coal processing pyrite
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coal processing pyrite

Suppression of floatability of pyrite in coal processing ...

2011-5-1  1. Introduction. Pyrite, FeS 2, is one of the most abundant minerals, yet economically insignificant and less desirable.It is a common gangue mineral in coal, and causes SO 2 emissions during coal combustion. SO 2 is one of the main constituents for acid rain formation therefore the separation of pyrite from coal before combustion is environmentally important , .

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Application of Image Processing for Modelling Pyrite ...

2012-11-22  In this paper, an image processing method was applied to model the pyrite oxidation in the wastes of the Alborz Sharghi coal washing plant waste pile, northeast Iran. Pictures of polished sections created from the powdered samples of coal wastes were used to determine the amount of pyrite that remained at different depths of the waste pile. The amount of pyrite in the

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How to Remove Pyrite from Coal - 911 Metallurgist

2021-1-14  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. Removing 50 to 70 pct of the pyrite would accomplish only a 25- to 35-pct reduction in SO2 ...

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Mining Free Full-Text An Autochthonous ...

2021-10-5  Pyrite bio-oxidation by chemolithotrophic acidophile bacteria has been applied in the mining industry to bioleach metals or to remove pyritic sulfur from coal. In this process, it is desirable to use autochthonous and already adapted bacteria isolated directly from the mining sites where biomining will be applied. Bacteria present in the remnant solution from a mining

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Minerals Free Full-Text Effects of Pyrite Texture on ...

2021-10-18  Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance.

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US3926575A - Removal of pyritic sulfur from coal - Google ...

Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid (the oxidizing agent); if desired, HCl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations: Primary: Oxidation - reduction 4 FeS2 (pyrite) +3SO2 + 12 HCl -> 4 FeCl3 + 11S + 6 H2O Secondary: Oxidation - reduction 4 FeCl3

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Pyrite depressant useful in flotation separation ...

1997-6-17  We claim: 1. A process for separating pyrite from sulfide ores and coal which comprises subjecting said sulfide ore or coal containing said pyrite to flotation in the presence of a depressant for pyrite, said depressant comprises about 0.125 to 1.250 pounds per ton of 2-S thiouronium-ethane sulfonate.

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Coal Processing - an overview ScienceDirect Topics

1982-8-9  Describing and eliminating the health hazards of coal processing requires an understanding of the nature of the raw materials, products, by-products, the type of pollutants produced, the design of the plant and its operating methods (Wadden, 1976).The structure of coal was described in Chapter 6 and is thought to be a highly linked amorphous polymer consisting

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10.1016/j.fuproc.2010.12.028 DeepDyve

2020-6-11  SO 2 is one of the main constituents for acid rain formation therefore the separation of pyrite from coal before combustion is environmentally important [1,2] . Dense media separation, cyclones, jigs, and froth flotation are some of the existing techniques for coal processing [3] .

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Flotation behavior of pyrite in sub-bituminous and meta ...

2019-5-1  1. Introduction. Sulfur is present in natural coal either as organic and inorganic form. Pyrite is one of the most common gangue minerals that introduces inorganic sulfur into coal [1,2].The existence of pyrite results in the emission of SO 2 during coal combustion which in turn leads to acid rain [, , ].In addition, the pyrite disposed as tailings is the main cause of acid mine drainage.

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Application of Image Processing for Modelling Pyrite ...

2012-11-22  In this paper, an image processing method was applied to model the pyrite oxidation in the wastes of the Alborz Sharghi coal washing plant waste pile, northeast Iran. Pictures of polished sections created from the powdered samples of coal wastes were used to determine the amount of pyrite that remained at different depths of the waste pile. The amount of pyrite in the same samples also ...

Read More
(PDF) Electrostatic Separation of Pyrite From Coal

The electrostatic separation of pyrite from coal using corona roll separator was conducted on Moira Pottery coal, UK, at various atmospheric conditions, various feed pretreatment, particle size ...

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NIOSHTIC-2 Publications Search - 10008981 - Removal of ...

The difficulties associated with wet-processing fine size coal led the Bureau of Mines to investigate a dry process for removing pyrite from coal pulverized to powerplant fineness. The dry process that was investigated consists of two cleaning steps: first, centrifugal separation is used to remove a fine, pyrite-depleted portion as a product; second, the remaining coarser, pyrite-enriched portio

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Comparison Analysis of Coal Biodesulfurization and Coal's ...

2013-10-27  Acidithiobacillus ferrooxidans (A. ferrooxidans) was applied in coal biodesulfurization and coal's pyrite bioleaching.The result showed that A. ferrooxidans had significantly promoted the biodesulfurization of coal and bioleaching of coal's pyrite. After 16 days of processing, the total sulfur removal rate of coal was 50.6%, and among them the removal of pyritic sulfur was up to 69.9%.

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US3926575A - Removal of pyritic sulfur from coal - Google ...

Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid (the oxidizing agent); if desired, HCl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations: Primary: Oxidation - reduction 4 FeS2 (pyrite) +3SO2 + 12 HCl -> 4 FeCl3 + 11S + 6 H2O Secondary: Oxidation - reduction 4 FeCl3 + FeS2 ...

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Pyrite depressant useful in flotation separation ...

1997-6-17  We claim: 1. A process for separating pyrite from sulfide ores and coal which comprises subjecting said sulfide ore or coal containing said pyrite to flotation in the presence of a depressant for pyrite, said depressant comprises about 0.125 to 1.250 pounds per ton of

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allmineral – clean coal processing allmineral ...

Coal: ideal processing with allmineral technology. Sticky coal features a high clay content and makes sorting more difficult. Other forms of coal with high HGIs generate lots of extremely fine grains, which are expensive to process and can only be sold at low prices.

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(PDF) Coal Gasification (chapter only) - ResearchGate

Coal gasification is the process of reacting coal with oxygen, steam, and carbon dioxide to form a product gas containing hydrogen and carbon monoxide. Gasifi-

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10.1016/j.fuproc.2010.12.028 DeepDyve

2020-6-11  SO 2 is one of the main constituents for acid rain formation therefore the separation of pyrite from coal before combustion is environmentally important [1,2] . Dense media separation, cyclones, jigs, and froth flotation are some of the existing techniques for coal processing [3] .

Read More
Application of Image Processing for Modelling Pyrite ...

2012-11-22  In this paper, an image processing method was applied to model the pyrite oxidation in the wastes of the Alborz Sharghi coal washing plant waste pile, northeast Iran. Pictures of polished sections created from the powdered samples of coal wastes were used to determine the amount of pyrite that remained at different depths of the waste pile. The amount of pyrite in the same samples also ...

Read More
Flotation behavior of pyrite in sub-bituminous and meta ...

2019-5-1  1. Introduction. Sulfur is present in natural coal either as organic and inorganic form. Pyrite is one of the most common gangue minerals that introduces inorganic sulfur into coal [1,2].The existence of pyrite results in the emission of SO 2 during coal combustion which in turn leads to acid rain [, , ].In addition, the pyrite disposed as tailings is the main cause of acid mine drainage.

Read More
(PDF) Electrostatic Separation of Pyrite From Coal

The electrostatic separation of pyrite from coal using corona roll separator was conducted on Moira Pottery coal, UK, at various atmospheric conditions, various feed pretreatment, particle size ...

Read More
NIOSHTIC-2 Publications Search - 10008981 - Removal of ...

The difficulties associated with wet-processing fine size coal led the Bureau of Mines to investigate a dry process for removing pyrite from coal pulverized to powerplant fineness. The dry process that was investigated consists of two cleaning steps: first, centrifugal separation is used to remove a fine, pyrite-depleted portion as a product; second, the remaining coarser, pyrite-enriched portio

Read More
Pyrite depressant useful in flotation separation ...

1997-6-17  We claim: 1. A process for separating pyrite from sulfide ores and coal which comprises subjecting said sulfide ore or coal containing said pyrite to flotation in the presence of a depressant for pyrite, said depressant comprises about 0.125 to 1.250 pounds per ton of

Read More
Pyrite transformation and sulfur dioxide release during ...

Calcination is a typical process associated with the utilization of coal gangue. A concern associated with this procedure is the emission of sulfur dioxide (SO 2).In this work, the behavior of SO 2 release during coal gangue calcination under an air atmosphere were systematically investigated and compared to the characteristics of SO 2 evolution from pure pyrite calcination.

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磨矿和浮选过程中黄铁矿电化学行为的研究进展

2020-6-29  《工程科学学报》(Chinese Journal of Engineering)是由教育部主管、北京科技大学主办的学术类科技期刊,ISSN 2095-9389, CN 10-1297/TF,月刊,国内外公开发行,主要刊载工学领域的具有创新意义或有较大应用价值的高水平研究论文。

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白宗庆-中国科学院大学-UCAS

(30) Effect of coal particle size on distribution and thermal behavior of pyrite during pyrolysis, Fuel, 2015, 通讯作者 (31) Effect of Ca2 + species with different modes of occurrence on direct liquefaction of a calcium-rich lignite, Fuel Processing Technology, 2015, 通讯作者

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(PDF) Coal Gasification (chapter only) - ResearchGate

Coal gasification is the process of reacting coal with oxygen, steam, and carbon dioxide to form a product gas containing hydrogen and carbon monoxide. Gasifi-

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