chemical reagents for enhanced coal flotation

10.1016/S0378-3820(02)00025-5 | DeepDyve

In order to improve flotation performance of the coal sample, other flotation reagents were used in the study. ... Enhanced flotation results obtained using frother P948 and collector SPP can be attributed to more stable froth created by P948 than MIBC and improved dispersion of fuel oil in the presence of petroleum sulfonate contained in ...

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Chemical conditioning of fine coal for improved flotation and pyrite ...

The choice of these reagents and level of addition depends on the coal to be floated and the desired level of selectivity with respect to ash and sulfur. Because pyrite from coal has some tendency to float, use of these agents tends to cause their flotation along with coal, destroying the clean coal product quality.

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Application-BLUWAT

Bluwat Chemicals is a professional supplier of water treatment chemicals in China. We provide our customers both traditional and innovative products to ensure optimum control in a wide variety of applications, which including treatment of drinking water, waste water, process water. ... 1,Wash and precipitating agent for mining process or coal ...

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University of Kentucky UKnowledge

cally, either physical or chemical coal cleaning tech niques are utilized. Generally, however, physical coal . cleaning techniques such as froth ?otation or oil ag glomeration are more economical than chemical leach . ing techniques. Of these two physical coal cleaning . techniques, froth flotation appears to be the most eco nomical and well ...

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Performance Chemicals for Enhanced Oil Recovery - BASF

Our chemical and process expertise includes reagents, equipment, process technologies and know-how. All of which are focused on hydrometallurgy, solid liquid separation, tailings management, materials handling, flotation and digital mining solutions. BASF's Mining Solutions business offers a diverse range of mineral processing chemicals and tech-

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Activity of Different Chemistry Agents in Flotation of Difficult Slack Coal

Dec 3, 2021In slack coal flotation, such apolar agents as kerosene, diesel fuel, catalytic gas oil, RSO, and fraction C 10+ of higher aromatic hydrocarbons are used as collectors [ 1, 2 ]. Apolar reagents are represented by non-polar molecules which interact via Van der Waals forces.

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Activity of Different Chemistry Agents in Flotation of Difficult Slack Coal

Dec 3, 2021Group chemical composition of the flotation agents is presented below, %: apolar agents: ... Enhanced flotation performance using FLOTEC is due to its high velocity of spreading on water surface—24.3 cm/s and low solubility. ... izbr. tr. (Basic Action of Reagents in Flotation of Bituminous Coal. Mineral Dressing: Selected Works), Moscow ...

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US4770767A - Method for the froth flotation of coal - Google

The froth flotation of coal is conducted in the presence of a conditioner of an oxygen containing compound of the formula: R.sub.1 --O--R.sub.2).sub.n (I) wherein R 1 and each R 2 are independently saturated hydrocarbyls and n is from 1 to about 3. ... Dow Chemical Co Original Assignee Dow Chemical Co Priority date (The priority date is an ...

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10.1016/S0301-7516(00)00034-X | DeepDyve

The selectivity of the flotation process was highest for this fraction (ash reduction 17%), however, the corresponding recovery of coal was very low (35%). The enhanced separation of coal and mineral matter in this case, is most probably attributed to the presence of high ash fines in the feed, which was confirmed by microscopic examination.

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Enhanced Flotation Separation of Low-Rank Coal with a Mixed Collector ...

coal slime has been reported. Xia et al.10used coal tar and diesel as a mixed collector to carry out low-rank coal flotation, and the cleaned coal yield increased from 38.6 to 87.4%, effectively improving the flotation effect. Liao et al.11 investigated the flotation performance of dodecane, ethyl

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REFLUX Flotation Cell (RFC) |

The REFLUX Flotation Cell (RFC) repeatedly demonstrates a robustness to operate at extreme levels of gas flux, feed flux, and fluidisation wash water flux, an order of magnitude beyond existing flotation methods in mining.

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Effect of Two-stage Stirred Pulp-mixing on Coal Flotation

* School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China, Corresponding author, guixiahui1985@163 ... enhanced the combustible matter recovery effect of coarse particles at a suitable flotation feed rate, and ensured the ... coal slime and flotation reagents were fed into a two ...

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ZZZ Flotation Reagents | PDF | Adsorption | Functional Group

Nowadays, flotation is widely used in minerals separation, treatments of slag and wastes, materials sepa-ration, and valuables recovery in metallurgical, coal, and chemical engineering. Flotation reagents have played vital roles in the progress of flotation process.

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FLOTATION MATRIX 100 to Change the Face of Chemical Reagent Selection ...

According to Gary Thundercliffe, global marketing manager, Mining Chemicals, Cytec Industries Inc., the recovery and grade concentrate yielded in flotation depends on a number of environmental and operational factors, and is significantly enhanced by customized reagents designed specifically for the customers' milling process.

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Flotation of Carbonaceous Material With Reagents Based on Acetylene ...

gents used in coal flotation and issues of flotation of finely dis-persed coal are considered. The flotation tests on different grade coal from the Kuznetsk Coal Basin show an increase up to 12% in recovery and yield of valuable components in concentrate as com-pared with the common reagents. Moreover, the flotation rate be-comes 2 times higher.

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Enhanced Gravity Separator - 911Metallurgist

Chrome, Copper, Lead Zinc, Tunstan, Tantalum, Gold, Iron Tin, Coal, Barites, Celestile Fluorspar, Titanium, Antimony Operational Advantages Field-proven robust & compact design Fine and ultra-fine separation from 100μm to 5μm Energy efficient - mobile deployable Minimum maintenance & operating supervision required

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The Future for Flotation | E & MJ

The Future for Flotation. Flotation has been a mainstay of mineral processing for the best part of a century, and the technology continues to develop. E&MJ asked some of the world's suppliers of equipment and reagents for their insights on current and future trends. Flotation is one of the key technologies within the mineral processing catalogue.

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Clean low-rank-coal purification technique combining cyclonic-static ...

Chemical Reagents for Enhanced Coal Flotation R. Jia, G. H. Harris, D. Fuerstenau Materials Science 2002 Designing new reagents is of vital importance for the flotation of coal, especially for processing low-rank and/or oxidized coals, which are difficult to float with commonly used fuel oil or kerosene. 82

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A review on flotation of coal using mixed reagent systems

Nov 1, 2021Mixed reagent systems are very effective in flotation for realizing higher selectivity of the targeted particles and minimal reagent Conclusion Many mixed reagents, ranging from polar collectors to fatty acid mixtures, have been used in coal flotation to improve floatability efficacy. Based on the literature, the following conclusions can be drawn:

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FLOTATION Bubble+Particle Adherence: Synergistic Effect of Reagents

Sulfhydryl chemical composition of the reagent changes when or thiol collectors are used for the Sotation of sulRde another compound is present through, for example, minerals and, of these, xanthates, Rrst patented in a dimerization reaction. ... Synergistic Effect of Reagents 1457 Table 1 The effects of mixing reagents in Flotation ...

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Application of electrochemical investigation methods in high sulfur ...

The U.S. Department of Energy's Office of Scientific and Technical Information

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Modified alcohol frothers for froth flotation of coal - osti.gov

the improvement described here is characterized by the alcohol frother comprising the reaction product of a c/sub 5/-c/sub 10/ diol and a compound selected from the group consisting of: (a) between about 2 and 10 moles of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, and mixtures thereof, and (b) an .

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The Study of Strategi̇es for Improving Economics of Open Pit Mining ...

The conventional and ultrasonically-assisted flotation tests of the original and aged coal slimes were performed using Montanol-531, a special coal flotation reagent at variable dosages.

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The use of fatty chemicals as flotation reagents - DeepDyve

Fatty chemicals are widely used as flotation collectors in the mineral-processing industry and, even though this application is quite old, improvements are being made with regard to both application and utilization. Most of the fatty chemicals that are used in flotation are used in the processing of industrial minerals such as phosphate, potash, iron ore, cement rock, and feldspar.

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Coal Flotation Chemistry - SlideShare

It is important to distinguish between the processes of coagulation and flocculation in chemically enhanced sedimentation. ... Erol, M., Colduroglu, C. and Aktas, Z., 2003, The Effect of Reagents and Reagent Mixtures on Froth Flotation of Coal Fines, International Journal of Mineral Processing, 71 (2003) 131- 145. ... 439 - 454, 2016, pp ...

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Desulphurisation flotation for the selective Town removal of pyrite ...

reagents that can be used in the selective separation of sulphide minerals using froth flotation. Just like conventional chemical flotation reagents, the microorganisms assist separation through surface chemical alterations that modify a mineral's hydrophobic properties, thus facilitating bioflotation.

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A review on flotation of coal using mixed reagent systems

Nov 1, 2021The addition of fatty acid mixtures such as fuel oil and oleic acid at a ratio of 1:4 for oxidized bituminous coals improved floatability performance with a simultaneous increase in combustible recovery up to 75% from 15%. Further, the ash content of the froth was reduced to below 9%.

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Interaction Forces between Paraffin/Stearic Acid and Fresh/Oxidized ...

Effective fresh coal flotation can be achieved using conventional hydrocarbon oily collectors while oxidized coal flotation can be enhanced using oxygen-containing fatty acid. Solid-state paraffin and stearic acid were selected to represent a hydrocarbon oil and fatty acid collector in the present study, respectively.

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Flocculant used used for all kinds of mineral processing, China ...

In the process, a fine powder coal is produced, which requires further processing and recycling. This process is usually carried out by flotation methods, with flotation reagents to improve the separation efficiency of coal and impurities. Refined Coal is flotated, and the tail coal is setting down.

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Evaluation of Chemical Reagents to Enhance the Dewatering of Fine Coal ...

These reagents were selected in such a way that they could be grouped into different categories depending on their action. The results showed that the surface tension reducing reagents (STR) have a...

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On: 17 September 2014, At: 18:28 Collector on the Flotation of a Low ...

of coal due to the molecule orientation of the 2-ethyl hexanol and flotation reagents on the surface of the coal [1, 14, 19]. Furthermore, the facilitation of the spreading of

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Minerals | Special Issue : Flotation Reagents, Volume II - MDPI

Jan 14, 2022Conventional hydrocarbon oil cannot adhere effectively to oxidized coal, resulting in a low yield of clean coal. In this study, a high-speed homogenizer was used to emulsify LDD (laurylamine dipropylene diamine) and kerosene, which enhanced the flotation efficiency of oxidized coal. The flotation [...] Read more.

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A study of the interfacial chemistry of pyrite and coal in fine coal ...

@article{osti_10158220, title = {A study of the interfacial chemistry of pyrite and coal in fine coal cleaning using flotation}, author = {Jiang, Chengliang}, abstractNote = {Surface oxidation, surface charge, and flotation properties have been systematically studied for coal, coal-pyrite and ore-pyrite. Electrochemical studies show that coal-pyrite exhibits much higher and more complex ...

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The effect of particle size on coal flotation kinetics: A review

Coal flotation is a complex multiphase process governed by different sub-processes and interphase interactions. The coal cleaning efficiency by flotation is largely affected by many different physical and chemical factors that can be roughly classified into three main group: coal feed properties, pulp chemical and rheological properties, and machine and operational properties. A great number ...

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Flotation of barium sulfate contaminants soils - MedCrave online

Flotation is a physic-chemical process in which one constituent can selectively be separated from another on the basis of surface properties. This is achieved by controlled additions of chemical reagents at predetermined pH, thereby selectively altering the surface characteristics of barium sulfate BaSO 4 compounds contaminated soils.

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Coal Flotation - an overview | ScienceDirect Topics

In coal flotation, only collectors and frothers are generally used as chemical reagents. The collector enhances the hydrophobic property of coal. Kerosene or No 2 fuel oil are usually used as collectors, while aliphatic alcohols such as MIBC (methyl isobutyl carbinol) and glycols are normally used as frothers.

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Effect of Two-stage Stirred Pulp-mixing on Coal Flotation

* School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, ... enhanced the combustible matter recovery effect of coarse particles at a suitable flotation feed rate, and ensured the ... coal slime and flotation reagents were fed into a two-stage stirring tank with diameter of 2.5 m. With valves 1 and 3 ...

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Bluwat Chemicals

Bluwat Chemicals is a professional supplier of water treatment chemicals in China. We provide our customers both traditional and innovative products to ensure optimum control in a wide variety of applications, which including treatment of drinking water, waste water, process water. ... 1,Wash and precipitating agent for mining process or coal ...

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Enhancement in hydrophobicity of low rank coal by surfactants — A ...

Abstract The flotation of fine (− 0.5 mm) low rank or oxidized coal is difficult to achieve with the common coal flotation collectors like kerosene, fuel oil or diesel oil (oily collector). The presence of small amounts of oxygen is enough to cause oxidation. The oxidation of coals starts with the physical adsorption of oxygen on the surface to form an oxycomplex followed by chemical ...

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Enhancing flotation removal of unburned carbon from fly ash by coal tar ...

In previous studies, the Wender model has been widely used to explain the adsorption mechanism of reagents on the coal surface during the low-rank coal flotation process,, .This is because the Wender model captures some essential characteristics of the chemical structure of the low-rank coal .Although Wender qualified that the structure is not a coal model, the model expresses the way the ...

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