pyrite effects of coal mining

Pyrite Effects Of Coal Mining

Beneficiation of pyrite from coal mining - ScienceDirect

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.

Negative Effects of Coal Mining - The World Counts

The effects of mining coal on the environment. There are 2 ways to mine coal – Strip Mining and Underground Mining – both ways have their own impact to the environment and health. We know it but coal is such a cheap energy source that we don’t want to let go of it. The negative effects of coal mining cannot be disputed:

Pyrite problems in the coal mining industry.

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.

(PDF) Effects of pyrite on the spontaneous combustion of coal

Effects of pyrite on the spontaneous combustion of coal. ... pyrite in coal inhibited positive effects on ... field of the 1105 co-mining face of coal and oil shale in the goaf of the Liangjia ...

Effects of pyrite on the spontaneous combustion of coal ...

Sep 28, 2015 · Three forms of sulfur exist in coal: pyrite, sulfate and organic sulfur (Lu and Liu 1999).Pyrite plays a vital role in coal spontaneous combustion. The specific heat of pyrite is only one-third of that of coal; but with the same heat absorption, the temperature rise of pyrite is three times higher when compared to coal.

Pyrite - Wikipedia

Pyrite is usually found associated with other sulfides or oxides in quartz veins, sedimentary rock, and metamorphic rock, as well as in coal beds and as a replacement mineral in fossils, but has also been identified in the sclerites of scaly-foot gastropods. Despite being nicknamed fools gold, pyrite is sometimes found in association with small quantities of gold.

Effect of coal mine waters of variable pH ... - SpringerLink

Disruption of coal strata during mining accelerates pyrite oxidation by exposing greater surface areas of the reactive mineral to weathering. Acidic water in a coal mine in the Niangziguan spring watershed is related to this process and is characterized by low pH (min. 2.52) and high sulfate (max. 4100 mg/I), iron (max. 257 mg/I), and hardness ...

Effects of pyrite on the spontaneous combustion of coal

Effects of pyrite on the spontaneous combustion of coal ... the mining of sulfur content coal seams has been significantly increased. Therefore, study of the effects of the sulfur on coal spon- ... pyrite in coal inhibited positive effects on coal spontaneous combustion in situ where the moisture of coal is proper.

Coal Mining and the Environment | WCA

By carefully pre-planning projects, implementing pollution control measures, monitoring the effects of mining and rehabilitating mined areas, the coal industry minimises the impact of its activities on the neighbouring community, the immediate environment and on long-term land capability.

Effects of Various Gas Atmospheres on the Oxidation of ...

The overall objective of this project was to determine the effect of various gas atmospheres on the oxidation of coal mine pyrite so that guidelines for field application of this technique can be set. Specifically, this study was designed to answer the follow- ing questions: 1.

Frequency Distribution of the pH of Coal-Mine Drainage in ...

The pH of coal-mine drainage in Pennsylvania has a bimodal frequency distribution, with modes at pH 2.5 to 4 (acidic) and pH 6 to 7 (near neutral). Although iron-disulfide and calcareous minerals comprise only a few percent, or less, of the coal-bearing rock, these minerals are highly reactive and are mainly responsible for the bimodal pH ...

pyrite pyrite effects of coal mining - denderbrass.be

Role of pyrite in formation of hydroxyl radicals in coal , 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 (FeS 2), a common inorganic component in coal, has been ...

Acid mine drainage - Wikipedia

Sub-surface mining often progresses below the water table, so water must be constantly pumped out of the mine in order to prevent flooding.When a mine is abandoned, the pumping ceases, and water floods the mine. This introduction of water is the initial step in most acid rock drainage situations.

Role of pyrite in formation of hydroxyl radicals in coal ...

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 (FeS 2), a common inorganic component in coal, has been shown to ...

Mining Impact -Safety and Health Issues in Minings ...

Coal mining causes a number of damaging effects. When coal surfaces are bare, pyrite also known as fools gold, comes in contact with irrigate and air and forms sulfuric acid. As water drains from the mine, the acid moves into the waterways, and as long as rain falls on the mine tailings the sulfuric acid manufacture continues, whether the mine ...

Investigating the influence of reactive pyrite on coal ...

bituminous coal with sulphur contents ranging from 0.62% to 17.95% that show the effect of increasing pyrite content on coal self-heating rates. 1 B3 Mining Services Pty Ltd, Kenmore QLD 4069, Email: [email protected], M: 0488 708 949 2 The University of Queensland, School of Mechanical and Mining Engineering, Brisbane QLD 4072

Forms of Pollution

This includes the mining of coal, copper, gold, silver, zinc, lead, and uranium. The mineral pyrite, more commonly known as "fools gold," is iron disulfide (FeS 2). Pyrite is one of the most important sulfides found in the waste rock of mines. When exposed to water and oxygen, it can react to form sulfuric acid (H 2 SO 4). The following ...

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