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coal explosion factor

Influencing factors of the explosion characteristics of

Jul 15, 2019 The explosiveness of injection fuel is the main factor affecting the safety of the coal pulverizing system and the normal production of blast furnace (BF) during the full implementation process of the BF pulverized coal injection technology.

Analysis of explosion risk factor potential on coal

Other factors also con- tribute to explosion in CRT, including heat from coal spontaneous combustion, presence of CO gas (which is a combustible gas from incomplete combustion), and insuf- ficient ventilation system.

Analysis of explosion risk factor potential on coal

Sep 14, 2018 According to the Denton,the conditions that trigger the occurrence of explosion in CRT are as follows: coal dust that is passed through the coal feeder; methane gas is released from coal; sparks from an electrical motor such as in jet fan, conveyor belt motor, lamp and so forth; heat from a moving conveyor; conditions of the confined space (confinement), and so on. Other factors also

Pulverized Coal Explosions in the U.S. Utility Industry

Coal Type The type of coal is a major factor influencing explosion frequencies. Units using subbituminous coals show twice the explosion frequency of units with bituminous coals. Firing a subbituminous coal does not indicate a hazardous situation by itself.

Influencing factors of the explosion characteristics of

The results showed that although the volatile matter content of modified coal was similar to the anthracite coal, the explosiveness of the modified coal was stronger than the high-volatile raw coal and the bituminous coal at various oxygen concentrations. The specific surface area of modified coal was 271.5 m 2 /g and pores were well developed. This provided good kinetic conditions for oxygen

Upper Big Branch Mine disaster Wikipedia

Explosion. The explosion occurred at 3:27 pm local time (19:27 UTC) on Monday, April 5, 2010, at the Upper Big Branch South Mine near the community of Montcoal, about 30 miles (48 km) south of Charleston.The mine was operated by the Performance Coal Company, a subsidiary of Massey Energy. The explosion ignited from an unknown source with high methane levels being a contributing causal factor.

Which factor explains why coal dust is explosive? Quora

Coal it burns slowly- it occurs in massive amounts in coal mines but access to oxygen is harder; Coal dust it burns fast if exposed to heat of flame or pressure, like an explosion. Cutting coal or blasting development headings results in dust, whether coal or dirt entering the air stream.

(PDF) Coal Mine Explosions and the Development of

One critical factor in determining the severity of an explosion is the rate of devolatilisation of the particulate coal, with higher rates being characterised b y more rap id flame pr opagation. A...

Dust explosion Wikipedia

The series of coal dust explosions within a mine rocked the close-knit township and was audible as far as 30 kilometres (19 mi) away. Benxihu Colliery explosion: April 26, 1942: Benxi, Liaoning Manchukuo (now China) coal dust and gas: 1,549: 34% of the miners working that day were killed. This is the world's worst-ever coal-mining accident.

Pulverized Coal Explosions in the U.S. Utility Industry

Coal Volatility: Explosion frequency increases with an increase in volatility content, but this trend is as weak statistically as the others. These statements and the appearance of Figure 2 remain unchanged even if a dry, ash free basis is used for volatility. Coal Moisture: Explosion frequency remains unchanged with increasing coal moisture.

Coal Dust Explosions in the Cement Industry

Factors that influence the dust fire/explosion probability include the following: 1. Fuel-Bituminous coal is the fuel typically used in a pulverized fuel system. All U.S. bituminous coals and coal dust passing through a 200-mesh sieve having a diameter of (74 pm or less) present a dust explosion hazard.

Coal Pulverizer Explosions ASTM International

The historical trends show that although coal type has a large influence on explosion frequency, it is not the only significant factor in setting explosion hazard levels. Laboratory experiments were performed in full-scale test rigs that allowed triggering and monitoring of coal system explosions on demand. Ignition events that remained within

(PDF) Coal Mine Explosions and the Development of

One critical factor in . The final line of defence, though, is the use of barriers to prevent a coal dust explosion from propagating. However, the design of passive explosion barrier systems

Underground Coal Mine Disasters 1900 2010: Events

The authors suggest that a key factor in meeting the goal of increasing successful mine escape and rescue while 1981 Adkins Coal No. 11 Explosion 8 1981 Grundy Mining No. 21 Explosion 13 1982 RFH Coal No. 1 Explosion 7 1983 Clinchfield No. 1 Explosion 8 1984 Wilberg Fire

The Second Explosion The Lusitania Resource

The torpedo could have kicked the coal dust into the air, and much like the aluminum powder theory, would have reached explosive concentrations as it settled, triggering the second explosion. Against this theory is the supposition that coal dust in the bunkers would be damp with condensation, as the steel hull was in constant contact with the

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

Originating Office Bureau of Mies

Coal Mine Health and Safety Act of 1969 (83 Stat. 742). A coal dust explosion occurred in the interconnected Nos. 15 and 16 mines of the Finley Coal Company, Hyden, Leslie County, Kentucky about 12:20 p.m., Wednesday, December 30, 1970. Thirty-eight of the 39 men who were underground at the time were killed. Observations

Dust explosion indices test Testing for Kst value, Pmax

Explosion indices test (K st value and P max) Dust explosion classes ST1, ST2 & ST3 Kst value and Pmax are explosive properties measured in the laboratory to quantify the severity of a dust explosion. The explosion indices test follows EN 14034-1:2004 (determination of the maximum explosion pressure Pmax of dust clouds) and EN 14034-2:2006 (determination of the maximum rate of explosion

Coal cargoes from Indonesia Skuld

Nov 01, 2010 According to the IMSBC Code, high methane readings are in excess of 20% of the lower explosion limit. If a cargo of coal self-heats, the process will start as hot spots in the bulk cargo. Due to the insulating nature of coal, these hot spots may be at a much higher temperature than other coal

Coal Mine Methane: A Review of Capture and Utilization

ground coal mine explosions in which methane was a contributing factor. Table 1 shows some of the major mine explosions (United Nations, 2010) after 2000. Table 1 Some of the major coal mine explosions that occurred after 2000 (modified from United Nations, 2010). Country

Monongah mining disaster Wikipedia

The Monongah mining disaster of Monongah, West Virginia occurred on December 6, 1907, and has been described as "the worst mining disaster in American history". The explosion occurred in Fairmont Coal Company’s No. 6 and No. 8 mines, and was one of the contributing events leading to the creation of the United States Bureau of Mines.

Stoichiometric Combustion Engineering ToolBox

Stoichiometric or Theoretical Combustion is the ideal combustion process where fuel is burned completely. A complete combustion is a process burning all the carbon (C) to (CO 2), all the hydrogen (H) to (H 2 O) and all the sulphur (S) to (SO 2).. With unburned components in the exhaust gas such as C, H 2, CO, the combustion process is uncompleted and not stoichiometric .

Risk Assessment of Gas Explosion in Coal Mines Based on

Gas explosion is one of the most deadly hazards in underground coal mining. Risk assessment has played an effective role in avoiding gas explosions and revising coal mine regulations.

Research on Characteristic Parameters of Coal-dust Explosion

The coal-dust explosion factor is an important basis for explosion risk assessment and explosion protection, mainly including the minimum ignition temperature of cloud (MITC), the lower explosive limit (LEL), the maximum explosion pressure (P max) and the maximum explosion index (K st) [13-15]. MITC is mainly used for the assessment of the

Coal Pulverizer Explosions ASTM International

The historical trends show that although coal type has a large influence on explosion frequency, it is not the only significant factor in setting explosion hazard levels. Laboratory experiments were performed in full-scale test rigs that allowed triggering and monitoring of coal system explosions on demand. Ignition events that remained within

Explosion Characteristics of H2/CH4/Air and CH4/Coal Dust

1-Sentence-Summary: Explosion violence of coal dust and hybrid coal dust/methane gas explosions is increased by high coal volatility content, higher hydrogen gas yield from the coal, increased initial pressure, and increased coal pore shape factor. Authors: Q. Li, B. Lin, H. Dai, and S. Zhao Read in: Three Minutes Favourite quote from the paper:

Coal Pulverizer Explosions Babcock Power

Coal Moisture: Explosion frequency remains unchanged with an increase in moisture of the as received coal. Overall, there is a connection between moisture and pulverizer age. The newer units have a trend toward using higher moisture coals. (Figure 2e) Coal Ash: Explosion frequency is higher for medium ash coals than for low and high ash coals.

Underground Coal Mine Disasters 1900 2010: Events

The authors suggest that a key factor in meeting the goal of increasing successful mine escape and rescue while 1981 Adkins Coal No. 11 Explosion 8 1981 Grundy Mining No. 21 Explosion 13 1982 RFH Coal No. 1 Explosion 7 1983 Clinchfield No. 1 Explosion 8 1984 Wilberg Fire

Coal dust explosions and their prevention

bustible material_ in coal mine dust provides a comfortable factor of safety against coal dust explosions. Other ma1or preventive measures which can be adopted include rock dust barriers, concrete stoppihgs, and pressure relief vents in their and the mineral · impurities. of the coal seam. Significant explosion studies had been conducted

Monongah mining disaster Wikipedia

The Monongah mining disaster of Monongah, West Virginia occurred on December 6, 1907, and has been described as "the worst mining disaster in American history". The explosion occurred in Fairmont Coal Company’s No. 6 and No. 8 mines, and was one of the contributing events leading to the creation of the United States Bureau of Mines.

Risk Assessment of Gas Explosion in Coal Mines Based on

Gas explosion is one of the most deadly hazards in underground coal mining. Risk assessment has played an effective role in avoiding gas explosions and revising coal mine regulations.

MSHA PIB P10-18 Accumulation of Combustible Materials

Also, mine operators must apply rock dust in areas of underground bituminous coal mines to inert coal and float coal dust, loose coal, and other combustible materials. As little as 0.005 inches (the thickness of a sheet of paper) of coal and float coal dust on top of rock dust is capable of propagating an explosion.

International Journal of Coal Science & Technology Home

Apr 10, 2021 The International Journal of Coal Science & Technology is a peer-reviewed open access journal published under the brand SpringerOpen. It focuses on key topics of coal scientific research and mining development, serving as a forum for scientists to present research findings and discuss challenging issues.

A Coal Fire May Have Helped Sink the 'Titanic' Smart

Jan 05, 2017 While a coal fire is certainly more plausible than a murderous, undead pharaoh, others still contend that the iceberg was the decisive factor in the ship’s sinking. “A fire may have

Chapter 5 The Miike coal-mine explosion

Thus, the possibility of a gas explosion is relatively low and, even if such an explosion came about, the possibility of its initiating a coal-dust explosion is likewise low. Therefore, in the case of the Miike mine, it is clear that some factor caused the dispersal of the coal dust throughout the mine and some ignition source produced the

Pulverized Coal Injection in a Blast Furnace IspatGuru

May 10, 2013 The smaller the HGI, the harder is coal texture and less grindable is the coal. Grindability is an important factor for the pulverizing of coal in the pulverizer. It influences product fineness, power consumption and the throughput. combustion of pulverized coal, and (vi) explosion

ACARP Abstract

The results were then analysed to determine overall fallout characteristics of coal and stone dust and then to help develop a spreadsheet model of dust fallout in a longwall tailgate using various stone dusting options and coal dust fallout rates. An Explosion Risk Factor was