attributed to the isoelectric point of the coal in this pH region. The results obtained in this study demonstrate the important role of multivalent ions in determining the pH dependence of flotation. Ca, Fe, and Al electrolytes are found to depress coal in

  • (PDF) The Effect of Multivalent Ions on the Flotation of Coal

    Flotation of coal generally exhibits a maximum around neutral pH. This maximum, despite the marked mineralogical heterogeneity, has been attributed to the isoelectric point of the coal in this pH...

  • The effect of calcium ions on coal flotation

    Download Citation The effect of calcium ions on coal flotation Laboratory and field experiments were carried out to study the effect of calcium ions on coal flotation. Tap water and recycled

  • flotation coal ions breughelsausages

    Sep 29, 2003· Coal flotation is a complex process involving several phases (particles, oil droplets and air bubbles). These phases simultaneously interact with each other and with other species such as the molecules of a promoting reagent and dissolved ions in water. The physical and chemical interactions determine the outcome of the flotation process. read more. 08 Dec, 2019. Improved

  • Pyrite depression during coal flotation Part I — Inorganic

    This investigation is an exploratory study to evaluate a large number of potential pyrite depressants for use during coal flotation. Subsequently, the more promising reagents can be evaluated in detail. Several reagent categories (such as alkalis, lime, oxidizing agents, reducing agents, specific inorganic ions and dispersants) that were found to be effective pyrite depressants are discussed here.

  • SPECIFIC ION EFFECT OF CHLORIDE SALTS ON COLLECTORLESS

    Key words: flotation, coal, salt, froth stability, ion-specific effect . Introduction . High salt concentration has a significant effect on bulk and interfacial water structure, and colloidal interactions between bubbles and particles hence affect flotation of minerals. There are several studies in the literature indicating that dissolved ions in flotation system have a significant effect on

  • COAL FLOTATION Mineral Processing & Metallurgy

    Coal Flotation with Non-Ionic Surfactants In coal flotation, the most commonly used collectors are oily materials collectors such as diesel oil and kerosene. For higher rank coals, the reagent consumption in flotation is low because of the high natural hydrophobicity of the coal.

  • Improved flotation of heat treated lignite with saline

    of studies in the literature indicating that dissolved ions in flotation pulps induce important effects on the flotation of minerals such as potash, trona, and borax (soluble minerals) in brine solutions (Ozdemir, 2013). These studies have advanced some mechanisms to explain flotation of coal and other minerals in

  • DESIGN AND PERFORMANCE ASPECTS OF COAL FLOTATION

    In coal flotation, fine bubbles also improve separation as they intensify the difference in the kinetics of the coal from non-coal particles, thus allowing concentrates with lower ash content to be produced without loss in yield. (a) (b) Figure 2: Rate constant as a function of particles size, for three bubble sizes at constant J g of 1.53 cm/s: (a) Silica and (b) Pyrite (from Diaz-Penafiel

  • EFFECT OF OXIDATION ON FLOTATION AND ELECTROKINETIC

    Coal flotation test were conducted with a 1 l single-chamber laboratory flotation machine type 136FL using 100 g mixture of coal, coal-pyrite and alumo-silicate minerals in ratio 63:15:22 at a pulp density of 10 % solids at the pH iep of coal. In each flotation test, the pulp was first agitated n the flotation cell at 1900 rpm and room temperature for 3 min. Then, the following reagents were