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Explosibility of micron- and nano-size titanium powders


Boilard, SP and Amyotte, PR and Khan, FI and Dastidar, AG and Eckhoff, RK, Explosibility of micron- and nano-size titanium powders, Journal of Loss Prevention in the Process Industries, 26, (6) pp. 1646-1654. ISSN 0950-4230 (2013) [Refereed Article]

DOI: doi:10.1016/j.jlp.2013.06.003


Explosibility of micron- and nano-titanium was determined and compared according to explosion severity and likelihood using standard dust explosion equipment. ASTM methods were followed using a Siwek 20-L explosion chamber, MIKE 3 apparatus and BAM oven. The explosibility parameters investigated for both size ranges of titanium include explosion severity (maximum explosion pressure (Pmax) and size-normalized maximum rate of pressure rise (KSt)) and explosion likelihood (minimum explosible concentration (MEC), minimum ignition energy (MIE) and minimum ignition temperature (MIT)). Titanium particle sizes were -100 mesh (<150 μm), -325 mesh (<45 μm), ≤20 μm, 150 nm, 60-80 nm, and 40-60 nm. The results show a significant increase in explosion severity as the particle size decreases from -100 mesh with an apparent plateau being reached at -325 mesh and ≤20 μm. Micron-size explosion severity could not be compared with that for nano-titanium due to pre-ignition of the nanopowder in the 20-L chamber. The likelihood of an explosion increases significantly as the particle size decreases into the nano range. Nano-titanium is very sensitive and can self-ignite under the appropriate conditions. The explosive properties of the nano-titanium can be suppressed by adding nano-titanium dioxide to the dust mixture. Safety precautions and procedures for the nano-titanium are also discussed. © 2013 Elsevier Ltd.

Item Details

Item Type:Refereed Article
Keywords:Maximum pressure; Maximum rate of pressure rise; Minimum explosible concentration; Minimum ignition energy; Minimum ignition temperature; Nano-titanium; Explosions; Ignition; Maximum likelihood; Particle size; Maximum pressure; Nanotitanium
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Environmentally sustainable mineral resource activities
Objective Field:Environmentally sustainable mineral resource activities not elsewhere classified
UTAS Author:Khan, FI (Professor Faisal Khan)
ID Code:94525
Year Published:2013
Web of Science® Times Cited:48
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-09-11
Last Modified:2017-11-03

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