• Method for the froth flotation of coal (Patent)

    Method for the froth flotation of coal (Patent)

    This patent describes a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed particles as an aqueous phase in the presence of a coal particle collector and an alcohol frother

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  • US4770767A - Method for the froth flotation of coal

    US4770767A - Method for the froth flotation of coal

    The froth flotation of coal is conducted in the presence of a conditioner of an oxygen containing compound of the formula: R.sub.1 --O--R.sub.2).sub.n (I) wherein R 1 and each R 2 are independently

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  • US8875898B2 - Method for the froth flotation of coal

    US8875898B2 - Method for the froth flotation of coal

    The present invention relates to the beneficiation of coal by the process of froth flotation and specifically relates to a process for the froth flotation of coal using a collector consisting

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  • Coal Flotation - an overview | ScienceDirect Topics

    Coal Flotation - an overview | ScienceDirect Topics

    10 rows The purpose of the frother is to produce a sizable amount of small air bubbles, thus increasing the

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  • Coal Froth Flotation: Effects of Reagent Adsorption on the

    Coal Froth Flotation: Effects of Reagent Adsorption on the

    Apr 28, 2006 The froth flotation of the coal used was performed in the presence of two nonionic surfactants, Triton x-100 (poly(ethylene glycol) tert-octylphenyl ether) and MIBC (methyl isobutyl carbinol), and an anionic surfactant, SDS (sodium dodecyl sulfate). The results showed that the adsorption of a high amount of reagent on the particles decreased

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  • Froth flotation process of coal washing

    Froth flotation process of coal washing

    Froth flotation process of coal washing Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Froth flotation process of coal washing, quarry, aggregate, and different kinds of minerals

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  • Floatation of ultrafine coal - Froth Flotation (Sulphide

    Floatation of ultrafine coal - Froth Flotation (Sulphide

    Froth Flotation (Sulphide & Oxide) ... People used to float -0.5mm coal in flotation cells in 1960s,70s and 80s, but now they have switched to -0.25mm flotation. It is recommended that maximum size particle that you try to float be 0.3mm. The reason is that 0.5mmx0.25mm flotation requires more residence time than 0.25mmx0 flotation

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  • WASHABILITY AND FROTH FLOTATION TESTS OF LAFIA

    WASHABILITY AND FROTH FLOTATION TESTS OF LAFIA

    Froth flotation at Ph7 of the coal gave an average ash content of the total float to be 6.64% with the higher ash content reporting in the first float being10.29%. The sulphur, moisture and volatile matter are same as in the raw coal. Froth flotation at Ph9 of the coal gave an average ash content

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  • Method for the froth flotation of coal - The Dow Chemical

    Method for the froth flotation of coal - The Dow Chemical

    The froth flotation of coal is conducted in the presence of a conditioner of an oxygen containing compound of the formula: R 1--O--R 2) n (I). wherein R 1 and each R 2 are independently saturated hydrocarbyls and n is from 1 to about 3

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  • On-line analysis of froth surface in coal and mineral

    On-line analysis of froth surface in coal and mineral

    Mar 01, 2002 1.Introduction. Process operators and flotation researchers have long known that the performance of the flotation process is reflected in the structure of the froth phase Pryor, 1965, Glembotskii, 1972, Cutting et al., 1986, McKee, 1990.Consequently, experienced flotation plant operators usually develop ‘calibrated eye-balls’ which allow them to categorise froths mentally into a

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  • Effect of microemulsified collector on froth flotation of

    Effect of microemulsified collector on froth flotation of

    Froth flotation is a fine particle separation process, based on the difference in surface hydrophobicity of different components. It is often very effective for coal cleaning, since coal is naturally hydrophobic and minerals are generally hydrophilic. Because of coal’s hydrophobicity, froth flotation has employed mostly non-polar

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  • CAVITATION NANOBUBBLE ENHANCED FLOTATION

    CAVITATION NANOBUBBLE ENHANCED FLOTATION

    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 m and 600 m for coal and between 10 m and 100 m for minerals. Outside this range, the

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  • Lab Froth Flotation Testing Guide with Coal Quality - ACARP

    Lab Froth Flotation Testing Guide with Coal Quality - ACARP

    Coal quality parameters evaluated were mean maximum vitrinite reflectance (coal rank) and ash value of the froth flotation size tested - the latter being referred to throughout this report as the 'raw froth size ash'. Froth flotation data sets were collated, and accumulated froth flotation data sets reviewed. Charts were created and outcomes

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  • TECHNICAL REPORT 3 2 5 1997 A MODIFIED RELEASE

    TECHNICAL REPORT 3 2 5 1997 A MODIFIED RELEASE

    modern flotation technologies and strategies being used today by coal preparation plant operators and researchers. Thus, a true optimum theoretical separation performance for any froth flotation process could be obtained for fine coal characterization. During this reporting period, a modified coal flotation characterization procedure, termed

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  • Characterizing Coal Flotation Performance Using Release

    Characterizing Coal Flotation Performance Using Release

    Feb 27, 2007 Characterizing Coal Flotation Performance Using Release Analysis. Unlike dense media separation, froth flotation has no widely accepted counterpart to float-sink analysis for characterizing process performance. However, release analysis, developed by C.C. Dell in 1953, could serve as this counterpart by providing a measure of the state of

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  • FLOTATION OF PYRITE FROM COAL - SECRETARY OF THE

    FLOTATION OF PYRITE FROM COAL - SECRETARY OF THE

    The froth product from this first step of the process is then repulped with fresh water and froth flotation, using a coal flotation depressant and a pyrite flotation collector, is employed to float a substantial portion of the remaining fine-size pyrite, while removing the coal product as underflow

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  • Process for recovery of fine coal (Patent)

    Process for recovery of fine coal (Patent)

    Disclosed is an improved process wherein coal particles are beneficiated by froth flotation under coal froth flotation conditions to separate the desired coal particles from remaining unwanted ash and like gangue material. The improvement of the present invention comprises conducting the froth flotation in the presence of an ester-alcohol

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  • A MODIFIED RELEASE ANALYSIS PROCEDURE USING

    A MODIFIED RELEASE ANALYSIS PROCEDURE USING

    Sep 01, 1995 occurring in the froth zone due to bubble coalescence was included in the model. Both selective and non-selective particle detachment was considered. The feed components used in the model were obtained from a washability analysis of a fine Illinois No. 5 seam coal sample. Flotation kinetic values were obtained for each density fraction from a

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