Results 181 to 190 of about 364,250 (225)
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Powder Technology, 2019
Abstract In this study, X-ray Photoelectron Spectroscopy (XPS) was used to analyze the elements on the surface of subbituminous coal, and reverse flotation was introduced to float subbituminous coal. The effect of ultra-fine coal on the flotation behavior of silica in coal reverse flotation was discussed by comparing the flotation performance with ...
Yonggai Li +6 more
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Abstract In this study, X-ray Photoelectron Spectroscopy (XPS) was used to analyze the elements on the surface of subbituminous coal, and reverse flotation was introduced to float subbituminous coal. The effect of ultra-fine coal on the flotation behavior of silica in coal reverse flotation was discussed by comparing the flotation performance with ...
Yonggai Li +6 more
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Effect of Preconditioning on the Flotation of Coal
Chemical Engineering Communications, 2005ABSTRACT Two preconditioning methods, namely, ultrasonication and high-intensity conditioning in an agitated vessel, were compared as a means for improving the flotation of oxidized coal. The use of preconditioning by ultrasound or high-intensity conditioning significantly improved the flotation of the oxidized coal in batch-type laboratory tests ...
Feng, D., Aldrich, Chris
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An evaluation of the flotation response of coals
International Journal of Mineral Processing, 1989Abstract The general criteria which must be satisfied by any procedure intended to characterise the fundamental response of a coal to flotation are reviewed. Of the procedures currently advocated, only two, release analysis and the “tree” procedure, satisfy all these criteria.
Stephen J. Pratten +2 more
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Effect of flotation reagent adsorption by different ultra-fine coal particles on coal flotation
International Journal of Mineral Processing, 2015Abstract The impact of ultra-fine coal particles on the flotation of coarse coal particles is investigated in this work. Flotation experiments of three coal samples were conducted. The results showed that the recovery of coarse coal particles (> 74 μm) decreases when low-ash ultra-fine coal particles are added into coal samples, whereas the addition ...
Yaoli Peng +4 more
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Flotation characteristics of oxidized coal
Fuel and Energy Abstracts, 1995Abstract The floatability of oxidized coal was investigated by means of electrokinetic studies, contact angle measurements and flotation tests. Electrokinetic measurements showed that the zeta potential of unoxidized and oxidized coal samples depends on pH.
Musa Sarikaya, Gülhan Özbayoǧlu
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Kinetics and mechanism of coal flotation
Colloid & Polymer Science, 2002The flotation kinetics of coarse coal particles was studied in a modified version of the Hallimond tube at 25 °C using nitrogen as the carrier gas, in the pH range 2–12. The kinetics was followed by measuring the volume of the particles accumulated in the collector tube as a function of time.
Eduardo Humeres, N.A. Debacher
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Advances in coal flotation technology
2007Poor results are generally achieved in the treatment of coal slimes using conventional methods. Since fine size fractions below 0.5 mm can together represent a significant portion of the plant’s feed, the development of suitable technologies for an efficient recovery of their fuel content can add a considerable contribution to the economic balance of ...
TILOCCA, MARIA CATERINA +2 more
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Application of column flotation of coal
2005The article discusses application of column flotation for flotation of coal.
Fečko, Peter +3 more
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Comparison of Flotation Column and Mechanical Cell in Coal Flotation
2004Flotation is universal method to fine coal processing. Selectivity and efficiency of flotation depends not only on surface characteristics of particles, but also on hydrodynamic condition in flotation cell. The goal of the research was to compare flotation column and conventional mechanical flotation cell in coal flotation. The tests was carried out in
Sobota, Ivan +2 more
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Column flotation of Coal Slurries
2006Paper is concerning floatability of coal slurries by means of different flotation collectors. The goal of the work was verification of floatability of coal slurries as well as flotation collectors selectivity. The investigation was carried out in a column flotation.
Fečko, Peter +3 more
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