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Friday, July 24, 2020 | History

2 edition of Effects of water on coal cutting forces and primary dust distribution found in the catalog.

Effects of water on coal cutting forces and primary dust distribution

Wallace W. Roepke

Effects of water on coal cutting forces and primary dust distribution

by Wallace W. Roepke

  • 346 Want to read
  • 39 Currently reading

Published by U.S. Dept. of the Interior, Bureau of Mines in Pittsburgh, Pa. (P.O. Box 18070, Pittsburgh 15236) .
Written in English

    Subjects:
  • Coal-cutting bits -- Testing.,
  • Coal mines and mining -- Dust control.,
  • Water.

  • Edition Notes

    Bibliography: p. 8.

    Statementby Wallace W. Roepke and Theodore A. Myren.
    SeriesReport of investigations / Bureau of Mines ;, 8993, Report of investigations (United States. Bureau of Mines) ;, 8993.
    ContributionsMyren, Theodore A.
    Classifications
    LC ClassificationsTN23 .U43 no. 8993, TN813 .U43 no. 8993
    The Physical Object
    Pagination14 p. :
    Number of Pages14
    ID Numbers
    Open LibraryOL2663168M
    LC Control Number85600204

    Not long after the enactment of the Coal Mine Health and Safety Act, the U.S. Bureau of Mines (USBM) and others conducted extensive research into water spray and wet scrubber systems to control respirable dust in coal mines. The primary aspects of water spray dust control included prewetting for dust prevention, localized ventilation. An electrostatic precipitator (ESP) is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.. In contrast to wet scrubbers, which apply energy directly to the flowing fluid medium, an ESP applies energy only to the particulate matter being collected and.

    Coal Dust in Longwall Mining-A Toolbox U.S. Department of Labor rectly on the cutting drum to deliver water as close as possible to the primary point of dust generation. The most commonly used drum water spray system is pick-point flushing, which   The third type of dust collection system for coal fired power plants is the use of a cyclone as a point of use pre-filter. The cyclone will remove the majority of the coal dust from the airflow.

      For years, many miners who breathed in too much coal dust got sick and died of black lung disease. But coal dust can cause serious health problems above ground as well, according to studies by a public-health researcher presented in Boston Sunday at the annual conference of the American Association for the Advancement of Science.   Containment of the dust-generating process and isolating workers from dusty areas are useful steps in reducing the effects of coal dust. of water into the dust cloud. primary .


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Effects of water on coal cutting forces and primary dust distribution by Wallace W. Roepke Download PDF EPUB FB2

Effects of water on coal cutting forces and primary dust distribution. Pittsburgh, Pa. (P.O. BoxPittsburgh ): U.S.

Dept. of the Interior, Bureau of Mines, (OCoLC) Research to evaluate the lubricity effects achieved by spraying water on the cutting bit of a mining machine or spraying water on the coal during cutting has shown that neither practice affects cutting forces, as had been believed.

Effects of water on coal cutting forces and primary dust distribution. Authors. Effects of water on coal cutting forces and primary dust distribution.

Published Date: "Research to evaluate the lubricity effects achieved by spraying water on the cutting bit of a mining machine or spraying water on the coal during cutting has shown that neither practice affects cutting forces, as had been believed.

Cited by: 1. Coal mining. Mining operations can negatively impact water supplies, often with long-lasting effects. The fundamental issue involves contamination of nearby rivers, lakes, and aquifers by what comes out of a coal mine—usually highly acidic water containing heavy metals like arsenic, copper, and lead.

The process is known as acid mine happens when certain substances (typically. To explore the effects of downwind and upwind coal cutting on dust pollution in a fully mechanized mining face, the airflow-dust migration was simulated by using ANSYS-FLUENT software, and the follow-up spraying dust control method was optimized according to the differences in dust concentration distribution during downwind and upwind coal : Guobao Zhang, Gang Zhou, Shuzheng Song, Lichao Zhang, Biao Sun.

The health and environmental impact of the coal industry includes issues such as land use, waste management, water and air pollution, caused by the coal mining, processing and the use of its addition to atmospheric pollution, coal burning produces hundreds of millions of tons of solid waste products annually, including fly ash, bottom ash, and flue-gas desulfurization sludge, that.

In order to study wetting agent effects on coal dust capture, laboratory experiments were conducted with three wetting agents used by the coal industry on mesh sized Pocahontas No.

3 coal dust. Significant differences in coal dust sink times were observed among the three wetting agents at water mixture concentrations of %, % and %. Finally, Rao () found that coal dust reduced growth and reproduction in two fruit tree species, at rates varying from gm2d 1.

The only study of the effects of dust on the commu- nity structure of a natural woodland has been that of Brandt & Rhoades (), who studied limestone dust deposition in Virginia, USA. In South Africa, for example, a study found that coal dust from the Richards Bay Coal Terminal harms local mangrove trees and related ecosystems by impairing the ability of the trees to photosynthesize.

The researchers noted: [coal] dust on the undersurface of leaves is not removed by wind, rain, or even physical washing. There is no such thing as a safe health threshold for coal dust. Yet just a few kilometres downwind of the central Queensland city of Mackay, giant coal terminals, which already feature open coal stockpiles, are being proposed for massive expansion.

This puts the health of the people of Mackay and surrounding townships and beach communities – particularly those living closer to the port and. Other impacts. High levels of dust can reduce visibility and become a safety hazard.

Coal dust is an important cause of underground explosions. Preventing underground explosions and their catastrophic consequences must always be a high priority in all mining operations, particularly underground coal mining operations.

However, coal repels water and requires the use of more moisture and, in some cases, chemical additives to increase absorption. Too little moisture results in airborne dust.

Too much moisture may compromise the integrity of the material, cause costly production problems/equipment damage and create dangerous sludge. Learn why particle size is important, how to interpret particle size distribution calculations, result interpretation, setting specifications and more.

HORIBA's full line of particle characterization instruments are explained in detail as well as how to select the right particle size analyzer for your application.

ing of the respiratory health effects of coal mine dust described in the NIOSH CCD, they do not contradict or critically modify the primary conclusions and associated recommendations given there. Rather, the new findings strength-en those conclusions and recommendations.

Overall, the evidence and logical basis for recommendations concerning. No adverse effects on product quality or plant and machinery should be created. But the system used in the plant is not meeting the entire requirement, especially it does not meet Health & Safety requirements.

Existing dust suppression system: The existing dust suppression system in the coal handling plant is a wet dust suppression system. While the coal industry continues to play a vital role in modern economies, governments involved in mining, as well as relevant environmental bodies, also recognize the significance of reducing the effects of coal mining on the environment.

Considering the potential for considerable dust emissions from coal mining activities, these bodies have. The Dust Bowl was a natural disaster that devastated the Midwest in the s. It was the worst drought in North America in 1, years.

  Unsustainable farming practices worsened the drought’s effect, killing the crops that kept the soil in place. When winds blew, they raised enormous clouds of dust. 3 complications such as PMF was higher for those miners showing clinical symptoms and thus with more advanced extents of simple CWP.

Models developed on the basis of a American study5 indicate that between 2% and 12% of miners exposed to a constant dust burden of 2mg/m3 in a bituminous coal mine would be expected to have simple CWP after a 40 year working life.

From 1 Novemberthe occupational exposure limit (OEL) for respirable dust at coal mines is mg/m 3. Find out more about the exposure level review. Dust particles are generated and can become airborne during many of the extraction and processing activities associated with producing and processing rock and mineral products.

Other Health Effects. Irritation to eyes, ears, nose, throat, and skin. Emphysema. Drilling rock unleashes silica dust, which is 20 times more toxic than basic coal dust.

Enclose the primary hopper dump. Use water sprays to suppress the dust in the enclosure. Control coal dust at a company specializing in the unloading, storage and loading of dry bulk commodities, including coal, fertilizer, seed and animal feed.

The goal was to extend air filter life on loading equipment, reduce standing water and maintain good health/safety conditions, replacing marginally effective sprinklers. Where there is coal, there is coal dust, one of the biggest nuisances for coal-fired power plants. The U.S. produces more than 1 billion tons of coal each year, and.

Jacob Queen Last Modified Date: J Coal dust is harmful—the primary dangers are two disorders called coal workers pneumoconiosis (CWP) and progressive massive fibrosis (PMF). Both disorders are also commonly called black lung disease because of the way they make a person’s lungs look.

These disorders can happen when people who work in coalmines inhale too much coal dust .