• the effect of flocculant type on the flocculation of coal

    The Effect of Flocculant Type on the Flocculation of Coal

    The Effect of Flocculant Type on the Flocculation of Coal Slimes. Previous Next View Larger Image; To improve dewatering operations the industry utilizes flocculating agents. These are polyelectrolytes, highly hydrophilic, water-soluble polymers, and since flotation requires collectors that render mineral particles hydrophobic, the use of commercial flocculants is not compatible with flotation

  • evaluation of the effect of hydraulic shear intensity

    Evaluation of the effect of hydraulic shear intensity

    Turbidity reflects the concentration of fine particles suspended in water, which can be used to characterize the completion degree of flocculation. In present work, the high supernatant turbidity indicates that the high proportion of the fine slime particles in the coal-slime water after flocculation, i.e., poor flocculation efficiency.

  • aggregation mechanism of particles: effect of ca2+

    Aggregation Mechanism of Particles: Effect of Ca2+

    Coal slime water (slurry) is the waste-water produced during the wet processing of coal preparations. In the slurry, particles of rock, clay and coal are too small to float or sink [1–3]. It was reported that clay minerals [4], such as montmorillonite, kaolinite and illite [5–8], have a detrimental effect on coal slime dewatering and

  • flocculation of coal particles and coal slimes the dow

    Flocculation of coal particles and coal slimes The Dow

    1989-03-28· Flocculation of coal particles and coal slimes . United States Patent 4816166 . Abstract: An improved process for flocculating and clarifying colloidal coal slurries comprises contacting a coal liquor with a water-soluble, low molecular weight polymer with high anionic character; an inorganic coflocculant; and a water-soluble high molecular weight polymer with low anionic character. The low

  • (pdf) aggregation mechanism of particles: effect of ca2

    (PDF) Aggregation Mechanism of Particles: Effect of Ca2

    Illite is one of the main components in coal slime water and it sometimes makes the water extremely difficult to clarify. In this study, the aggregation mechanism of coal and illite particles was

  • flocculation of coal slimes american cyanamid

    FLOCCULATION OF COAL SLIMES AMERICAN CYANAMID

    1973-02-20· FLOCCULATION OF COAL SLIMES . United States Patent 3717574 . Abstract: Colloidal coal particles in aqueous alkaline medium are flocculated by the combined action of a low molecular weight water-soluble anionic polymer at least 50 mol percent composed of acrylic acid linkages and a high molecular weight anionic polymer at least 95 mol percent composed of acrylamide linkages, and

  • effect of the properties of coal surface and flocculant

    Effect of the properties of coal surface and flocculant

    Three coal samples, selected out of eight with well-characterized surface properties, were used in flocculation tests. A synthetic mixture of coal and silica was used in the selective flocculation experiments. The flocculants tested included: a hydrophilic polyacrylamide (PAM) and a semihydrophobic (F1029-D) flocculants and a totally hydrophobic latex prepared by emulsion polymerization (FR-7A

  • technical note on a laboratory study of the flocculation

    Technical Note on a Laboratory Study of the Flocculation

    A study of flocculation of ultra-fine coal particles by ultrasonic waves was investigated on a laboratory scale. The coal suspension was dilute, with low ionic strength, and at pH 6·2. When a stationary sonic wave is set up in a solution containing suspended coal particles, it

  • us patent for selective flocculation for increased coal

    US Patent for Selective flocculation for increased coal

    The clay is readily washed from the surfaces of the larger coal particles, but a significant quantity of coal values of small particles is present in the clay slimes. Coal values from the clay slimes are conventionally recovered by froth flotation using a frothing agent in conjunction with a hydrocarbon oil. It is estimated that by 1981 over 45

  • the effect of ultra-fine coal on the flotation behavior

    The effect of ultra-fine coal on the flotation behavior

    Ni et al. investigated the effect of slimes on the flotation recovery and kinetics of coal particles using flotation mixtures including slime particles and coal particles within 0.5–0.25 mm, 0.25–0.125 mm and 0.125–0.074 mm size ranges, respectively and found that both the flotation recovery and rate of coal particles decreased with the

  • us patent for selective flocculation for increased coal

    US Patent for Selective flocculation for increased coal

    The clay is readily washed from the surfaces of the larger coal particles, but a significant quantity of coal values of small particles is present in the clay slimes. Coal values from the clay slimes are conventionally recovered by froth flotation using a frothing agent in conjunction with a hydrocarbon oil. It is estimated that by 1981 over 45

  • (pdf) flocculation mechanism of coal preparation plant

    (PDF) Flocculation Mechanism of Coal Preparation Plant

    Flocculation (aggregation) of particles is a vital stage in many solid-liquid separation operations. The process usually involves some form of chemical destabilization and a step in which

  • hydrophobic flocculation applied to fine mineral and coal

    HYDROPHOBIC FLOCCULATION APPLIED TO FINE MINERAL AND COAL

    This paper highlights hydrophobic flocculation applied to fine minerals and coal processing. Initially, hydrophobic flocculation and its separation technology are briefly described. Then, several examples on the application of this technology to the beneficiation of

  • hydrophobic flocculation flotation for beneficiating fine

    Hydrophobic Flocculation Flotation for Beneficiating Fine

    to treat finely ground ores and slimes so as to concentrate coal and mineral values at a fine size range. The process is based on first dispersing the fine particles suspension, followed by flocculation of fine mineral values or coal in the form of hydrophobic surfaces either induced by specifically adsorbed surfactants or from nature at the

  • settling characteristics of coal washery tailings using

    Settling characteristics of coal washery tailings using

    muscovite, quartz, and coal particles. The natural sedimentation rate of these particles present in colloidal and finely divided suspended form is very slow. Flocculation technology is applied in most coal preparation plants to recover water from the tailings of coal washing operations. The flocculation is accomplished through the use of inorganic

  • hydrophobic flocculation flotation for beneficiating fine

    Hydrophobic Flocculation Flotation for Beneficiating Fine

    ABSTRACT It is shown that hydrophobic flocculation flotation (HFF) is an effective process to treat finely ground ores and slimes so as to concentrate coal and mineral values at a fine size range. The process is based on first dispersing the fine particles suspension, followed by flocculation of fine mineral values or coal in the form of hydrophobic surfaces either induced by specifically

  • effect of combined utilization of two additives

    Effect of Combined Utilization of Two Additives

    The present slurry settling effect is poor and the overflow water is turbid,which hamper normal operation of the coal preparation unit.Through analyzing the flocculation principle and comparing the characteristics of the feed coal,three groups of tests with different flocculants were designed.The best dosing system is to add poly aluminum chloride,mix it sufficiently,and then add in 2mL 0.15%

  • dynamic floc characteristics of flocculated coal slime

    Dynamic floc characteristics of flocculated coal slime

    Particle vision and measurement (PVM) images shows that the coagulant dosage influenced either the aggregation of the slime particles or the conformation of the flocculant. If the coagulants were ins...

  • 17th perspective trends in fine coal slimes flotation

    17th Perspective Trends in Fine Coal Slimes Flotation

    ABSTRACT: Fine coal slimes (less than 0-0.2 mm) present great difficulty in cleaning. Their flotation ability depends on their size and physico-chemical characteristics. In particular, the degree of metamorpbism of the coal, and the proportion and ash content of super-fine coal particles (less than 50 pm) produces quite a strong

  • aggregation mechanism of particles: effect of ca2+

    Aggregation Mechanism of Particles: Effect of Ca2+

    Abstract. Illite is one of the main components in coal slime water and it sometimes makes the water extremely difficult to clarify. In this study, the aggregation mechanism of coal and illite particles was investigated using the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory and settling experiments of slime water containing coal and illite.

  • effect of combined utilization of two additives

    Effect of Combined Utilization of Two Additives

    The present slurry settling effect is poor and the overflow water is turbid,which hamper normal operation of the coal preparation unit.Through analyzing the flocculation principle and comparing the characteristics of the feed coal,three groups of tests with different flocculants were designed.The best dosing system is to add poly aluminum chloride,mix it sufficiently,and then add in 2mL 0.15%

  • hydrophobic flocculation flotation for beneficiating fine

    Hydrophobic Flocculation Flotation for Beneficiating Fine

    ABSTRACT It is shown that hydrophobic flocculation flotation (HFF) is an effective process to treat finely ground ores and slimes so as to concentrate coal and mineral values at a fine size range. The process is based on first dispersing the fine particles suspension, followed by flocculation of fine mineral values or coal in the form of hydrophobic surfaces either induced by specifically

  • effect of the properties of coal surface and flocculant

    Effect of the properties of coal surface and flocculant

    Flocculation of coal fines with varying degrees of wettability was studied under well defined hydrodynamic conditions. In this study, three coal samples were tested with three different flocculant types. The results revealed that flocculation depends strongly on both the coal surface properties and the type of flocculant used. A hydrophobic

  • solution of clean water problem of Özberil coal washing

    Solution of Clean Water Problem of Özberil Coal Washing

    effectiveness of the flocculants tested in coal tailing slime suspension was in order: LT27>101 l>LT25>155>Superfloc Flocculation tests done with anionic flocculants, better flocks are obtained with high molecular weight MagnaflocLT27. Also flocculants are bound to surface of particles with electrostatic attraction forces along with polymer

  • analysis of coal slime flocculating velocity--《journal

    Analysis of coal slime flocculating velocity--《Journal

    Analyzed the flocculation process from the standpoint of dynamics, velocity models of cocurrent flocculation and different velocity settling flocculation were established. Moreover, the half-life of decreasing particles in coal slime was calculated according to the models. The results show that flocculating velocity is effected by the flocculation conditions such as the size of particles, the

  • magnetic seeding sedimentation (mss) of coal slimes

    Magnetic seeding sedimentation (MSS) of coal slimes

    Magnetic seeding sedimentation (MSS), i.e. adding magnetic seeds and pre-magnetization for sedimentation, is a technique especially for sedimentation of fine slimes, improving the sedimentation performance by introducing the magnetic interactions between particles in a suspension and enlarging the apparent size of the fine particles.

  • coal washing process and slime dewatering, recycling lzzg

    Coal washing process and slime dewatering, recycling LZZG

    Coal washing process and slime dewatering, recycling. published date: 03-30-2019. The three most basic processes in a coal washing plant are preparation operations (crushing, screening, grading), sorting operations, and post-selection product processing operations before sorting. At the same time, heavy medium coal preparation includes five major processes: coal flow, medium flow, circulating

  • hydrophobic flocculation flotation for beneficiating fine

    Hydrophobic flocculation flotation for beneficiating fine

    OSTI.GOV Journal Article: Hydrophobic flocculation flotation for beneficiating fine coal and minerals

  • flocculation, subsidence and filtration of

    FLOCCULATION, SUBSIDENCE AND FILTRATION OF

    An exhaustive investigation of these properties for slimes of various types of uraniferous ores has been made over the past six years. From these studies, a general theory for the flocculation of suspended fine particles and colloidal dispersions by natural and synthetic polymeric flocculants was

  • flocculation for improving the processing of slag

    Flocculation for improving the processing of slag

    Increased slime content in the pulp leads to loss of copper in eventual de-sliming and loss of reagents which are adsorbed on fine particles surface, instead of reacting with pulp particles with size suitable for flotation. An eventual selective aggregation by flocculation of slime particles would mitigate the described problems. Some of the

  • flocculation and flotation of coal by adhesion

    Flocculation and flotation of coal by adhesion

    Read "Flocculation and flotation of coal by adhesion of hydrophobic Mycobacterium phlei, Colloids and Surfaces B: Biointerfaces" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • surface electrical properties of coal particles

    Surface electrical properties of coal particles

    The paper presents experimental data obtained in determining an electrokinetic potential of coal particles during their interaction with coagulation and flocculation agents. It is established that flocculation agents allow decreasing electrokinetic potential of mineral particles up to the values that promote aggregation of the particles thereby enabling the control over the stability of coal

  • cn103760316a coal slime flocculation effect

    CN103760316A Coal slime flocculation effect

    The invention discloses a coal slime flocculation effect comparison device, belonging to the technical field of coal slime treatment and aiming at overcoming the design defects that coal slime flocculation effect experiment operation in a laboratory is long in experiment period, large in errors, complicated to operate, low in efficiency and the like.

  • flocculation kinetics

    Flocculation Kinetics

    Population Balance Model for Coal Flocculation. A population balance model has been attempted to explain the flocculation behavior of coal with kerosene. The average diameter of the initial coal particles is 79 microns, the largest size of flocs is 841 microns and eight different size particles were considered in this analysis.

  • study on effectes of different inorganic electrolytes

    Study on Effectes of Different Inorganic Electrolytes

    In order to strengthen the thin coal slime settlement, and improve the efficiency of solid-liquid separation, in this paper, as the research object of Wuyang coal slime, carried out the studies on the effect of flocculation and settling with different inorganic electrolytes, and using electrophoresis analyzer, image analyzer and FTIR, characterized inorganic electrolytes effect on zeta

  • hydrophobic flocculation flotation for beneficiating fine

    Hydrophobic flocculation flotation for beneficiating fine

    It is shown that hydrophobic flocculation flotation (HFF) is an effective process to treat finely ground ores and slimes so as to concentrate coal and mineral values at a free size range. The process is based on fast dispersing the fine particles suspension, followed by flocculation of free mineral values or coal in the form of hydrophobic

  • flocculation, hydrophobic agglomeration and filtration

    Flocculation, hydrophobic agglomeration and filtration

    In coal preparation plant circuits, fine coal particles are aggregated either by oil agglomeration or by flocculation. In a new hydrophobic agglomeration process, recently developed hydrophobic latices are utilized. While the selectivity of such aggregation processes determines the beneficiation results, the degree of aggregation has a strong effect on fine coal filtration. The aim of this

  • paper open access related content

    PAPER OPEN ACCESS Related content

    magnetization, reducing the effect of MSA, and then reducing the settling rate of coal slimes. 3.2. Size analysis in the MSS . In consideration of the magnetic seeds and the coal particles are both in the range of micro sizes, the laser diffraction method was applied to analyze the sizes of coal slimes

  • application of flocculant and coagulant to coal slime

    Application of Flocculant and Coagulant to Coal Slime

    Through the analysis of size composition, ash and other properties of Qidong coal mine, three kinds of coagulants and flocculants are used to do the settlement test. The concentration of coal slime water, the types and effect of flocculant and coagulant on the settling are also studying. The research shows that when the concentration of coal slime water is 50g/L, 75g/L and 100g/L, the best

  • coal flotation chemistry slideshare

    Coal Flotation Chemistry SlideShare

    2016-11-18· Slimes particles can physically attach to the coal particles through surface charges, forming a slime coating on the coal surfaces. In general terms slimes will also follow the process water. This mechanism through which slimes report with the coal as a form of entrainment increases product ash. Of more importance is the effect of this slime coating on floatability and recovery. Ultrafine

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