Reagents For Enhanced Coal Flotation 4625

  • P. Somasundaran,* Namita Deo,* and K.A. Natarajant

    Traditional flotation reagents are known to increase the flotation recovery of coal, total sulfur content, and total ash content. In contrast, bacterial conditioning produces no effect on coal flotation but decreases the total sulfur content (Botang, 1997). . Biomass can act as a flotation reagent for the beneficiation of nonsulfide minerals ...

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  • (PDF) Coal and Potash Flotation Enhancement using a Clay ...

    Flotation results show that the use of GP reagents significantly enhanced flotation efficiency under. ... Researchers have tested this chemical in coal flotation (Tao et al. 2007), phosphate ...

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  • Flotation Reagents - Mineral Processing & Metallurgy

    CAVITATION NANOBUBBLE ENHANCED FLOTATION PROCESS FOR MORE EFFICIENT COAL RECOVERY Froth flotation is a widely used, cost effective particle separation process. However, its high performance is limited to a narrow particle size range, e.g., between 50 µm and 600 µm for coal and between 10 µm and 100 µm for minerals.

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  • The Effect of Hydrothermal Treatment on Structure and ...

    Particles, flotation reagents, and air bubbles are highly dispersed and interact with each other in a flotation cell. Therefore, a basic understanding on the fundamental mechanism of the above interactions involved in a low-rank coal flotation system is the prerequisite for improving low-rank coal flotation …

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  • Mining Chemicals - International Mining

    Mining chemicals represent a niche area of supply but at the same time their use is almost universal across the industry. In this month’s im-mining.com Spotlight Feature Article, from the June issue of International Mining magazine, Editor Paul Moore looks at …

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  • gold flotation collectors - Telecom Southern

    gold flotation enhanced . ... Reagent Flotation Flotation reagent is the most important thing in a flotation process in which this reagent is needed for removal of mineral concentrates that will be done There are three principal types of flotation reagents collectors regulating agents and frothing agents ... coal pulvariser plant mfg companies ...

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  • Coal and Potash Flotation Enhancement using a Clay Binder ...

    Mechanical flotation tests were carried out using coal and potash samples. Process parameters investigated included slurry solids percentage, impeller rotation speed, binder dosage, etc. Flotation results show that the use of GP reagents significantly enhanced flotation efficiency under …

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  • EMULSIFIED REAGENT MIXTURE’S EFFECTS ON COAL FLOTATION …

    Abstract. A series of tests were conducted with different reagent mixtures already containing collector, frother and polymer. Then 2% emulsifier was added to examine its effects on the overall efficiency of coal flotation process in general and ash, yield, recovery and the rate of flotation …

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  • Minerals Engineering International Online - Reagents ...

    The low-potential hydrophobic state of pyrite in amyl xanthate flotation with nitrogen. International Journal of Mineral Processing , vol.67 -4, 2002 Morris, G.E., Fornasiero, D., and ralston, J., Polymer depressants at the talc-water interface: adsorption isotherm, microflotation and electrokinetic studies.

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  • Chemical Reagents for Enhanced Coal Flotation | Request PDF

    Harris (2002) greatly enhanced the flotation of coal with a small addition of tetrahydrofurfuryl ester (THF) reagent. Tian (2017) found that carboxylic acids, alcohols, ketones and aldehydes can ...

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  • Mining - Surfactants | Nouryon

    Sulfur-based products like NaSH are widely used in mining applications as an efficient copper depressor and sulfidizing agent promoting enhanced performance in sulfide flotation. Synthetic polymers. Synthetic polymers are useful for a variety of mining applications, …

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  • Conditioner for flotation of coal - The Dow Chemical Company

    Further, the DEA/TOFA conditioner in Run A exhibits both enhanced coal recovery and less ash co-flotation than the prior art fatty amine utilized in Run E. EXAMPLE 2. A series of substantially identical flotation runs are performed in the same manner as Example 1, with the exception of minor differences disclosed hereinafter.

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  • The effect of chemical reagents on lignite flotation - CORE

    The phenomenon of reverse flotation was observed through the whole work. Within the range studied, the optimum particle size was −300+75 μm, the pulp density was 15% and the froth dosage was 0.4 g/kg coal. The use of kerosene alone as a collector neither improved the total recovery nor enhanced …

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  • Optimization of Coal Washery Tailings by Flotation Process

    Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal.

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  • Reagent collector for flotation of coal

    For carrying out the process take 0.75 kg apolar reagent in the form of an emulsion in water and mixed with a slurry containing 150 g/l of coal sludge, and reagent-expander KATHOL (150 g per 1 ton of coal sludge) within 2-3 minutes After contact of coal particles with reagents in the flotation pulp is served in the air and within 1 min ...

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  • US3807557A - Flotation of pyrite from coal - Google Patents

    Pyrite is removed from coal by means of a two-stage froth flotation process. In the first stage, coarse pyrite is removed as underflow in a conventional froth flotation operation. In the second stage, the froth product from the first stage is subjected to froth flotation using a coal flotation depressant and a pyrite flotation collector, thereby removing a substantial proportion of fine pyrite.

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  • US Patent for Frothers demonstrating enhanced recovery of ...

    The major coal tested is a bituminous Pittsburgh Seam coal which is slightly oxidized, which is a good test coal for reagent evaluation and comparisons, as it exhibits very typical (average) coal flotation characteristics. The coal, as received, is passed through a jaw crusher and then screened through a …

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  • Chemical Reagents for Enhanced Coal Flotation: Coal Preparation: …

    Apr 21, 2014· More important was the performance of these compounds as promoters for oxidized coal flotation. Finally, joint collector flotation experiments were conducted, and the results showed that a very small addition of a THF reagent before the dodecane addition greatly enhances the flotation of coal.

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  • Control of clay minerals effect in flotation. A review

    the fine coal flotation process [14]. According to the results a clean coal product of 8-8.5% ash was produced from a feed of more than 19% ash with 97-98% combustible recovery. Binders significantly enhanced flotation selectivity, reducing clean coal ash from 8-8.5% to 7-7.5%. Also, flotation

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  • Fundamental properties of flotation frothers and their ...

    In the present work, five different flotation frothers were tested in order to evaluate their performance in the flotation of two coal samples in terms of their effect on the entrainment of fine particles. The experimental program included the characterization of the investigated frothers by means of surface tension measurements, dynamic foamability index (DFI), critical coalescence ...

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  • The effect of chemical reagents on lignite flotation - CORE

    The phenomenon of reverse flotation was observed through the whole work. Within the range studied, the optimum particle size was −300+75 μm, the pulp density was 15% and the froth dosage was 0.4 g/kg coal. The use of kerosene alone as a collector neither improved the total recovery nor enhanced the selectivity.

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  • Flotation behaviour of weathered coal in mechanical and ...

    Sep 01, 2013· The low rank or oxidized coals show unpleasant flotation behaviour. The non-coking coal from Talcher, containing 26.8% ash, 4.9% moisture, 35.7% volatile matter and 1% oxygen was used for the investigation. The flotation performance of the weathered coal in a mechanical and column flotation cell was compared at low ash level of about 12%.

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  • Mining - Surfactants | Nouryon

    Sulfur-based products like NaSH are widely used in mining applications as an efficient copper depressor and sulfidizing agent promoting enhanced performance in sulfide flotation. Synthetic polymers. Synthetic polymers are useful for a variety of mining applications, including dispersion, flocculation and coagulation.

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  • Performance Mining Reagents - SNF Holding Company

    units for specialty mining reagents, FloMin, Inc. is well positioned to service all of your mining reagent needs. ... Certain product mixtures are particularly useful as flotation reagents; specifically collectors in the flotation of molybdenum-bearing copper ores, where molybdenum ... and enhanced oil recovery, while respecting the environment ...

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  • REAGENTS OF BIOLOGICAL ORIGIN IN MEfALLURGY

    reduced drastically, even when the flotation was carried out after conditioning with the flotation reagents (Yelloji Rao et ai, 1992b). In the case of galena also, natural floatability was enhanced appreciably upon pretreatment with sulfuric acid solution (F"tgure 3) (Yelloji Rao et al, 1992b).

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  • US5443158A - Coal flotation process - Google Patents

    A process for the flotation of particles of lignitic coal, subbituminous coal or oxidized bituminous coal contained within a slurry of coal and gangue, comprising the steps of dispersing a surfactant throughout the slurry, first conditioning the slurry such that the surfaces of the particles of coal are selectively coated by the surfactant to produce activated particles of coal, dispersing an ...

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  • Flotation promoters improve fine coal recovery (Journal ...

    Froth flotation is widely used in the coal industry to clean -28 mesh fine coal. A successful recovery of particles by flotation depends on efficient particle-bubble collision and attachment with minimal subsequent particle detachment from bubble. Flotation is effective in a narrow size range beyond which the flotation efficiency drops drastically.

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  • Control strategies for flotation circuits - Rhosonics

    Flotation is known as a complex process that is affected by a lot of factors. These factors may be related to the circuit design and how the flotation plant is operated. Different process variables are affecting the circuit performance, for example the particle size, slurry density, flow rates, level, pH/added reagents …

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  • Role of Surfactants in Mineral Processing: An Overview ...

    Nov 10, 2018· Research is geared at (a) developing alternate cheaper reagents with similar performances as hydroxamates, (b) modifying the structure of fatty acids for similar or better results than hydroxamates, (c) application of other chelating agents for enhanced flotation response, (d) successfully using flotation of silicated ores and other minerals ...

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  • CAVITATION PICOBUBBLE ENHANCED FLOTATION …

    improved flotation recovery of difficult-to-float coal particles and reduced reagent cost, which is often the largest single operating cost in commercial coal washing plants. Application of this process to coal flotation resulted in an increase in the overall flotation yield of up to 20% or higher, a collector dose

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  • US Patent for Frothers demonstrating enhanced recovery of ...

    The major coal tested is a bituminous Pittsburgh Seam coal which is slightly oxidized, which is a good test coal for reagent evaluation and comparisons, as it exhibits very typical (average) coal flotation characteristics. The coal, as received, is passed through a jaw crusher and then screened through a 25 mesh sieve.

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  • EMULSIFIED REAGENT MIXTURE’S EFFECTS ON COAL FLOTATION …

    Abstract. A series of tests were conducted with different reagent mixtures already containing collector, frother and polymer. Then 2% emulsifier was added to examine its effects on the overall efficiency of coal flotation process in general and ash, yield, recovery and the rate of flotation in particular.

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  • APPLICATION of SPECIAL collectorS and flotation column …

    promote low rank coal flotation for industrialization. The flotation reagents, especially collectors, usually play an important role in the flotation of either low rank coal or oxidized coal. In previous research, non-conventional reagents have been found very effective in the flotation of low rank coal.

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  • Picobubble enhanced fine coal flotation (Journal Article ...

    @article{osti_20847715, title = {Picobubble enhanced fine coal flotation}, author = {Tao, Y J and Liu, J T and Yu, S and Tao, D}, abstractNote = {Froth flotation is widely used in the coal industry to clean -28 mesh fine coal. A successful recovery of particles by flotation depends on efficient particle-bubble collision and attachment with minimal subsequent particle detachment …

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  • Chemicals - Mining Prospectus

    Successful flotation operational results require continual adjustment to changing conditions. Often key to achieving optimum metallurgy is the flotation reagent suite employed. In order to achieve optimum flotation performance, reagents must be managed insofar as dosage, application point and even type.

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  • FROTH FLOTATION STUDIES ON DE-ASHING OF NON …

    In coal flotation the collector and the frother are oily reagents which are insoluble in aqueous medium. So normally the dispersion of such oily reagents by a conventional flotation machine is not adequate which may lead to non-selective adsorption and reversible and non-equilibrium conditions. In …

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  • NIOSHTIC-2 Publications Search - 10007794 - Flotation ...

    The Bureau of Mines conducted an investigation to improve the flotation response of coals that are difficult to wash by froth flotation. A literature survey and experimentation showed that, for the most part, refractory coals can be floated with oily collectors and frothers. Collector reagent consumption can be minimized and the selectivity of the flotation enhanced by assuring adequate, but not

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  • Handbook of Flotation Reagents - MESA

    12.3 Flotation Properties of Individual Copper Minerals and Associated Sulfides ..... 240 12.4 Flotation Practice in Beneficiation of Copper and Copper-Molybdenum Ores ..... 244 12.4.1 Effect of grinding on metallurgy ..... 245 12.4.2 Reagent schemes in flotation of porphyry copper and

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  • NIOSHTIC-2 Publications Search - 10007794 - Flotation ...

    The Bureau of Mines conducted an investigation to improve the flotation response of coals that are difficult to wash by froth flotation. A literature survey and experimentation showed that, for the most part, refractory coals can be floated with oily collectors and frothers. Collector reagent consumption can be minimized and the selectivity of the flotation enhanced by assuring …

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  • Coal Flotation Chemistry - SlideShare

    Nov 18, 2016· Xu et al (2003) have investigated the effect of a number of clays on coal flotation. Figure 3 shows the effect of montmorillonite clays on coal flotation under acid and alkaline conditions. Fig. 3. The Effect of Clays on Coal Combustibles Recovery at pH 5 (left) and pH 10 (right) (Xu et al, 2003).

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