- Title
- The effects of coal dust concentrations and particle sizes on the minimum auto-ignition temperature of a coal dust cloud
- Creator
- Ajrash, Mohammed Jabbar; Zanganeh, Jafar; Moghtaderi, Behdad
- Relation
- Fire and Materials Vol. 41, Issue 7, p. 908-915
- Publisher Link
- http://dx.doi.org/10.1002/fam.2437
- Publisher
- John Wiley & Sons
- Resource Type
- journal article
- Date
- 2017
- Description
- Flash fires and explosions in areas containing an enriched combustible dust atmosphere are a major safety concern in industrial processing. An experimental study was conducted to analyse the effects of atmospheric coal dust particle sizes and concentrations on the minimum auto-ignition temperature (MAIT) of a dust cloud. Two different coal samples from Australian coal mines were used. The coal dust particles were prepared and sized in 3 ranges, of below 74 μm, 74 to 125 μm and 125 to 212 μm, by using a series of sieves and a sieve shaker. A humidifier was used to increase the moisture content of the particles to the required level. All the experiments were conducted in accordance with the ASTM E1491-06 method in a calibrated Goldbert-Greenwald furnace. The results from this study indicate that coal dust properties, such as the chemical nature (H/C), concentration, particle size (D50), and moisture content, impact on the MAIT. For coal dust concentrations less than 1000 g.m−3, the MAIT decreases with increasing coal dust concentrations. On the other hand, for low concentrations of 100 to 15 g.m−3, the MAIT becomes more reliable for particle size D50 rather than for volatile matters.
- Subject
- coal dust; coal ignition; flash fire; ventilation air methane; volatile matter
- Identifier
- http://hdl.handle.net/1959.13/1351014
- Identifier
- uon:30647
- Identifier
- ISSN:0308-0501
- Language
- eng
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