Details:

Personal Author:
Cashdollar, Kenneth L. ; Zlochower, Isaac A.
Cashdollar, Kenneth L. ; Zlochower, Isaac A. Less -
Corporate Authors:
Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)
Conference Authors:
International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (6th : 2006 : Halifax, NS, Canada)
Description:
Publishehed in: Proceedings of the Sixth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions, Halifax, NS, Canada, August 27 - September 1, 2006. Halifax, Canada: Dalhousie University, 2006 Aug; 1:98-113.

The Pittsburgh Research Laboratory of the National Institute for Occupational Safety and Health conducted a study of the explosibility of various metals and other elemental dusts dispersed in air, with a focus on the experimental explosion temperatures. The data are useful for understanding the basics of dust cloud combustion, as well as for evaluating the explosion hazards in the minerals and metals processing industries. The dusts studied included boron, carbon, magnesium, aluminum, silicon, sulfur, titanium, chromium, iron, nickel, copper, zinc, niobium, molybdenum, tin, hafhium, tantalum, tungsten, and lead. The dusts were chosen to cover a wide range of physical properties - from the more volatile materials such as magnesium, aluminum, sulfur, and zinc to the highly "refractory" (very low volatility) elements such as carbon, niobium, molybdenum, tantalum, and tungsten. These flammability studies were conducted in a 20-L chamber, using strong pyrotechc ignitors. The experimental data obtained included the minimum explosible concentrations, maximum explosion pressures, and maximum explosion temperatures. A unique multiwavelength infrared pyrometer was used to measure the temperatures. For the elemental dusts studied, all ignited and burned as air-dispersed dust clouds except for nickel, copper, molybdenum, and lead. The measured maximum explosion temperatures ranged from -1 550 K for tin and tungsten powders to -2800 K for aluminum, magnesium, and titanium powders. The measured temperatures are compared to the calculated, adiabatic flame temperatures. In general, the dusts whose experimental temperatures were closer to the adiabatic values were those with the finer particle sizes, those that were more easily vaporized, and/or those that were intrinsically more reactive.

NIOSHTIC No 20031124


Subjects:
[+]
Dust Explosions Explosions Mine Explosions Mineral Dusts
Document Type:
Report
Genre:
Conference Publications
Collection(s):
Stephen B. Thacker CDC Library collection
Main Document Checksum:
[+]
urn:sha256:991fb94de9bade3e8c71065661b70a0c8b8e32f705383b177a3f4341634bbb69
Download URL:
https://stacks.cdc.gov/view/cdc/8762/cdc_8762_DS1.pdf
File Type:

Supporting Files

• No Additional Files

More +