Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
권호 표지
DOI QR코드

DOI QR Code

Explosion Hazards of Aluminum Powders with the Variation of Mean Diameter

알루미늄 분진의 평균입경 변화에 따른 폭발위험성

  • Han, Ou-Sup (Occupational Safety & Health Research Institute, KOSHA) ;
  • Han, In-Soo (Occupational Safety & Health Research Institute, KOSHA)
  • 한우섭 (한국산업안전보건공단 산업안전보건연구원) ;
  • 한인수 (한국산업안전보건공단 산업안전보건연구원)
  • Received : 2014.06.17
  • Accepted : 2014.08.12
  • Published : 2014.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the explosion characteristic of aluminium powders have been investigated as a function of particle size using by a 20 L dust explosion apparatus (K$\ddot{u}$hner). The tested aluminium particle sizes were the volume mean diameter of 16, 33 and $88{\mu}m$. The lower explosion limit increases gradually with the increasing of dust particle diameter, respectively 40, 60, $125g/m^3$ in mean diameter of 16, 33 and $88{\mu}m$. Also the increase in particle size for each aluminum dusts was found to cause an decrease in explosion pressure and Kst of dust explosion index, and a increase in the lower explosion concentration. Research results may have important implications for aluminum powders utilization and safety operation.

본 연구에서는 알루미늄 분말의 입자 크기에 따른 폭발특성을 20 L 분진폭발실험장치(K$\ddot{u}$hner제작)를 사용하여 조사하였다. 사용한 시료는 각각 16, 33, $88{\mu}m$의 체적기준 평균입경을 갖는 알루미늄 입자를 대상으로 실험을 수행하였다. 분진의 평균입경이 16, 33, $88{\mu}m$에서 폭발하한농도는 각각 40, 60, $125g/m^3$로서 분진의 입경이 증가하면 점차적으로 증가하는 경향을 나타냈다. 또한 각각의 알루미늄 분진에서 입자 크기의 증가는 폭발압력 및 분진폭발지수($K_{st}$)의 감소로 이어졌다. 이러한 본 연구 결과는 알루미늄 분말의 활용 및 안전 운전을 위한 중요 자료로 활용될 수 있다.

Keywords

References

  1. Database for Major industrial accidents, Korea Occupational Safety and Health Agency, (1988-2013)
  2. Kwok, Q. S. M., Fouchard, R. C., Turcotte, A., Lightfoot, P. D., Bowes, R., &Jones, D. E. G., "Characterization of aluminum nano-powder compositions", Propellants, Explosives, Pyrotechnics, 27, 229-240, (2002) https://doi.org/10.1002/1521-4087(200209)27:4<229::AID-PREP229>3.0.CO;2-B
  3. Cashdollar, K. L., "Overview of dust explosibility characteristics", Journal of LossPrevention in the Process Industries, 13, 183-199, (2000) https://doi.org/10.1016/S0950-4230(99)00039-X
  4. Dreizin, E. L., "Experimental study of stages in aluminum particle combustion in air", Combustion and Flame, 105, 541-556, (1996) https://doi.org/10.1016/0010-2180(95)00224-3
  5. Cashdollar, K. L., "Flammability of metals and other elemental dusts", Process Safety Progress, 13, 139-145 (1994) https://doi.org/10.1002/prs.680130306
  6. Ballal, D. R., "Flame propagation through dust clouds of carbon, coal, aluminium and magnesium in an environment of zero gravity", Proceedings of the Royal Society of London, A385, 21-51, (1983)
  7. Myers, T. J., "Reducing aluminum dust explosion hazards: case study of dust inerting in an aluminum buffing operation", Journal of Hazardous Materials, 159(1), 72-80, (2008) https://doi.org/10.1016/j.jhazmat.2008.02.106
  8. O. Dufaud, M. Traore, L. Perrin, S. Chazelet, D. Thomas, "Experimental investigation and modelling of aluminum dusts explosions in the 20 L sphere", Journal of Loss Prevention in the Process Industries, 23, 226-236, (2010) https://doi.org/10.1016/j.jlp.2009.07.019
  9. Baudry, G., Bernard, S., & Gillard, P., "Influence of the oxide content on the ignition energies of aluminum powders", Journal of Loss Prevention in the Process Industries, 20(4-6), 330-336, (2007) https://doi.org/10.1016/j.jlp.2007.04.025
  10. ASTM E1226, "Standard Test Method for Pressure and Rate of Pressure Rise for Combustible Dusts", The American Socirty for Testing and Materials, (1988)
  11. Eckhoff, R.K., "Dust Explosion in the Process Industries ; 3rd ed.", BH (2003)
  12. ISO 6184/1, "Explosion Protection Systems-Part 1: Determination of Explosion Indices of Combustible Dusts in Air", Switzerland: International Organization for Standardization, (1985)
  13. BIA/BVS/IES, "Brenn und Explosions ; Kenngro-ssen von Stauben", Erich Schmidt Verlag, (1987)
  14. BS EN 14034-3, "Determination of Explosion Characteristics of Dust Clouds - Part 3 : Determination of the Lower Explosion Limit LEL of Dust Clouds", (2006)
  15. O. Dufaud, M. Traore, L. Perrin, S. Chazelet, D. Thomas, "Experimental investigation and modelling of aluminum dusts explosions in the 20 L sphere", Journal of Loss Prevention in the Process Industries, 23, 226-236, (2010) https://doi.org/10.1016/j.jlp.2009.07.019