COAL DUST EXPLOSION HAZARDS by CLETE R. STEPHAN, P.E ...

COAL DUST EXPLOSION HAZARDS by CLETE R. STEPHAN, P.E. MINE SAFETY AND HEALTH ADMININSTRATION PITTSBURGH, PENNSYLVANIA ABSTRACT There are a large number of facilities throughout the world which handle coal, such as preparation plants. Many other facilities use coal as a fuel, such as cement and lime factories. Although

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Coal dust - Wikipedia

Coal dust is a fine powdered form of coal, which is created by the crushing, grinding, or pulverizing of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal.It is a form of fugitive dust.. Grinding coal to dust before combusting it improves the speed and efficiency of burning and makes the coal easier to handle.

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Technology News 515 - Float Coal Dust Explosion Hazards

Float coal dust is a serious explosion hazard if it accumulates on top of the rock dust and is not mixed thoroughly with the rock dust. Technology News - April 2006. Download PDF Document. NIOSHTIC2 Number: 20029929.

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Coal Dust Explosion Prevention and Protection Based on ...

coal dust explosion occurred at Dongfeng mine in Qintanhe and caused 171 deaths. Therefore, it is very significant to prevent and mitigate dust explosion intrinsically with the thinking of inherent safety. Overton said that this thinking was helpful to prevent and control dust explosion in …

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pulverised coal mill explosions

Pulverised coal is a significant dust explosion hazard, as large quantities are suspended in air for transfer from the mill to the power plant. Explosions ... Coal dust - Wikipedia, the free encyclopedia ... COAL DUST EXPLOSION HAZARDS by CLETE R. STEPHAN, P.E ...

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CDC - NIOSH Pocket Guide to Chemical Hazards - Coal dust

See Appendix C (Mineral Dusts) [Note: The Mine Safety and Health Administration (MSHA) PEL for respirable coal mine dust with 5% silica is 2.0 mg/m³, or (10 mg/m³) / (% respirable quartz + 2) for coal dust with > 5% silica.] See Appendix G

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Material Safety Data Sheet U.S. Department of Labor

Unusual Fire and Explosion Hazards Fine dust dispersed in air in sufficient concentrations, and in the presence of an ignition source is a potential dust explosion hazard. Minimum explosible concentration 0.140 g/l A document titled “Coal dust explosion hasards” by CLETE R. STEPHAN P.E can be accessed online at

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Coping with Coal Dust - POWER Magazine

29-2-2012· Plants can no longer sweep coal dust under the rug and ignore the health and safety hazard it presents, because a single spark can cause a dust explosion that …

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Dust explosion - Wikipedia

A dust explosion is the rapid combustion of fine particles suspended in the air within an enclosed location. Dust explosions can occur where any dispersed powdered combustible material is present in high-enough concentrations in the atmosphere or other oxidizing gaseous medium, such as pure oxygen.In cases when fuel plays the role of a combustible material, the explosion is known as a fuel …

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Dust explosion info | Website for dust explosion information

Dust Explosion Info Dust Explosion Info is an information centre for Engineers, Safety Professionals and anyone involved with the potential hazard of dust explosions. The website is an excellent starting point for those wanting to know more about explosions; the physical characteristics of a dust explosion, the necessary conditions for an explosion to occur, potential ignition sources, dust ...

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Dust Explosion - an overview | ScienceDirect Topics

Dust explosions can result in very significant property damage and serious injuries to personnel. Combustible dusts are defined as: “A combustible particulate solid that presents a fire or explosion hazard when suspended in air or the process-specific oxidizing medium over a range of concentrations, regardless of particle size or shape.” [13]

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coal dust explosion hazard by clete - Gold Ore Crusher

coal dust explosion hazards by clete r. stephan, p.e … 1 coal dust explosion hazards by clete r. stephan, p.e. mine safety and health admininstration pittsburgh, pennsylvania abstract …

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DIESEL TECHNOLOGY WORKSHOP

• DPM in Underground Coal • Already Have Requirements – 2.5 Grams/Hour (Heavy Equipment), 5 Grams/Hour (Light Duty) • Limited data or studies of DPM in the underground coal environment • Underground Coal and Ventilation Requirements • 8000 CFM – Dodge Truck • 8500 CFM – Getman Hauler • 9000 CFM – Wagner Scoop • 4500 CFM ...

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Dust sampling and laboratory testing procedures after ...

Dust sampling and laboratory testing procedures after underground coal mine explosions / By Clete R. Stephan, Paul S. Parobeck and United States. Mine Safety and Health Administration.

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Kawenski, Edward M. [WorldCat Identities]

Control of the dust explosion hazard on coal mine shuttle-car runways by John Nagy ... Float coal hazard in mines : a progress report by John Nagy ( Book ) 3 editions published ... Stephan, Clete R. ...

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UNITED STATES DEPARTMENT OF LABOR

David A. Steffey Clete R. Stephan Mining Engineer General Engineer District 6, Pikeville, KY PSHTC, ... Failure to Record Hazards ... Coal Dust Explosion .....65 The Explosion Originated in the Tailgate Entry of the Longwall ...

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MSHA -Program Policy Letter - P13-V-11 - Program for ...

Explosions fueled by float coal dust are one of the greatest potential hazards to underground coal miners. The generation of float coal dust occurs whenever coal is cut or crushed. Float coal dust is generated in underground coal mines by continuous mining machines, longwall shearers, belt conveyors, feeder breakers, stage loaders, and the tires or wheels of mine equipment rolling over loose coal.

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Evaluation of Polymer Construction Material and Water Trap ...

138 kPa to occur very far from the explosion origin provided that the area on either side of the seal contained sufficient incombustible and minimal coal dust accumulations. This is the first full-scale test program to evaluate seal designs in entry geometries similar to those of current U.S. underground coal …

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Historical Summary of Coal Mine Explosions in the United ...

coal mine explosions up to 1958, Although it was impossible to repro- duce the drama and depth of the 1959 report, the present authors attempt to follow the same format, so that the reader will have a continuous record for another 23 years, Even though the frequency and severity of major coal mine explosions

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Safety and Health Information Bulletins | Fire and ...

5-12-1995· Information from Dust Explosions(2) indicates that any material that will burn in air, when in a solid form, may explode when it is a finely divided powder. According to the paper, dried biosolids must be processed and handled carefully to avoid both fire and explosion hazards. This is true whether the dried biosolids are powdery or pelletized.

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Historical Summary of Coal Mine Explosions in the United ...

coal mine explosions up to 1958, Although it was impossible to repro- duce the drama and depth of the 1959 report, the present authors attempt to follow the same format, so that the reader will have a continuous record for another 23 years, Even though the frequency and severity of major coal mine explosions

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coal dust explosion hazard by clete - Gold Ore Crusher

coal dust explosion hazards by clete r. stephan, p.e … 1 coal dust explosion hazards by clete r. stephan, p.e. mine safety and health admininstration pittsburgh, pennsylvania abstract …

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Evaluation of Polymer Construction Material and Water Trap ...

138 kPa to occur very far from the explosion origin provided that the area on either side of the seal contained sufficient incombustible and minimal coal dust accumulations. This is the first full-scale test program to evaluate seal designs in entry geometries similar to those of current U.S. underground coal …

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Welcome to CDC stacks

In underground mines, coal dust explosions are prevented by the addition of rock dust sufficient to render the coal dust inert. The National Institute for Occupational Safety and Health (NIOSH) has developed a hand-held instrument that uses optical r...

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Welcome to CDC stacks

Dispersible rock dust must be applied to the surfaces of entries in underground coal mines in order to inert the coal dust entrained or made airborne during an explosion and prevent propagating explosions. 30 CFR. 75.2 states that "…

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U.S. STEEL MINING COMPANY, INC. -- April 30, 2003

During this process coal dust and methane are produced. To reduce the explosive hazard the oxygen content in the GCI system is reduced by injecting nitrogen into the system at various locations. According to U.S. Steel safety procedures for the GCI system, the oxygen concentrations must be maintained well below 12% - - the level necessary for a fire or explosion (Operator's Exhibit I).

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Sago Mine disaster - Wikipedia

The Sago Mine disaster was a coal mine explosion on January 2, 2006, at the Sago Mine in Sago, West Virginia, United States, near the Upshur County seat of Buckhannon.The blast and collapse trapped 13 miners for nearly two days; only one survived. It was the worst mining disaster in the United States since the Jim Walter Resources Mine disaster in Alabama on September 23, 2001, and the worst ...

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Combustible Dust Hazard Prevention - Grainger KnowHow

Combustible dust, as defined by OSHA, is “a solid material composed of distinct particles or pieces, regardless of size, shape or chemical composition, which can present a fire or deflagration hazard when suspended in air or some other oxidizing medium over a range of concentrations.”

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TECHNICAL UPDATE - Ning

process safety specialists to characterize the risk of a dust explosion. The second part of this article will review the hazards analysis method / approach that may be used in conjunction with the test data to develop a dust explosion mitigation strategy. REFERENCES 1. Stephan C.R. Coal Dusts as a Fuel for Fires and Explosions.

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Process Safety Management & Hazard Analysis - PHA ...

3-2-2009· Magnesium Dust Explosion. Stonehouse Process Safety commentary: There are a number of reasons why metal dust explosions are particularly hazardous.First, dust cloud explosion temperatures and pressures for most organic materials are limited to about 2,300 o C and 9 barg respectively. In contrast, explosion temperatures and pressures for most metals can reach around …

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