Analysis of magnesium-aluminum alloy powder burning explosion parameters in the polishing process

被引：0
作者：
Wang Q. [1 ]
Min R. [1 ]
Sun Y. [1 ]
Dai A. [2 ]
机构：
[1] School of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an
[2] College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 05期
关键词：
Dust explosion; Explosion pressure; Limited oxygen volume fraction; Magnesium-aluminum alloy; Minimum ignition temperature;
D O I：
10.11817/j.issn.1672-7207.2020.05.005
中图分类号：
学科分类号：
摘要：
The explosion characteristic parameters of micron magnesium-aluminum alloy powder were studied by using 20 L spherical explosion experimental system and testing device of minimum ignition temperature of dust cloud. The results show that the minimum ignition temperature of magnesium-aluminum alloy dust cloud firstly decreases and then increases with the increase of dispersion pressure. The minimum ignition temperature corresponding to dispersion pressure working point decreases with the decrease of particle size. There is a critical mass concentration when the dust mass concentration of magnesium-aluminum alloy is lower than the critical mass concentration, and the minimum ignition temperature is greatly affected by the dust mass concentration. When the dust mass concentration is higher than the critical mass concentration, the minimum ignition temperature is less affected by the dust mass concentration, and the critical mass concentration of magnesium-aluminum alloy powder is 4 540 g/m3. At the same particle size, the explosion pressure firstly increases and then decreases with the increase of the mass concentration. There is a maximum explosion mass concentration, which makes the explosion pressure reach the maximum value. The explosion pressure of magnesium-aluminum alloy powder with the particle size of 502.2, 293.6 and 59.8 μm reaches the maximum at alloy powders mass concentration of 1 750 g/m3. Besides, the limited oxygen volume fractions of magnesium-aluminum alloy powder are 15%, 13% and 4% with particle sizes of 502.2, 293.6 and 59.8 μm at alloy powder mass concentration of 500 g/m3. © 2020, Central South University Press. All right reserved.
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页码：1211 / 1220
页数：9
相关论文
共 30 条
  • [1] ZHONG Shengjun, MIAO Nan, LIU Hongyang, Analysis and protection of dust explosion accident in aluminum-magnesium metal polishing process, Modern Occupational Safety, 10, pp. 26-29, (2014)
  • [2] KWON Y S, GROMOV A A, ILYIN A P, Et al., The mechanism of combustion of superfine aluminum powders, Combustion and Flame, 133, 4, pp. 385-391, (2003)
  • [3] KHAIKIN B I, BLOSHENKO V N, MERZHANOV A G., On the ignition of metal particles, Combustion Explosion and Shock Waves, 6, 4, pp. 412-422, (1973)
  • [4] DREIZIN E L., Phase changes in metal combustion, Progress in Energy and Combustion Science, 26, 1, pp. 57-78, (2000)
  • [5] AMYOTTE P R, CHIPPETT S, PEGG M J., Effects of turbulence on dust explosions, Progress in Energy and Combustion Science, 14, 4, pp. 293-310, (1988)
  • [6] VIGNES A, MUNOZ F, BOUILLARD J, Et al., Risk assessment of the ignitability and explosivity of aluminum nanopowders, Process Safety and Environmental Protection, 90, 4, pp. 304-310, (2012)
  • [7] WU Hongchun, OU H J, PENG D J, Et al., Dust explosion characteristics of agglomerated 35 nm and 100 nm aluminum particles, International Journal of Chemical Engineering, 2010, pp. 1-6, (2010)
  • [8] DING Dayu, FAN Baochun, TANG Mingjun, Et al., Numerieal simulation of aluminum dust explosionin a closed sphere, Journal of Nanjing University of Science and Technology, 1, pp. 70-74, (1993)
  • [9] LI Yanhong, Basic features of the dust esplosion, Science and Technology Information Development and Economy, 14, pp. 130-131, (2005)
  • [10] ZHAO Jiangping, WANG Zhencheng, Application of heat explosion theory to dust explosion mechanism research, China Safety Science Journal, 14, 5, pp. 80-83, (2004)
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