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fine particles flotation patent

fine particles flotation patent

US Patent Application for FLOTATION SEPARATION OF

2014-9-24 · 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 by ...

US5304317A - Froth flotation of fine particles - Google ...

US5304317A US07/979,918 US97991892A US5304317A US 5304317 A US5304317 A US 5304317A US 97991892 A US97991892 A US 97991892A US 5304317 A US5304317 A US 5304317A Authority US United States Prior art keywords particles polymer froth flotation coal mineral Prior art date 1991-03-28 Legal status (The legal status is an assumption and is not a legal conclusion.

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

Carrier particle for the froth flotation of fine ores . United States Patent 4523991 . Abstract: This invention is a froth flotation process for beneficiating finely sized mineral matter from a finely sized mineral ore pulp comprising floating the finely sized mineral ore pulp in a frothing

US4981582A - Process and apparatus for separating fine ...

A method and apparatus are disclosed for the microbubble flotation separation of very fine particles, especially coal, so as to produce a high purity and large recovery efficiently. This is accomplished through the use of a high aspect ratio flotation column, microbubbles, and a countercurrent use of wash water to gently wash the froth.

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.

Froth Flotation Method for Recovery of Ultra-Fine

2020-10-13 · Froth Flotation Method for Recovery of Ultra-Fine Constituent Bhupendra K. Parekh University of Kentucky, [email protected] ... This Patent is brought to you for free and open access by the Center for Applied Energy Research at UKnowledge. It has been accepted for inclusion in ... with hydrophobic particles rise to the surface of the ...

EP1138820A1 - Process for the removal of fine particle ...

Following suspension and dispersion (1) of waste paper fibers (S) in water (W), and any pre-cleaning (2), the suspension is passed through the screen separator (11) in a fine fractionation (3) process. The fine fraction (6) contains impurities; the coarse fraction contains predominantly paper fibers. The fine fraction is subjected to a froth flotation process (4, 4') collecting the fine ...

Method for froth flotation - KHAN LATIF A.

The separation of fine particles by froth flotation techniques presents particular obstacles which are only overcome with great difficulty and cost by known techniques, such as use of multiple machines in series or parallel, and known techniques still have limitations in the degree of separation which can be achieved.

(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

US Patent Application for FLOTATION SEPARATION OF

2014-9-24 · 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 by ...

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

Carrier particle for the froth flotation of fine ores . United States Patent 4523991 . Abstract: This invention is a froth flotation process for beneficiating finely sized mineral matter from a finely sized mineral ore pulp comprising floating the finely sized mineral ore pulp in a frothing

"Flotation Process"

The current product from mines may typically yield at best 2 percent to as low as 0.8 percent of the metal, as fine particles of the mineral thinly distributed throughout the rock. One hundred tons of ore contains 99 percent waste material that must be separated to

Process and apparatus for separating fine particles by ...

1991-1-1 · @article{osti_7032153, title = {Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles}, author = {Yoon, R H and Adel, G T and Luttrell, G H}, abstractNote = {A method and apparatus are disclosed for the microbubble flotation separation of very fine particles, especially coal, so as to produce a high ...

Method for separating fine particles by selective ...

A method for separating fine particles of a hydrophobic material from a mixture of fine particles including at least one component comprising a non-hydrophobic material by selective hydrophobic coagulation, wherein said particles have a mean particle size of less than

Surface nanobubbles and their roles in the flotation of ...

2021-11-12 · Introduction. Froth flotation, which is based on the difference in the surface hydrophobicity among different particles in slurry, is an effective and widely used method for separating fine particles , , .In flotation, raw ores are often prepared initially by a grinding or crushing machine to obtain a reasonable size distribution and are then conditioned with a collector, such as kerosene or ...

Hydrodynamics of froth flotation and its effects on fine ...

2021-11-1 · Froth flotation is a physicochemical separation technique that exploits the difference in the surface wettability of mineral particles (Wills and Finch, 2016).From a heterogeneous mixture of solids, hydrophobic particles are made to attach to gas bubbles and subsequently carried to the froth phase and recovered as a froth product (typically the value mineral concentrate), while hydrophilic ...

Magnetic conditioning of sulfide minerals to improve ...

2018-2-1 · In flotation practices, as particles become finer, such as smaller than 20 µm, process efficiency declines markedly. Selective agglomeration of fine particles is a technique to enhance the recovery of fine valuable minerals in flotation circuits. Different agglomerating methods have been introduced and tested. One method that has recently received much attention is to make use of

NEWCREST’S INDUSTRY FIRST APPLICATION ... - Eriez

2019-10-29 · particles should all adsorb the same collector concentrations per unit of surface area and therefore possess the same contact angle (Crawford & Ralston 1988). In the work of Gontijo et al. 2007 it was determined that both fine and coarse particles require higher contact angles for flotation than intermediate particle sizes to

How to Recover Ultra-Fine Particles - Sepro Mineral

2021-6-29 · These ultra-fine particles typically make flotation unattractive and we are left with gravity concentration as the only viable option. 3. GRAVITY CONCENTRATION While gravity concentration has historically been confined to the recovery of relatively coarse particles,

US Patent Application for FLOTATION SEPARATION OF

2014-9-24 · 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 by ...

FLOTATION SEPARATION OF FINE COAL PARTICLES FROM

2014-9-24 · Coal fines are processed by flotation separation to separate coal particles from ash-forming component particles. Coal fines are mixed water

"Flotation Process"

The current product from mines may typically yield at best 2 percent to as low as 0.8 percent of the metal, as fine particles of the mineral thinly distributed throughout the rock. One hundred tons of ore contains 99 percent waste material that must be separated to

Hydrodynamics of froth flotation and its effects on fine ...

2021-11-1 · Froth flotation is a physicochemical separation technique that exploits the difference in the surface wettability of mineral particles (Wills and Finch, 2016).From a heterogeneous mixture of solids, hydrophobic particles are made to attach to gas bubbles and subsequently carried to the froth phase and recovered as a froth product (typically the value mineral concentrate), while hydrophilic ...

(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.

Effect of Ferric Ions on Sulfidization Flotation of ...

Digenite fine particles are easily oxidized and ferric ions (Fe3+) commonly exist in the flotation pulp of digenite. This study investigated the effect of Fe3+ on the sulfidization flotation of oxidized digenite fine particles using sodium butyl xanthate (SBX) as a collector. The results of microflotation experiments show that the flotation rate and recovery of oxidized digenite fine particles ...

Effect of Ferric Ions on Sulfidization Flotation of ...

2021-3-16 · Digenite fine particles are easily oxidized and ferric ions (Fe3+) commonly exist in the flotation pulp of digenite. This study investigated the effect of Fe3+ on the sulfidization flotation of oxidized digenite fine particles using sodium butyl xanthate (SBX) as a collector. The results of microflotation experiments show that the flotation rate and recovery of oxidized digenite fine particles ...

(PDF) Role of Bubble Size in Flotation of Coarse and Fine ...

The low flotation recovery of fine particles is mainly due to the low probability of bubble–particle collision, while the main reason for poor flotation recovery of coarse particles is the high ...

NEWCREST’S INDUSTRY FIRST APPLICATION ... - Eriez

2019-10-29 · particles should all adsorb the same collector concentrations per unit of surface area and therefore possess the same contact angle (Crawford & Ralston 1988). In the work of Gontijo et al. 2007 it was determined that both fine and coarse particles require higher contact angles for flotation than intermediate particle sizes to

Principles of Froth Flotation | SpringerLink

At the other end of the flotation size-range, the surface characteristics of all particles in the pulp are more similar at very fine sizes. Somewhere below 10μ, and for most ores at about 3μ to 5μ, it becomes increasingly difficult to control and exploit differences in surface properties with the accuracy needed to depress gangue, and float ...