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Coal Mining And Pyrite

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amrclearinghouse :::AMD Basics

2006-11-15The mineral pyrite (FeS 2) and other sulfur containing minerals are common. Also common is the occurrence of these minerals in the geologic strata in the vicinity of coal seams. Mining coal inevitably involves exposing these pyritic materials to oxygen and water. In deep mines, these materials are exposed in the voids created by the mining process.

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Valorization of iron pyrite from coal mining in

2019-2-1R1 pyrite waste from coal mining in its raw form contains traces of ferrous sulfate (a product of the pyrite reaction with oxygen and water), quartz, calcite, material rich in carbon and leachable heavy metals, such as lead. The increase in pyrite concentration upon reducing the concentration of these impurities helps make the waste material

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Coal

Coal - Coal - Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic

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pyrite mining quality

The presence of pyrite (FeS2) in coal can cause or contribute to several problems for the coal mining industry. These problems, which include spontaneous combustion, roof falls, floor heave, and accidental explosions in coal surface mining when ammonium nitrate fuel oil (ANFO) explosives are used, result from pyrite oxidation.

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Effect of Pyrite Ore in Direct Coal Liquefaction Process

2020-8-4The 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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Coal workers' pneumoconiosis

Chemical analysis determination of pyritic sulfur content is only a broad brush indicator as it does not distinguish between reactive and unreactive pyrite. Therefore it is necessary to supplement this information with visual examination at both the exploration and mining stages of coal mining

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Purification Route of Pyrite from Coal Mining

Pyrite, mineral largely found in nature, is considered a solid waste when is obtained from the coal mining. However, can be precursor of products like: sulphur, sulphuric acid, hematite, sulphur dioxide, fertilizers and iron sulfates. Several studies also point it property of semiconduction and it use in solar cells. Increase it purity level is important for transforming it in products with

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Iron ore and ochre mines

Iron ore is most commonly found as haematite (Fe 2 O 3), pyrite (FeS 2) and goethite (FeO.OH), or as a mixture of hydrated iron oxides known as limonite.In the Mendips, haematite and goethite commonly occur together as either massive, granular, often siliceous masses, or as altered, amorphous, loosely compacted, earthy varieties known as ochre.

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(DOC) IMPACTS OF COAL MINING ON THE

It refers to outflow of acidic water from coal mines. Underground mining often takes place below the water table. So, water must be constantly pumped out of the mine in order to prevent flooding. Now in mines, where coal is having pyrite in abundance, pyrite comes in contact with water and forms sulfuric ion and iron.

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Negative Effects of Coal Mining

Acidic water can flow out of abandoned coal mines. Mining has xposed rocks which contain the sulphur-bearing mineral, Pyrite. This mineral reacts to air and water to form sulphuric acid. When it rains, the diluted acid gets into rivers and streams and can even seep into underground sources of

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Effects of pyrite on the spontaneous combustion of

Pyrite has a significant effect on the spontaneous combustion of coal. The presence of pyrite can change the propensity of coal towards spontaneous combustion. The influences of various pyrite contents on the parameters of spontaneous combustion, such as index gases, temperature and released heat etc., were investigated in this study. Coal samples with different pyrite contents

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Pyrite, Coal, Kentucky Geological Survey, University of

Pyrite (FeS 2) is the most common sulfide mineral in coal and a major source of the sulfur in coal.Pyrite can form in peat while the peat is accumulating, or can form in peats from the introduction of sulfate (SO 4) into the peat if the peat was buried by marine waters (such pyrite is called syngenetic or authigenic pyrite).Within the buried peat, the sulfate is reduced to sulfide

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Beneficiation of pyrite from coal mining

2016-12-15The pyrite from coal mining in southern Santa Catarina (Brazil) is rich in other ferrous compounds, sulfates and oxides according to the infrared spectra. The high silicon content, together with elements such as aluminum, calcium, potassium, magnesium, manganese and sodium, suggest that the material has a sandy and clay fraction.

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(PDF) ENVIRONMENTAL IMPACT OF COAL MINING

Impact of coal mining and coal based industrial activities on water quality of the Damodar river with special reference to heavy metals are described elsewhere (Tiwary et al., 1994). Mine water often con- tains high level of total dissolved solids in the range of 200–860 mg L−1 and may have negative effects on river water quality.

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Assessing the reactivity of pyrite

2020-10-13Coal 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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Search

The data is held in a database that can be searched by geographical area, mineral or mine name. The information returned includes mine name, mineral, geographical area, plan date (where available), whether a digital copy of the plan is available and who to contact to purchase copies of a scanned plan (contact enquiriesbgs.ac.uk or datasalescoal.gov.uk).

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Probabilistic prediction of acid mine drainage

In this paper, we investigate a probabilistic approach in order to predict how acid mine drainage is generated within coal waste particles in NE Iran. For this, a database is built based on the previous studies that have investigated the pyrite oxidation process within the oldest abandoned pile during the last decade. According to the available data, the remaining pyrite fraction is

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Coal

Coal - Coal - Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic

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Environmental Impact of Coal Mining on Water

Environmental Impact of Coal Mining on Water Regime and Its Management Tiwary, R. 2004-10-04 00:00:00 Coal mining is one of the core industries that contribute to the economic development of a country but deteriorate theenvironment. Being the primary source of energy coal has becomeessential to meet the energy demand of a country.

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Mining in Ireland

This period also witnessed the most important episode of coal mining, slate quarrying and pyrite production in Ireland. Today, Ireland is internationally renown as a major zinc-lead mining province. Over the last 40 years a string of significant base metal discoveries have been made, including the giant ore deposit at Navan (70Mt).

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amrclearinghouse :::AMD Basics

2006-11-15The mineral pyrite (FeS 2) and other sulfur containing minerals are common. Also common is the occurrence of these minerals in the geologic strata in the vicinity of coal seams. Mining coal inevitably involves exposing these pyritic materials to oxygen and water. In deep mines, these materials are exposed in the voids created by the mining process.

Get price

Coal

Coal - Coal - Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic

Get price

Introduction to Coal Mine Drainage

2018-11-17In addition to pyrite, other forms of sulphur that are commonly found in sedimentary strata are organic sulphur and sulphate sulphur. Organic sulphur can be present because it was part of the original make-up of the plant material; alternatively, it can represent sulphate that formed complexes with the decaying organic matter, and so became combined with the structure of the coal.

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COAL PREPARATION TECHNIQUES

Coal beneficiation plants use a variety of equipment to separate the lighter coal from the heavier rock and clayey materials and heavy media cyclones, jigs, tromp vessels, hydrocyclones, tables, and froth flotation are common. After the coal and waste material are separated, various cleaning, water-removal, and clarifying processes (e.g.. 47

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Minerals

The generation of enormous volumes of mine-tailing waste is standard practice in the mining industry. Large quantities of these tailings are also sources of kaolinite-rich materials that accumulate in slag heaps, causing significant environmental degradation and visual impacts on the landscape. The consequences of coal refuse dumped in slagheaps calls for the study of

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Comparison analysis of coal biodesulfurization and

2013-10-272.1. Strain Culture, Coal, and Coal's Pyrite Samples. A. ferrooxidans was isolated by our laboratory, and it was cultured in basal medium supplemented with 44.5 gL −1 ferrous sulfate. The pH of the medium was adjusted with 1 M sulfuric acid to 1.7. The A. ferrooxidans was cultured in 500 mL flasks containing 300 mL medium and incubated at 30C with shaking at

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Control of pyrite surface chemistry in physical coal

The presence of either frother or kerosene enhanced the flotability of coal and mineral pyrite with a corresponding decrease in induction time over the pH range examined. Scanning electron microscopy (SEM) results indicate a correlation exists between the sample surface morphology and crystal structure and the observed hydrophobicity.

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Frequency Distribution of the pH of Coal

2001-7-9that mining proceeded relative to the dip of the coal bed. In the past, most bituminous mines were mined updip so that water would drain freely and pumping costs would be minimized. Updip mines also pro-vided greater access of oxygen to the subsurface, however, which facilitates the oxidation of pyrite and the formation of AMD (Hornberger, 1985

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Purification Route of Pyrite from Coal Mining

Pyrite, mineral largely found in nature, is considered a solid waste when is obtained from the coal mining. However, can be precursor of products like: sulphur, sulphuric acid, hematite, sulphur dioxide, fertilizers and iron sulfates. Several studies also point it property of semiconduction and it use in solar cells. Increase it purity level is important for transforming it in products with

Get price

REAGENTS USED IN COAL PREPARATION. — Penn State

There is a broad range of chemical reagents of potential use to the coal preparation industry: flotation frothers, flotation collectors (for coal, ash minerals or pyrite) and collector-assisting (conditioning) agents, flotation depressants (for coal, ash minerals or pyrite), pH regulating agents, acid mine drainage treatment chemicals, flocculants, filtration aids, dispersants, dust

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Iron ore and ochre mines

Iron ore is most commonly found as haematite (Fe 2 O 3), pyrite (FeS 2) and goethite (FeO.OH), or as a mixture of hydrated iron oxides known as limonite.In the Mendips, haematite and goethite commonly occur together as either massive, granular, often siliceous masses, or as altered, amorphous, loosely compacted, earthy varieties known as ochre.

Get price

Clean Coal Desulfurization Pretreatment: Microwave

2020-1-14The throughput of pyrite extraction from coal using the conventional magnetic separation method can be effectively improved by increasing the magnetic susceptibility of pyrite. The electromagnetic characteristics and absorption response of fine high-sulfur coal were studied to evaluate the strengthening effect of microwave treatment on the magnetic susceptibility of pyrite

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Probabilistic prediction of acid mine drainage

In this paper, we investigate a probabilistic approach in order to predict how acid mine drainage is generated within coal waste particles in NE Iran. For this, a database is built based on the previous studies that have investigated the pyrite oxidation process within the oldest abandoned pile during the last decade. According to the available data, the remaining pyrite fraction is

Get price

Pyrite Oxidation Drives Exceptionally High

These coal mining activities will result in the liberation and oxidation of pyrite minerals, enhanced potential for strong acid weathering, the production of dissolved salts, and the release of geologically bound C. Unlocking geologically sequestered pyrite has important implications for global biogeochemical cycles of S, C, Ca, and Mg, whether

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