Advances in depressants used for pyrite flotation separation …

Advances in depressants used for pyrite flotation separation from coal/minerals. Authors: Yulong Li. G. Cheng. Henan Polytechnic University. Mengni …

Thermo-adhesive Separation: a Novel Dry Coal Beneficiation …

Separation of Pure Coal or Pyrite. Tests were conducted to determine the amount of coal or pyrite particles that stuck to the resin-coated belt. Two types of resins having softening points of 70 °C and 100 °C were used with the tungsten filament and IR-red lamps. In these tests, instead of collecting the heated sample in a collection tray, it ...

Occurrence Characteristics of Fine-Grained Pyrite in Coal …

In summary, framboïdal pyrite, disseminated pyrite, and monomer pyrite are the main forms of pyrite occurrence in the middlings and cleaned coal with different coal particle sizes (75–44, 44–37, and 37–15 μm), and their size is between 0.69 and 33.94 μm . Fine-grained pyrite is difficult to effectively separate from the coal matrix ...

Occurrence Characteristics of Fine-Grained Pyrite in Coal …

10−120 μm is the optimal particle size for the separation of pyrite in a flotationexperiment.26 Besides, scholars have carried ... In addition, two types of coal …

Advances in depressants used for pyrite flotation separation from coal

Pyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the concentrate and consequently reduce the quality of concentrate. Highly efficient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity, thereby …

Removal of Iron from Pyrite-Rich Coal Refuse by …

The 2.20 specific gravity sink fraction of Baker coal seam coarse refuse was pulverized to finer than 180 μm, calcined at various temperatures, and separated into magnetic and non-magnetic ...

Microwave heating of coal for enhanced magnetic removal of pyrite

The performance of magnetic separation in removing mineral pyrite from coal can be improved by increasing the pyrite's magnetic susceptibility. Several studies have shown that magnetic susceptibility of pyrite can be enhanced by heating [7]. However, the problem of heating pyrite in coal is that energy is wasted by also heating the coal [8].

(PDF) Optimizing the Performance of the Wet High Gradient …

Wet high gradient magnetic separation WHGMS of an Egyptian coal sample was carried out to minimize its pyritic sulfur content reaching 1.60% (2.9% total sulfur).

Removal of Iron from Pyrite-Rich Coal Refuse by Calcination …

Removal of Iron from Pyrite-Rich Coal Refuse by Calcination and Magnetic Separation for Hydrometallurgical Extraction of Rare Earth Elements. / Gupta, Tushar; Nawab, Ahmad; Honaker, Rick. In: Minerals, Vol. 13, No. 3, 327, 03.2023. Research output: Contribution to journal › Article › peer-review

The desulfurization of finely disseminated pyrite in coal with …

@article{osti_20082380, title = {The desulfurization of finely disseminated pyrite in coal with new technology}, author = {Zesheng, X and Shoulu, W and Ying, G and Xinguo, W and Zuna, W}, abstractNote = {China is a country of large coal production, quite a quantity of which is of high sulfur. With the increase of mining depth, more production …

Transformation behaviour of pyrite during microwave …

Pyrite is extremely susceptible to oxidation to magnetite (Fe 3 O 4) and hematite (Fe 2 O 3) by microwave heating in an oxygenated atmosphere, making pyrite in coal further removable by secondary magnetic separation [41], [42], which leads to a more complex pyrite sulfur conversion process. From previous studies, it can be inferred that ...

Biodesulfrization technologies for selective separation of coal from pyrite

3-2-Separation of fine coal from pyrite by Mycrobacterium phlei (M. phlei) Typically, density separation is used to clean coarse coal while surface property-based methods are preferred for coal cleaning. Mycrobactrrium phlei was highly hydrophobic with a contact angle of 70 and point-of zero charge was around pH 2. Table2 shows hydrophobicity ...

How to Remove Pyrite from Coal

The source of nearly 50 pct of the sulfur content of an average bituminous coal used by an electric utility is pyrite (FeS2); pyrite is a component that is not chemically bound to the coal and, therefore, can be removed by physical separation methods. …

Hydrodynamics of electroluidization: Separation of pyrites …

Dry, electrostatic separation is a potentially efficient method of removing pyrites from coal. However, progress in the past was hampered by a lack of a quantitative analysis of the …

The investigation of coal–pyrite/lignite concentration and …

The separation of pyrite from coal by oil agglomeration is basically determined by the relative hydrophobicities of the coal and pyrite. To enhance the separation, the surfaces need to be modified in order to change the hydrophobicity of coal and pyrite. A number of organic and inorganic reagents have been reported to be good …

Advances in depressants used for pyrite flotation separation …

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The depression of pyrite in selective flotation by different …sciencedirectThe flotation separation of sphalerite from pyrite through a …researchgateRecommended to you based on what's popular • Feedback

Studies of pyrite coal separationaiche.onlinelibrary.wileyHydrodynamics of electroluidization: Separation of pyrites from coalDry, electrostatic separation is a potentially efficient method of removing pyrites from coal. However, progress in the past was hampered by a lack of a quantitative analysis of the process. To help us design better separation equipment, we have developedAuthor: Y. T. Shih, Dim…Published: August 1987Cited By: 14ResearchGateElectrostatic Separation of Pyrite From CoalThis paper reviews the various forms of electrostatic separation available to remove sulphur, in the form of pyrite (FeS2) from coal. Research has been carried out to desulphurise coal using an electrostatic roll separator which uses the corona chargingAuthor: D. A. Butcher, …Published: 1995/01/01DOI: 10.1155/1995/65201ResearchGateAdvances in depressants used for pyrite flotation separation from coal/mineralsPyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the concentrate and consequently reduce the quality of concentrate. Highly efficient pyrite depressantsPublished: 2022/12/01DOI: 10.1007/s40789-0…

ACS Publicationshttps://pubs.acs/doi/10.1021/acsomega.2c05698

Occurrence Characteristics of Fine-Grained Pyrite in Coal and …

WEBThe pyrite in coal mostly coexists with the coal matrix, called coal-pyrite in this study, and some monomer pyrite. Among them, framboïdal pyrite, smaller …

Desulfurization of microwave pretreated fine coal by magnetic separation

The production of pyrite extraction by the conventional magnetic separation method was effectively improved by increasing the magnetic susceptibility of pyrite. The electromagnetic characteristics and the absorption response of fine high-sulfur coal were studied for their improving effect on the magnetic susceptibility of pyrite.

Iron removal from kaolinitic coal gangue via magnetic separation …

The efficiency of magnetic separation is directly related to the magnetism of the feed ore, and a magnetic difference between the iron minerals and the gangue would facilitate magnetic separation [23], [24]. In coal gangue, kaolinite is nonmagnetic, quartz (SiO 2) and calcite (CaCO 3) are diamagnetic, and minerals containing Mn 2+ ions are ...

Fine Coal Desulfurization by Magnetic Separation and the …

Pyrite in fine coal was heated selectively by microwave energy to strengthen its magnetism in this study. Then, the inorganic sulfur in fine coal (−0.5 mm) was removed using a 2 T strong magnetic roller magnetic separator. The migrating regulation of organic sulfur-containing groups and harmful elements was analyzed by employing a …

Electrostatic Separation of Pyrite From Coal

This paper reviews the various forms of electrostatic separation available to remove sulphur, in the form of pyrite (FeS2) from coal. Research has been carried out to desulphurise coal using an electrostatic roll separator which uses the corona charging technique. Data is presented here to conflict with previous reports that indicated that the …

Electrostatic Separation of Coal Macerals

The electrification and separation of the pyrite maceral from coal by means of dilute phase fluidization and electric fields is discussed. Some results are also presented on the separation of the vitrinite, fusinite, exinite, and micrinite macerals as well as of coal fractions with high ash content. The results show the effectiveness of the ...

Formation of pyrite in the process of fine coal …

ABSTRACT Coal desulfurization, one of the important research objectives of clean coal technology, has been attracting great importance globally, especially by coal producing and coal consuming countries. Developing clean coal preparation technology before combustion is of great significance to decrease the pollutant emission to the …

(PDF) Electrostatic Separation of Pyrite From Coal

PDF | This paper reviews the various forms of electrostatic separation available to remove sulphur, in the form of pyrite (FeS2) from coal. Research has... | Find, read and cite all the...

Formation of pyrite in the process of fine coal …

The desulfurization degree of–0.074 mm fine coal is twice that of the coal particles with the size in the range 0.3–0.5 mm. Magnetic separation of pulverized coal effectively enhanced the ...

(PDF) Improve the efficiency of coal triboelectric separation …

Rotary triboelectric separation of untreated low-rank coal indicated that the optimal separation, i.e., a vitrinite content of 65.45% and a recovery of 69.89%, was obtained at a feed rate of 1.5 g ...

Process for electrostatic separation of pyrite from crude coal …

Abstract. An improved process is disclosed for electrostatic separation of pyrite from powdered crude coal comprising vigorously mixing the powdered crude coal with a selected fatty acid glyceride as a conditioning substance and conducting the electrostatic separation at a relative humidity of 2.5--20 percent and a temperature between room …

Removal of pyrite from coal by dry separation methods.

Abstract. Sulfur dioxide emissions from coal-burning power plants can be significantly lowered by removing pyrite from the coal prior to buming. Conventional wet washing …

(PDF) Enhanced magnetic separation of pyrite from coal

Separation of pyrite from coal would be facilitated by changing a portion of each pyrite particle to a more magnetic form. The selective magnetic enhancement of pyrite in coal by dielectric ...

Maceral and pyrite partitioning through high-gradient magnetic

With fine coal (90 percent passing 200 mesh (75 pm)), he found that increased retention time favored separation of pyrite from coal with three 30-second wet passes being more successful than three 30-second dry passes or a 120-second retention time. The best pyritic sulfur reduction was obtained for the Indiana VI from Warrick …

Pyrite depressants useful in the separation of pyrite from coal …

@article{osti_5840710, title = {Pyrite depressants useful in the separation of pyrite from coal}, author = {Klimpel, R R and Hansen, R D}, abstractNote = {A process is described for the depression of the flotation of inorganic sulfur-containing compounds in coal flotation which comprises subjecting raw coal, which contains inorganic sulfur-containing …

Removal of Iron from Pyrite-Rich Coal Refuse by …

Because framboidal pyrite is fine-grained, and pyrites exhibit paramagnetic properties, traditional separation methods have very little applicability. This work aims to characterize the pyrite present in coarse coal refuse from a bitumi-nous coal source, which is a potential feedstock for REE extraction and has over 250 ppm of REEs.

Polysaccharides-based pyrite depressants for green flotation separation …

In froth flotation separation, the first use of polysaccharides dates back to 1928 and has continued up to now [34].Although several polysaccharides have been recently synthesized and extensively used for pyrite depression in different mineral processing plants, no comprehensive review article has universally explored their …