Justia Patents US Patent Application for Methods for Separating and Dewatering Fine Particles Patent Application (Application #20220010226 ... flotation products due to the large surface area and the high-capillary pressure of the water trapped in between fine particles. Flotation also becomes inefficient when particle size is larger than ...

The patents published on high-grade calcite beneficiation are either based on the development of the grinding process flowsheet or the reagent scheme used in flotation. This study is based on collector systems; thus, the different reagent schemes patented for calcite ore flotation are discussed below (Table 3 ).

Hence, the electrostatic attraction between bubbles and particles contributes to a satisfactory flotation yield of fine particles. It is important to know how this concept works for magnesite (KERMA 90-45). The zeta potential of bubbles in the presence of 0.05 mol/L hexylamine (ζ 1 = 65 mV) were measured. Figure 16.

Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m3 to 1000 m3. However, this increase has created new challenges in the operation and design of industrial flotation cells, particularly in terms of froth removal, because the distance the …

The full-scale REFLUX™ Flotation Cell, which is shown in Fig. 3, had an internal diameter of about 2 m. The upper vertical section had a height of about 1.6 m and the inclined channels were nominally 1.0 m long, with a 20 mm spacing and an inclination of 70° to the horizontal. As discussed, the feed slurry entered through an air sparger ...

Split of spodumene flotation into coarse particle flotation (in cells such as the Eriez Hydrofloat) and fine particle flotation (in conventional flotation cells) The key flotation flowsheet stages include the following: Primary grinding. Grind sizes such as F 100 300 μm, or finer, based on spodumene liberation characteristics (see Fig. 1).

The issues related to fine particle flotation have been extensively studied (e.g., [1,2]). It is generally accepted that many of these problems are owing to the low mass and high surface area of fine particles and a number of contributory factors that are usually interrelated . All of these factors, which will be discussed below, have the ...

Justia - Patents - Patents and Patent Application Resources. Abstract: A process for roasting of metal concentrate wherein concentrate particles are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1200° C. in a fluidized bed to form a calcine. At least parts of the calcine are withdrawn from the …

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 …

Abstract: An apparatus for froth flotation including a flotation vessel including a side wall and a bottom wall that includes a fluid drain, and a mixing eductor inside the vessel disposed to impart net rotational force to contents of the vessel about an axis; and a method of separating a desired constituent (e.g., coal) from a mixture of …

U.S. patent application number 16/909452 was filed with the patent office on for flotation separation of fine coal particles from ash-forming particles. The applicant …

US6612444 Grinding into particles and contacting with water to form a slurry, attritioning and contacting with gas bubbles and flotation agents to form a froth 08/2003 08/28/2003

US Patent No. 4981582, . Yoon, R.H., 1993. ... Mechanisms underpinning the promotion of fine-particle flotation by nanobubbles include the agglomeration of fine particles, high stability ...

economical froth flotation device and process capable of separating floatable particles from an aqueous pulp of a mixture offloatable and non-floatable particles with a …

The issues related to fine particle flotation have been extensively studied (e.g., [1,2]). It is generally accepted that many of these problems are owing to the low mass and high surface area of fine particles and a number of contributory factors that are usually interrelated . All of these factors, which will be discussed below, have the ...

@article{osti_871864, title = {Apparatus and process for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles}, author = {Yoon, Roe-Hoan and Adel, Gregory T and Luttrell, Gerald H}, abstractNote = {A method and apparatus are …

In particles flotation, a large particle size is conducive to the collision between bubbles and particles. Dai et al. [113] reviewed various collision models of particle-bubble and pointed out that all the collision models predicted that the collision efficiency would increase with particle size. The Yoon-Luttrell model is one of the typical ...

Particle shape has a significant effect on the flotation process of fine mineral and fine coal particles. In this paper, the effects of particle shape on the flotation kinetics and behavior of fine coking coal of different size fractions were investigated. The coal particles with different shape properties were gained from the grinding and crushing …

This invention relates to the froth flotation of fine particles and in particular to the recovery of coal from an aqueous slurry of coal fines also containing associated impurities as suspended fine solids by froth flotation, and to the beneficiation of fine mineral particles …

The pump impeller is designed to promote generation of small bubbles to improve flotation performance. Particles 27 which are not liberated or which have a weak attachment to flotation bubbles circulate to the collection zone 26 of the grinding device 20. These particles 27 re-enter the grinding zone 28, and

Dissolved Air Flotation (DAF) is a water treatment process that removes suspended solids, oil, and grease from wastewater by using air bubbles as a flotation agent. The process …

flotation ( coarse particle flotation ) patent application publication sizing tailings -11 9 ' 15 33 cleaning regrinding 5 9 37 crushing milling & sizing final concentrate jun . 9, 2022 sheet 2 of 10 43 83 cleaning regrinding -9 " 41 45 39 coarse split to 100 ( ~ < 75 microns ) fines flotation roughing / ( scavenging ) us 2022/0176387 a1 fig . 2

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Abstract. 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 …

Abstract: A tethered imaging camera encapsulated in a shell lens element of such camera enables viewing from inside and imaging of a biological organ in/from a variety of directions. A portion of camera's optical system together with light source(s) and optical detector mutually cooperated by housing structure inside the shell are moveable/re-orientable …

Living reference work entry. First Online: 03 May 2023. Download reference work entry PDF. Fine particle flotation is a process where the flotation efficiency of fine …

3. Chalcopyrite Flotation Collectors. When a particle collides with the bubble, the possibility of attaching depends fundamentally on the hydrophobic nature of the mineral surface. Although minerals present natural floatability, this condition is often insufficient to achieve industrially sustainable performance.

What is claimed is: 1. A system for separating particles from a contaminated liquid stream by flotation, comprising: an apparatus for mixing the liquid with a separation enhancement additive and a gas; a pressure reducing device in fluid communication with an outlet of the mixing apparatus for creating bubble laden floccs in the liquid; a flotation …

A novel apparatus for use in frothless flotation. The apparatus includes a cover which is sealingly engaged to the top of the flotation column and a wash-water tank in communication with the upper part of the flotation column wherein the level in the wash-water tank is maintained at or above the level of the cover thereby preventing the …

1. In a process for the separation of coal particles from fly ash by flotation in water containing at least one collector and at least one frother, whereby a comparatively pure coal fraction is obtained as a top froth fraction, and a substantially non-carbonaceous ash fraction is obtained as a bottom depressed fraction, the improvement of carrying out said …