The Mining-Geology-Petroleum Engineering Bulletin and the authors ©, 2019, pp. 1-12, DOI: 10.1177/rgn.2019.3.1 3 The simultaneous effect of moisture and pyrite on coal spontaneous combustion using CPT and R70 test methods Table 1: The most famous and important studies about the effect of moisture and pyrite during coal spontaneous combustion ...
2020-1-5 · 3 The simultaneous eff ect of moisture and pyrite on coal spontaneous combustion using CPT and R70 test methods The Mining-Geology-Petroleum Engineering Bulletin and the authors ©, 2019, pp. 1-12, DOI: 10.1177/rgn.2019.3.1 (1) (Weise et al., 1987)(2) (Beamish et al., 2012)(3) (Arisoy and Beamish, 2015)(4) (Deng et al., 2015)The above equations suggest that oxygen and mois-
2017-8-26 · prevalence of lung disease varies by mining region and may, in part, be related to regional differences in the bioavailable iron content of the coal. Pyrite (FeS 2), a common inorganic component in coal, has been shown to spontaneously form reactive oxygen species (ROS) (i.e., hydrogen peroxide and hydroxyl radicals) and degrade nucleic acids.
An abundant mineral in nature and despite its potential as raw material for different segments of industry, when it comes from coal mining, pyrite (FeS2) is treated as waste, and its disposal ...
2018-4-17 · Abstract: Pyrite, a mineral that can cause potential environmental issues in coal mining, is commonly found in coal seams around intrusions. In this paper, pyrites from the Yuandian Coal Mine (Huaibei Coalfield, Anhui, Eastern China) were studied using SEM, Raman and LA-ICP-MS. The pyrite
2017-6-17 · Pyrite occurs in ore bodies and coal strata as enhedral crystals, coarse-grained (greater than 25-micrometer) masses which replaced original plant matter, coarse-grained platy masses occupying joints in the strata, and framboidal clusters of spheres of pyrite measuring about 0.25 micrometer in diameter and finely disseminated throughout the ore ...
2014-4-1 · Pyrite is unstable and oxidizes easily, which is an issue in controlling acid mine drainage. 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 …
2008-10-29 · Key words: pyrite oxidation, acid mine drainage, coal washing plant, coal waste dump, Alborz-Sharghi, heavy metals Introduction Iran is the main coal producer in the Middle East. Coal mines have made a considerable contribution to Iranian mining industry and the national economy. Alborz Sharghi is a major coal company in
2015-9-28 · Pyrite has a significant effect on the spontaneous combustion of coal. The presence of pyrite can change the propensity of coal towards spontaneous …
2010-2-3 · Acid mine drainage (AMD) pollution is considered to be the most serious water pollution problem in mining areas. AMD containing iron sulfates and other components can affect the receiving water bodies. Pyrite oxidation and AMD generation can be considered as important processes that may take place in the wastes produced by coal mining and coal washing operations in the Golestan …
2020-6-10 · Pyrite is an iron sulfide mineral which forms with coal deposits and readily weathers in the presence of water and air (Madigan et al., 2000). At many mine sites the presence of pyrite causes a major environmental problem known as acid mine drainage. Bacteria contribute to the problem by utilizing an electron from ferrous iron retrieved
2019-10-15 · The coal mining waste consist of three fractions, rich in pyrite, rich in clay minerals and rich in carbon addition to iron and sulfur, the XRF chemical analysis (), in agreement with the X-ray diffractogram (Fig. 1a), shows that coarse pyrite has quartz (SiO 2) and calcite contamination (CaCO 3, which decomposes into CaO + CO 2) and the other oxides of clay minerals origin (such as Al 2 O 3).
The coal mining industry has long used separation methods employing dense media for the reduction of pyrite content of coal. U.S. Pat. No. 3,768,988 describes a process which uses aqueous ferric sulfate or chloride to oxidize pyritic sulfur in coal to elemental sulfur which is then removed by solid extraction.
2021-8-26 · Coal mining adversely affects the eco-system as a whole. On the unstable earth, the un-resting mankind constantly uses a variety of resources for daily lives.
2019-7-8 · Coal mining produces large amounts of wastes rich in pyrite (FeS 2), which in contact with water, oxygen and bacteria generate acid mine drainage (AMD). Due to its composition and the major environmental problem caused by the AMD, the objective of this work was the production of the coagulant ferric sulfate (Fe 2 (SO 4) 3) from the oxidation of
The coal has been mined from open pits and galleries. Only a mine adit (named Mina 07, which will be replaced by a new mine adit in the next years) is in operation at present, producing ca. 97,000 t year–1 and generating ca. 620 t of tailings daily (V.P. Campaner and A. Spoladore, unpublished data). The pyrite-rich coal layers are up to 0.5 m ...
Pyrite (FeS2) Review the most abundant and widely spread Iron-containing sulfide mineral in the earth, and it is also an important source of sulfuric acid (H2SO4) and is commonly associated with ...
2021-1-14 · Grindability of Pyrite and Coal-An Aid in Separation. Figure 7 demonstrates the behavior of coal and pyritic material when subjected to two types of grinding action. The materials used in this test had been previously sized to 16 by 30 mesh, then cleaned by the float-sink separation (the coal floated at 1.6 sp gr, and the pyritic materials sank ...
2021-11-1 · 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 …
2021-10-18 · In a coal mine, pyrite degradation may occur in the self-accelerating cycle identified in Table. 4.1 with pyrite being oxidized by ferric iron. Of the two ferric iron-producing equations shown in Table 4.1 (Equations 1 and 2), only ferrous iron oxidation is a significant source of ferric iron. Assuming that influent mine waters have an average ...
2006-12-19 · The harmful effects from inhalation of coal dust are well-documented. The prevalence of lung disease varies by mining region and may, in part, be related to regional differences in the bioavailable iron content of the coal. Pyrite (FeS2), a common inorganic component in coal, has been shown to spontaneously form reactive oxygen species (ROS) (i.e., hydrogen peroxide and hydroxyl …
Pyrite (iron disulfide - FeS 2) is the most abundant sulfide in the mineral coal composition and the main one responsible for the generation of gases containing …
An abundant mineral in nature and despite its potential as raw material for different segments of industry, when it comes from coal mining, pyrite (FeS 2) is treated as waste, and its disposal culminates in environmental problems for the coalfields creasing the purity of pyritic tailings, increasing its iron disulfide content, strengthen the possibility of turning it into a value-added by ...
2019-9-17 · 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 (S 2), which ...
Beneficiation of pyrite from coal mining - ScienceDirect
2016-7-31 · 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 ...
2016-12-15 · The 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.
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).
2021-4-14 · Coal characteristics Physical and chemical properties. With the exception of sample J, which consisted of concentrated pyrite associated with a non-coal band of the coal seam, all samples were ...
2021-1-26 · To discuss the hydrochemical evolution characteristics of the mining process of Peigou Coal Mine, based on the test results of 43 water samples collected at different times from three main discharge aquifers, namely, Carboniferous Taiyuan Formation limestone water (L7–8 + L5–6 water), Ordovician limestone water (including Taiyuan Formation L1–4), and Permian main mining coal seam roof ...
2012-6-6 · polluted by AMD, primarily from coal mining. To these ends, acidity is defined, and rates and mechanisms of acidity generation and consumption in tailings, dumps, aquifers, surface waters, and sediments are discussed. Some emphasis is placed on case studies from coal mining regions in Eastern Germany; however, the
1990-2-1 · Cyclic voltammetry (CV), flotation response, evolved-gas analysis (EGA), and X-ray photoelectron spectroscopy (XPS) were employed to evaluate the major differences in the surface property and surface reactivity of a selected coal pyrite and a mineral pyrite. Surface properties of pyrite were evaluated in terms of flotation response in the presence of both an anionic fluorosurfactant and …
Pyrite, a mineral that can cause potential environmental issues in coal mining, is commonly found in coal seams around intrusions. In this paper, pyrites from the Yuandian Coal Mine (Huaibei Coalfield, Anhui, Eastern China) were studied using SEM, Raman …
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