• Environmental Problems Related to Pyrite Oxidation

    2008 10 29 the pyrite oxidation process will continue to release acid and elevated concentrations of heavy metals and sulphate to the surface and groundwater flow systems for many more decades Key words pyrite oxidation acid mine drainage coal washing plant coal waste dump Alborz Sharghi heavy metals Introduction

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  • Effect of Environment Oxidation and Dissolved Metal

    2003 3 6 Cleaning of coal has gained much more importance recently as a result of the increasing environmental concerns and the resultant requirements to provide cleaner coal for subsequent processing Coal cleaning processes have resulted in the generation of more and more finer particles as the removal of pyrite and mineral matter requires finer grinding

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  • Removal of pyrite from coal using bacteria

    Removal of pyrite from coal using bacteria article Beier1985RemovalOP title= Removal of pyrite from coal using bacteria author= E Beier journal= Coal science and technology year= 1985 volume= 9 pages= 653 672 Abstract European work on the application of biotechnology to processing various coals is reviewed and set within a

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  • Removal of pyrite from coal using bacteria

    Removal of pyrite from coal using bacteria article Beier1985RemovalOP title= Removal of pyrite from coal using bacteria author= E Beier journal= Coal science and technology year= 1985 volume= 9 pages= 653 672 Abstract European work on the application of biotechnology to processing various coals is reviewed and set within a

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  • Study on Mineral Processing Technology of Coal Pyrite in

    Study on Mineral Processing Technology of Coal Pyrite in Yunnan Article Preview Abstract Based on the analysis of the properties of a high carbon pyrite from Yunnan a series tests on gravity concentration and flotation were carried out According to this basis a closed circuit flotation test scheme was worked out which obtained a fine

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  • Dry separation of pyrite from coal

    Dry separation of pyrite from coal Centrifugal and electrostatic methods restriction of particle size range benefits both methods pyrite particles should be as large as possible

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  • Study on Mineral Processing Technology of Coal Pyrite in

    Based on the analysis of the properties of a high carbon pyrite from Yunnan a series tests on gravity concentration and flotation were carried out According to this basis a closed circuit flotation test scheme was worked out which obtained a fine quality pyrite concentrate with a sulfur grade of 38 24 comprehensive sulfur recovery of 70 87 and carbon content of only 0 87

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  • Fine Coal Desulfurization by Magnetic Separation and the

    2014 12 31 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 microwave energy intensive process

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  • Assessing the reactivity of pyrite

    2018 4 18 Coal Operators Conference The University of Wollongong 8 10 February 2017 391 ASSESSING THE REACTIVITY OF PYRITE Basil Beamish1 and Jan Theiler2 ABSTRACT The presence of pyrite in coal has often been attributed to being a factor in spontaneous combustion but quantifying the effect has been problematical from a hazard assessment viewpoint

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  • Process for cleaning of coal and separation of mineral

    A flotation process is disclosed for cleaning of particulate coal and separation therefrom of pyrite and ash A flotation pulp is prepared comprising a particulate coal feed material and an anionic surfactant selected from among alkanesulfonic acids alkenesulfonic acids alkynesulfonic acids arenesulfonic acids alkyl sulfuric acids alkenyl sulfuric acids alkynyl sulfuric acids aryl

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  • Pyrite depressants useful in the separation of pyrite from

    13 The process of claim 1 wherein the coal flotation process is performed at a pH of about 8 0 14 The process of claim 1 wherein the sulfur containing compound is pyrite 15 The process of claim 2 wherein the coal is size reduced to be at least about 90 percent of

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  • USA

    A flotation process is disclosed for cleaning of particulate coal and separation therefrom of pyrite and ash A flotation pulp is prepared comprising a particulate coal feed material and an anionic surfactant selected from among alkanesulfonic acids alkenesulfonic acids alkynesulfonic acids arenesulfonic acids alkyl sulfuric acids alkenyl sulfuric acids alkynyl sulfuric acids aryl

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  • Environmental Problems Related to Pyrite Oxidation

    2008 10 29 the pyrite oxidation process will continue to release acid and elevated concentrations of heavy metals and sulphate to the surface and groundwater flow systems for many more decades Key words pyrite oxidation acid mine drainage coal washing plant coal waste dump Alborz Sharghi heavy metals Introduction

    Get Price
  • Pyrite Manufacturers Suppliers China pyrite

    pyrite manufacturer/supplier China pyrite manufacturer factory list find qualified Chinese pyrite manufacturers suppliers factories exporters wholesalers quickly on Made in China

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  • Analysis of surface modification on coal pyrite

    2009 8 27 The distribution of coal pyrite in coal is relatively complex and it is therefore impossible to reach ideal separation efficiency by means of a common flotation technique The key factor affecting the separation between coal and pyrite is that the hydrophilic surface of pyrite became hydrophobic after oxidation The hydrophobic oxidation products

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  • Study on Mineral Processing Technology of Coal Pyrite in

    Study on Mineral Processing Technology of Coal Pyrite in Yunnan Article Preview Abstract Based on the analysis of the properties of a high carbon pyrite from Yunnan a series tests on gravity concentration and flotation were carried out According to this basis a closed circuit flotation test scheme was worked out which obtained a fine

    Get Price
  • 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 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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  • Pyrite depressants useful in the separation of pyrite from

    14 The process of claim 1 wherein the coal flotation is carried out at the natural pH of the raw coal feed 15 The process of claim 1 wherein the coal flotation is carried out at a pH of about 8 0 16 The process of claim 1 wherein the raw coal is size reduced to at least about 10 percent of the particle smaller than 75 micrometers 17

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  • How many cleavage does pyrite have SidmartinBio

    2019 2 27 How many cleavage does pyrite have P yrite does not show cleavage It is dense with specific gravity of approximately 5 and its scratch hardness is 6 6 5 Pyrite is found in small amounts all over the state in many different rock types It is most abundant in coal beds of southwestern Indiana

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  • AQUEOUS BIPHASE EXTRACTION FOR PROCESSING OF

    2020 1 12 of fine coal particles as well as model fine inorganic particles in aqueous biphase systems In the polyethylene glycol PEG /salt/H2O system it was found that pyrite partition was highly dependent upon pH conditions at high pH the particles preferred the salt rich bottom phase while they moved to the polymer rich top phase at low pH This

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  • Dry separation of pyrite from coal

    2021 10 8 A dry separation process for removing pyrite from fine coal utilizing centrifugal and electrostatic methods removed 35 to 55 percent of the total pyritic sulfur amounting to 70 to 100 percent of available pyritic sulfur in rejects of 10 to 15 percent Both separation methods are benefited by restricting the particle size range and by keeping the pyrite particles as large as possible

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  • Probabilistic Prediction of Acid Mine Drainage

    2021 11 2 Coal waste 1 Introduction The pyrite oxidation process commonly results from the coal metal waste and tailing particles Some of the critical factors such as O 2 Fe3 ions temperature pH Eh and presence or absence of bacteria which can affect this process have been studied in the comprehensive studies for several decades

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  • Improved strategies for processing fine coal streams

    For example field studies indicate that the froth flotation process which is normally used to treat minus 0 2 mm fine coal often recovers less than 65 to 70 of the organic matter in this size range Fine coal separation processes are also inherently less effective in removing pyrite than that

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  • Valorization of waste from coal mining pyrite

    2021 8 1 The coal mining industries generate a considerable volume of pyrite rich tailings FeS 2 However pyrite waste is potentially reusable Therefore this study aimed to evaluate possible ways of waste and effluent valorization that are generated during the processing of coal mining pyrite R1

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  • Analysis of surface modification on coal pyrite

    2009 8 27 The distribution of coal pyrite in coal is relatively complex and it is therefore impossible to reach ideal separation efficiency by means of a common flotation technique The key factor affecting the separation between coal and pyrite is that the hydrophilic surface of pyrite became hydrophobic after oxidation The hydrophobic oxidation products

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  • Bioprocessing of pyrite concentrate from coal tailings for

    The leaching experiments were carried out using a pyrite con E mail addresses angelilling ufrgs br A V Colling jean menezes ufrgs br centrate obtained by gravimetric processing of a coal tailing rich Jean Carlo Salomé dos Santos Menezes ivo andre ufrgs br I A H Schneider

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  • Environmental impacts of coal

    2021 11 3 Acid mine drainage AMD refers to the outflow of acidic water from coal or metal mines often abandoned ones where ore or coal mining activities have exposed rocks containing the sulphur bearing mineral pyrite Pyrite reacts with air and water to form sulphuric acid and dissolved iron and as water washes through mines this compound forms a dilute acid which can wash into nearby rivers

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  • Pyrite The Real Story Behind Fool s Gold

    2014 4 1 Pyrite is a widespread natural source of arsenic which can leach into ground water aquifers when geologic strata containing pyrite are exposed to the air and water during coal mining for example Acid mine drainage and groundwater contamination requires close monitoring to ensure that it has been neutralized before being returned to the earth

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  • Beneficiation of pyrite from coal mining

    2016 12 15 1 Introduction Pyrite a mineral with a chemical formula of FeS 2 is an iron disulfide which is usually associated with other sulfides and oxides is abundant in the earth s surface being found in the composition of sedimentary and metamorphic rocks in coal beds and as a replacement mineral in fossils Klein and Hurlbut 1993 There are occurrences of high crystallinity pyrite in the

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  • Effect of Pyrite Ore in Direct Coal Liquefaction Process

    2020 6 4 The catalytic activity of pyrite ore from coal mining was studied in the direct liquefaction process of high volatile bituminous coal from the south of Brazil The process consisted of mixing pulverized coal with tetralin in the presence of catalyst It was possible to obtain fractions of preasphaltenes asphaltenes and oils

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  • Characterisation of coal fines using automated scanning

    2021 6 29 A coal sorting process produced the discarded material Kaolinite coal and quartz are significant constituents however elevated levels of pyrite 13 5 mass are also present Kaolinite generally occurs as coatings on coal surfaces and could be removed with an attrition scrubber Table 1 Modal analysis of a coal discard sample

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  • Arsenic in Coal

    2006 3 28 Iron sulfides such as pyrite and marcasite are common inorganic con stituents of coal composing anywhere from a negligible amount to about 5 percent by weight Other than iron and sulfur arsenic is generally the most abundant element in pyrite and marcasite but its concentration is highly variable fig 2 In bituminous coals pyrite generally

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  • Effects of organic sulfur on oxidation spontaneous

    2021 10 5 Research on the spontaneous combustion of coal caused by sulfur has always been focused on pyrite in coal but has rarely considered the influence of organic sulfur In this paper coal samples rather than model compounds were used to study the influence of organic sulfur content in coal on its spontaneous combustion process

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  • Phase Transformation and Dissolution Behavior of Pyrite in

    The selective leaching of vanadium and iron has been one of the main concerns in the field of vanadium recovery from stone coal but the source of iron ions and their release characteristics were still unclear In this work the dissolution of pyrite and its roasted product under conditions in accordance with the vanadium leaching process from stone coal by blank roasting acid leaching were

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  • Assessing the reactivity of pyrite

    2018 4 18 Coal Operators Conference The University of Wollongong 8 10 February 2017 391 ASSESSING THE REACTIVITY OF PYRITE Basil Beamish1 and Jan Theiler2 ABSTRACT The presence of pyrite in coal has often been attributed to being a factor in spontaneous combustion but quantifying the effect has been problematical from a hazard assessment viewpoint

    Get Price
  • Environmental Problems Related to Pyrite Oxidation

    2008 10 29 the pyrite oxidation process will continue to release acid and elevated concentrations of heavy metals and sulphate to the surface and groundwater flow systems for many more decades Key words pyrite oxidation acid mine drainage coal washing plant coal waste dump Alborz Sharghi heavy metals Introduction

    Get Price
  • Suppression of floatability of pyrite in coal processing

    Request PDF Suppression of floatability of pyrite in coal processing by carrier microencapsulation Carrier microencapsulation CME is a technique to form a thin layer of metal oxide or

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  • Dry separation of pyrite from coal

    Sulfur dioxide emissions from coal burning power plants can be significantly lowered by removing pyrite from the coal prior to buming Conventional wet washing methods remove pyrite down to fine size however because of difficulties associated with wet processing of fine size coal dry removal methods offer an attractive alternate

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  • Ferric Sulphate Produced From Pyrite Concentrate of

    2019 7 8 can be substantial in the bio processing of coal tailings for the production of ferric coagulants However the leaching process of the pyrite can dissolve undesirable elements present in the sedimentary rock associated to the coal tailings The aim of this work was to produce a

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  • How many cleavage does pyrite have SidmartinBio

    2019 2 27 How many cleavage does pyrite have P yrite does not show cleavage It is dense with specific gravity of approximately 5 and its scratch hardness is 6 6 5 Pyrite is found in small amounts all over the state in many different rock types It is most abundant in coal beds of southwestern Indiana

    Get Price