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The improvement of the present invention comprises conducting the froth flotation in the presence of an effective proportion of a promoter which is at least C 10 aliphatic carboxylic acid or an...
Typical dosages of the fatty acid promoter in the froth flotation process range from about 0.005 to about 2.0 grams of promoter per kilogram of coal particles. The ester promoters are aliphatic partial or full esters of the promoter carboxylic acids described above (e.g. an ester of a monol or polyol).
A froth flotation process is described where solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother, the improvement characterized by the addition of an effective proportion of a hydrophobic, non-ionic promoter comprising a C/sub ...
Promoters for froth flotation of coal. Full Record ; Other Related Research; Abstract. This patent describes a froth flotation process where solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother. The improvement is characterized ...
Disclosed is an improved froth flotation process wherein preselected solid particles are selectively separated under froth flotation conditions as a froth phase from remaining solid feed particles...
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century. It has been described as "the single most important operation used for the ...
Froth Flotation For Bauxite Beneficiation - polyimpexch. PDF Beneficiation Of Bauxite Upgrading Of The tailings of the beneficiation plant described in chapter 4 3 Itamarita de Minas still contain bauxite which can be separated by reverse froth flotation flotation of the quartz and depression of the bauxite using starch as a depressant and amine as a promoter.
The froth flotation process for separation of mineral ores depends on the establishment of carefully controlled froth. The formation of very stable froth in the flotation circuit is a problem that ...
1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and removed, while the particles that remain completely wetted stay ...
Promoters for froth flotation of coal. Full Record ; Other Related Research; Abstract. This patent describes a froth flotation process where solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother. The improvement is characterized ...
A froth flotation process is described where solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother, the improvement characterized by the addition of an effective proportion of a hydrophobic, non-ionic promoter comprising a C/sub ...
EP0106787B1 EP19830630169 EP83630169A EP0106787B1 EP 0106787 B1 EP0106787 B1 EP 0106787B1 EP 19830630169 EP19830630169 EP 19830630169 EP 83630169 A EP83630169 A EP ...
Promoters for froth flotation of coal . Mar 1, 1984 - Sherex Chemical Company, Inc. 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 ...
Conditioner for flotation of oxidized coal: 1981-03-03: Hefner: 209/166: 4090972: Effective promoter extender for conventional fatty acids in non-sulfide mineral flotation: 1978-05-23: Wang et al. 252/61: 2690259: Froth flotation of iron sulfide ore: 1954-09-28: Anderson: 209/166
Promoters for froth flotation of coal. Title (de) Promotoren für Kohleschaumflotation. Title (fr) Promoteurs pour la flottation du charbon par formation d'écume. Publication. EP 0106787 A2 19840425 (EN) Application. EP 83630169 A 19831013. Priority. US 43424382 A 19821014; US 43424482 A 19821014; Abstract (en) [origin: US4589980A] Disclosed is an improved process wherein coal
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 effective proportion of a hydrophobic, non-ionc promoter which is a C ...
Aromatic polycyclic, hydrocarbon compounds bearing at least one nuclear sulfonic acid or sulfonate moiety are useful as froth promoters to improve the recovery of clean coal in the froth flotation of finely-divided coal. Disulfonated diphenyl ether compounds bearing at least one nuclear alkyl group of from 10 to 22 carbon atoms are particularly efficacious.
Metallurgical ContentFrothers behaves as SoapFrothing ReagentsSURFACE TENSIONCreating a Froth for FlotationTesting Frother Performance The next reagent that is added is the Flotation FROTHER. The frother strengthens the surface tension of the air that is injected into the flotation cell. As the air rises in the shape of bubbles, they come into contact with the mineral laden collector which ...
Froth Flotation For Bauxite Beneficiation - polyimpexch. PDF Beneficiation Of Bauxite Upgrading Of The tailings of the beneficiation plant described in chapter 4 3 Itamarita de Minas still contain bauxite which can be separated by reverse froth flotation flotation of the quartz and depression of the bauxite using starch as a depressant and amine as a promoter.
Several types of chemicals are involved in froth flotation, and several more can be involved. First is the promoter or frother. This chemical simply creates bubbles of sufficient strength to make it to the surface without breaking. The size of the bubbles are important, also, and the trend is to small bubbles, since they give more surface areas (contact mineral solids faster), and have greater
Aromatic polycyclic, hydrocarbon compounds bearing at least one nuclear sulfonic acid or sulfonate moiety are useful as froth promoters to improve the recovery of clean coal in the froth flotation of finely-divided coal. Disulfonated diphenyl ether compounds bearing at least one nuclear alkyl group of from 10 to 22 carbon atoms are particularly efficacious.
Promoters for froth flotation of coal - Sherex Chemical ... 1986-5-20 I claim: 1. In a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as the froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother, the ... US4589980A - Promoters for froth flotation
Froth flotation of Aljustrel sulphide complex ore 761 chalcopyrite promoter was added and two minutes later the frother was added. One minute later, the air valve was opened and flotation started with the first concentrate collection lasted three minutes. Next, the air valve was closed, pH adjusted and the promoter added. The air valve was ...
The most widely accepted method for upgrading ultrafine coal is froth flotation. Froth flotation is a physicochemical process that separates particles based on differences in surface wettability. Flotation takes place by passing finely dispersed air bubbles through an aqueous suspension of particles (Fig. 17). A chemical reagent, called a frother, is normally added to promote the
1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and
The formation of very stable froth in the flotation circuit is a problem that may occur in many plants, resulting in down-time, low quality and grade of final product and considerable expenses....
This invention relates to a novel composition of matter useful as a synergistic promoter in the recovery of zinc values in the froth flotation of zinc ores. More particularly, this invention relates to such a composition comprising from about 25 to 75 weight percent of an ester of mercapto carboxylic acid and, correspondingly, from about 75 to 25 weight percent of an organic dithiol.
The new flotation promoter (PGS) was synthesized with natural cottonseed oil and industrial by-products, and the new emulsified flotation agent (ZFC) for coal was prepared by 3% PGS promoter, 27% diesel oil and 70% water. The ZFC and diesel oil were used as collector to do the flotation rate experiments with two 1/3 coking coal samples, and first-level flotation dynamics
Note that froth mobility and froth stability are two aspects of froth characteristics that determine the flotation recoveries such as froth recovery and air recovery in mineral flotation. Froth rheological parameters such as yield stress and apparent viscosity are generally a measure of the degree of froth mobility. A positive correlation of froth rheology (froth mobility) and froth
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