fine particles flotation patent
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fine particles flotation patent

Froth flotation of fine particles - Google Patents

US5304317A - Froth flotation of fine particles - Google Patents. Additive composition for use in separating particles of a desired material from particles of an undesired material in a froth...

US4981582A - Process and apparatus for separating fine ...

US4981582A - Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles - Google Patents Process and apparatus...

US5051199A - Froth flotation of mineral fines - Google Patents

The process of the invention offers a number of advantages. As a result of the flocculation of the desired mineral particles fine particles present are recovered faster and more efficiently with...

US Patent Application for FLOTATION SEPARATION OF FINE ...

Sep 24, 2014  In the flotation process described herein, fine and ultrafine coal particles are floated efficiently and selectively, meaning the hydrophobic ultrafine coal particles float in the column and are collected in the overflowing coal-froth while the hydrophilic ash-forming component particles remain in the water-bubble region.

US5096572A - Froth flotation - Google Patents

The invention provides froth flotation apparatus for concentrating hydrophobic particles in an aqueous pulp containing a mixture of hydrophobic and hydrophilic particles, which apparatus includes a gas bubble-particle contact unit and a separate phase separation unit.

US9518241B2 - Method of separating and de-watering fine ...

In this invention, the fine particulate materials include but not limited to minerals and coal particles, smaller than about 1 mm in diameter, preferably smaller than about mm, more preferably...

US5051199A - Froth flotation of mineral fines - Google Patents

Particles of a desired mineral are recovered from particles of an unwanted mineral in an aqueous slurry by means of a froth flotation process in which, after treatment of the mineral particles with a collector, a predominantly hydrophobic polymeric flocculating agent, which will selectively flocculate the desired mineral particles, is added to the slurry.

US Patent Application for FLOTATION SEPARATION OF FINE ...

Sep 24, 2014  Coal fines are processed by flotation separation to separate coal particles from ash-forming component particles. Coal fines are mixed water under high shear mixing conditions to form an aqueous slurry of coal fines containing between 15 wt. % and 55 wt. % coal fines. The aqueous slurry is introduced into a coal flotation cell to separate coal particles from ash-forming component particles

US4940534A - Froth flotation column - Google Patents

A flotation chamber separates fine kaolin particles or the like by flotation out of a slurry. A generally cylindrical column has an inlet for injecting slurry into the column, a froth launder at an upper end of the column, and a tailings outlet at the lower end of the column. A draft tube is vertically oriented within the column and has upper and lower open ends.

Process and apparatus for separating fine particles by ...

Froth flotation is a method for processing fine particles, but it becomes less efficient in making a clean separation between the desired particles and the undesired particles as particle size is decreased. Froth flotation is shown in Bacon, U.S. Pat. No. 4,472,271.

US5702612A - Method and apparatus for flotation separation ...

A flotation method and apparatus for separating a selected constituent from an effluent of an industrial process is provided. The apparatus includes a conditioning tank and a flotation cell. The conditioning tank allows mixing a flotation reagent with an effluent and includes a mechanism for also dissolving gas in the effluent within the conditioning tank.

Carrier particle for the froth flotation of fine ores ...

The carrier particles of this invention should have a particle size and a density which are suitable for selectively beneficiating the finely sized mineral ore particles by froth flotation and have a surface treated with a condensation product, or acid derivative of a condensation product, of an alkanolamine with a fatty acid, a fatty acid ...

Methods for Separating and Dewatering Fine Particles ...

Flotation becomes inefficient with finer particles. On the other hand, low-grade ores often require fine grinding for sufficient liberation. In mineral flotation, its efficacy deteriorates rapidly below approximately 10 to 15 μm, while coal flotation becomes difficult below approximately 44 μm.

PROCESS FOR FLOTATION OF LARGE SIZE MINERAL PARTICLES ...

What is claimed as new and desired to be protected by Letters Patent is 1. A process for the flotation of large grain size mineral particles having a size from above 1 and up to 5 mm comprising forming an aqueous flotation suspension in which suspension a collection agent is present and, additionally introducing a weighting agent in the form of fine grain particles into the suspension of a ...

(PDF) The Limits of Fine Particle Flotation

Understanding the limits of fine particle flotation is the key to the selective separation of fine mineral particles. Fine particles have low collision efficiencies with gas bubbles and float slowly.

The limits of fine particle flotation - ScienceDirect

Apr 01, 2010  The only thermodynamic approach for the limit of flotation of fine particles has been performed by Scheludko et al. (1976). They stated that the kinetic energy of fine particles has to be larger than the energy needed to disrupt the intervening liquid film and form a three-phase contact line if bubble–particle attachment is to occur.

Coarse and Fine Particle Flotation Recovery

Mar 17, 2017  Flotation was the powerful new tool to which all refractory ores would respond. Time, however, has shown that flotation is no cure-all, and there are poor as well as good ways of applying it. Coarse VS Fine Flotation. It is a very natural assumption upon the part of many people that, the finer the particles are, the easier it is to float them.

Minerals Special Issue : Fine Particle Flotation ...

Froth flotation is the most economical method to separate minerals in ores. However, the complexity of new ore bodies requires fine grinding to liberate valuable minerals, which produces particles with sizes too fine for an efficient mineral flotation and separation.

Jameson cell - Wikipedia

This is because the fine particles have had poor flotation performance and because their presence decreases the flotation performance of the coarse particles. Legend International Holdings Incorporated ("Legend") owns major phosphate deposits that average 20–60% particles less than 20 μm that contain up to 50% of the phosphate.

Fluidized bed desliming in fine particle flotation – Part ...

Nov 01, 2014  1. Introduction. Froth flotation is used extensively in coal and mineral processing to recover and concentrate valuable fine particles. The valuable particles are made hydrophobic through the application of a collector, and their attachment and adhesion promoted using a high shear rate to effect both a collision, and then final adhesion with air bubbles.

Carrier particle for the froth flotation of fine ores ...

The carrier particles of this invention should have a particle size and a density which are suitable for selectively beneficiating the finely sized mineral ore particles by froth flotation and have a surface treated with a condensation product, or acid derivative of a condensation product, of an alkanolamine with a fatty acid, a fatty acid ...

Methods for Separating and Dewatering Fine Particles ...

Flotation becomes inefficient with finer particles. On the other hand, low-grade ores often require fine grinding for sufficient liberation. In mineral flotation, its efficacy deteriorates rapidly below approximately 10 to 15 μm, while coal flotation becomes difficult below approximately 44 μm.

US Patent for Method for the radioactive decontamination ...

May 10, 2013  Justia Patents With Modifying Agents US Patent for Method for the radioactive decontamination of soil by dispersed air flotation foam and said foam Patent (Patent # 10,105,714) ... fine particles containing most of the contamination in a

PROCESS FOR FLOTATION OF LARGE SIZE MINERAL PARTICLES ...

What is claimed as new and desired to be protected by Letters Patent is 1. A process for the flotation of large grain size mineral particles having a size from above 1 and up to 5 mm comprising forming an aqueous flotation suspension in which suspension a collection agent is present and, additionally introducing a weighting agent in the form of fine grain particles into the suspension of a ...

Recovery from fine froth flotation feed (slimes) - VAN ...

The particles rub against each other to effect cleaning, aided by the cleaning reagents. SUMMARY OF THE INVENTION. It is therefore seen to be desirable to efficiently recover minerals from conventionally discarded fine froth flotation feed (slimes).

Minerals Special Issue : Fine Particle Flotation ...

Froth flotation is the most economical method to separate minerals in ores. However, the complexity of new ore bodies requires fine grinding to liberate valuable minerals, which produces particles with sizes too fine for an efficient mineral flotation and separation.

Jameson cell - Wikipedia

This is because the fine particles have had poor flotation performance and because their presence decreases the flotation performance of the coarse particles. Legend International Holdings Incorporated ("Legend") owns major phosphate deposits that average 20–60% particles less than 20 μm that contain up to 50% of the phosphate.

The limits of fine particle flotation - ScienceDirect

Apr 01, 2010  The only thermodynamic approach for the limit of flotation of fine particles has been performed by Scheludko et al. (1976). They stated that the kinetic energy of fine particles has to be larger than the energy needed to disrupt the intervening liquid film and form a three-phase contact line if bubble–particle attachment is to occur.

Fluidized bed desliming in fine particle flotation – Part ...

Nov 01, 2014  1. Introduction. Froth flotation is used extensively in coal and mineral processing to recover and concentrate valuable fine particles. The valuable particles are made hydrophobic through the application of a collector, and their attachment and adhesion promoted using a high shear rate to effect both a collision, and then final adhesion with air bubbles.

Coarse and Fine Particle Flotation Recovery

Mar 17, 2017  Flotation was the powerful new tool to which all refractory ores would respond. Time, however, has shown that flotation is no cure-all, and there are poor as well as good ways of applying it. Coarse VS Fine Flotation. It is a very natural assumption upon the part of many people that, the finer the particles are, the easier it is to float them.

The limits of fine particle flotation - ScienceDirect

Understanding the limits of fine particle flotation is the key to the selective separation of fine mineral particles. Fine particles have low collision efficiencies with gas bubbles and float slowly. There has been a great deal of work aimed at overcoming the inefficient collision of small particles

Improving the Flotation of Fine Coal Slurries SpringerLink

Aug 30, 2020  The properties of fine coal slurries at OOO MMK-Ugol and their flotation are studied. To improve the flotation of finely disperse coal slurries, more effective reagent combinations are employed; TPA collection agent and Sinterol flocculant are considered. In the laboratory, optimal flotation conditions are developed for fine coal slurries. In these conditions, coal enrichment is more efficient ...

(PDF) COARSE AND FINE PARTICLE FLOTATION Maohong Fan ...

Figure 5 shows a typical circuit arrangement for ultra-fine phosphate separation [5]. column flotation makes it possible to extend the size range of particles that can be treated by flotation By re-processing the primary slimes (-30 μm) in second stage of hydrocyclones cutting at 5-10 μm, the cyclone underflow is fed to a series of ...

Flotation of Fine Particles: A Review Request PDF

New trends to flotation of fine particles are carrier flotation, column flotation and bio- flotation. The carrier flotation technique is applied for upgrading of Egyptian kaolin and graphite. The ...

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