DOI QR코드

DOI QR Code

Ignition Temperature and Residence Time of Suspended Magnesium Particles

마그네슘 부유 분진의 입자 체류시간과 발화온도

Han, Ou-Sup
한우섭

  • Received : 2015.05.07
  • Accepted : 2015.06.08
  • Published : 2015.06.28

Abstract

Effects of residence time on the MIT(Minimum Ignition Temperature) in suspended Mg particles are examined by using MIT experimental data and calculation results of terminal velocity. With increasing of the average particle diameter, we were able to identify that MIT of Mg dusts increased and the calculated residence time of particle decreased exponentially. Also, the influence on terminal velocity due to temperature increase increased slightly with increasing of average particle diameter.

Keywords

magnesium particles;terminal velocity;minimum ignition temperature;residence time

References

  1. Eckhoff, R. K., Dust Explosions in the process industries (3rd ed.), Amsterdam: Gulf Professional Publishing (2003)
  2. Palmer, K. N., Dust explosions and fires. London: Chapman and Hall, 42-111 (1973)
  3. IEC 61241-2-1-1994, Methods for Determining the Minimum Ignition Temperatures of Dust. Part 2: Dust Cloud in a Furnace at a Constant Temperature, Central Office of International Electrotechnical Commission, Geneva, Switzerland, 11-27 (1994)
  4. M. Mittal, B.K. Guha, Study of ignition temperature of a polyethylene dust cloud, Fire Mater., 20, 97-105 (1996) https://doi.org/10.1002/(SICI)1099-1018(199603)20:2<97::AID-FAM568>3.0.CO;2-L
  5. U. Krause, M. Wappler, S. Radzewitz, F. Ferrero, On the minimum ignition temperature of dust clouds, in: Proceedings of Sixth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosion, vol. I, Dalhousie University, Halifax, NS, Canada, August 27.September 1, 68-76 (2006)
  6. M. Mittal, B.K. Guha, Study of ignition temperature of a polyethylene dust cloud, Fire Mater., 20, 97-105 (1996) https://doi.org/10.1002/(SICI)1099-1018(199603)20:2<97::AID-FAM568>3.0.CO;2-L
  7. M. Mittal, B.K. Guha, Models for minimum ignition temperature of organic dust clouds, Chem. Eng. Technol., 20, 53-62 (1997) https://doi.org/10.1002/ceat.270200111
  8. G. Li, C.M. Yuan, P.H. Zhang, B.Z. Chen, Experiment- based fire and explosion risk analysis for powdered magnesium production methods, J. Loss Prev. Process Ind. 21, 461-465, (2008)
  9. M. Nifuku, S. Koyanaka, H. Ohya, C. Barre, M. Hatori, S. Fujiwara, S. Horiguchi, I. Sochet, Ignitability characteristics of aluminium and magnesium dusts that are generated during the shredding of post-consumer wastes, J. Loss Prev. Process Ind., 20, 322-329 (2007) https://doi.org/10.1016/j.jlp.2007.04.034
  10. Han, O.S., Lee, J.S., Characteristic of Thermal Decomposition and Ignition Temperature of Magnesium Particles, KIGAS, 17(5), 69-74 (2013)
  11. Almedeij J. Drag coefficient of flow around a sphere : matching asymptotically the wide trend, Powder Technol, 186(3), 218-223 (2008) https://doi.org/10.1016/j.powtec.2007.12.006
  12. Concha F., Settling velocities of particulate system, J. Powder Particle, 27, 18-37 (2009) https://doi.org/10.14356/kona.2009006
  13. Gultieri C, Mihailovic DT. Fluid mechanics of environmental interfaces, Florida: Taylor & Francis; (2012)
  14. National Astronomical Observatory, Rika Nenpyo (Chronological Scientific Tables), 87th ed., Maru-zen, Tokyo (2014)