The microscopic mechanism on MPP inhibiting explosion of Al-Mg alloy powder

被引：0
|
作者：
Li Z. [1 ]
Li C. [1 ]
Wang H. [1 ]
Wang S. [1 ]
Li Q. [2 ]
机构：
[1] College of Petrochemical Technology, Lanzhou University of Technology, Gansu, Lanzhou
[2] School of Electronic Information Engineering, Lanzhou Institute of Technology, Gansu, Lanzhou
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 08期
关键词：
Al-Mg alloy powder; explosion; explosion characteristic; explosion suppressor; powder; secure;
D O I：
10.11949/0438-1157.20230598
中图分类号：
学科分类号：
摘要：
There is a certain explosion risk in the polishing process of Al-Mg alloy. To reduce the damage of explosion accident on Al-Mg alloy powder, melamine polyphosphate (MPP) was selected to study the suppression mechanism of Al-Mg alloy powder explosion. The effect of MPP on the dust explosion characteristics of aluminum-magnesium alloy was analyzed by using 20 L explosion ball and thermal analysis experiment. Combined with the chemical composition analysis and the functional group change of the explosion products, the mechanism on MPP inhibiting the explosion of Al-Mg alloy powder was analyzed. The results show that the addition of 70% (mass) MPP in Al-Mg alloy dust can achieve complete explosion suppression. It was endothermic during MPP decomposition and inert gases (NH3, H2O, and CO2) were generated for reducing oxygen concentration. In this process, the polyphosphate transformed to phosphoric acid, which can reacts with the active group. The effect of MPP on inhibiting the oxidation of Al to form AlO groups is obviously better than that on inhibiting the oxidation reaction of Mg. The results can provide theoretical basis for industrial prevention on explosion accident of Al-Mg alloy powder. © 2023 Materials China. All rights reserved.
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页码：3608 / 3614
页数：6
相关论文
共 36 条
  • [1] Taveau J, Hochgreb S, Lemkowitz S, Et al., Explosion hazards of aluminum finishing operations, Journal of Loss Prevention in the Process Industries, 51, pp. 84-93, (2018)
  • [2] Liu X X., Cause analysis of fire accidents in university laboratories based on correspondence analysis, Safety & Health, 7, pp. 68-71, (2022)
  • [3] Hu Y, Song L, You F, Et al., An Introduction to Fire Chemistry, (2007)
  • [4] Meng X Q., Study on methane explosion suppression characteristics of gas/solid two-phase inhibitor, (2019)
  • [5] Wang Y, Lin C D, Qi Y Q, Et al., Suppression of polyethylene dust explosion by sodium bicarbonate, Powder Technology, 367, pp. 206-212, (2020)
  • [6] Chen X F, Zhang H M, Chen X, Et al., Effect of dust explosion suppression by sodium bicarbonate with different granulometric distribution, Journal of Loss Prevention in the Process Industries, 49, pp. 905-911, (2017)
  • [7] Wang Q H, Shen Z Y, Wang Q F., Comparative analysis of the effectiveness of powder materials on suppressing aluminum dust cloud explosion, Journal of Central South University (Science and Technology), 51, 4, pp. 922-930, (2020)
  • [8] Dai L, Hao L, Kang W, Et al., Inhibition of different types of inert dust on aluminum powder explosion, Chinese Journal of Chemical Engineering, 28, pp. 1941-1949, (2020)
  • [9] Li Y N., Study on explosion suppression of metal dust by ammonium dihydrogen phosphate, (2015)
  • [10] Wang Z, Meng X B, Yan K, Et al., Inhibition effects of Al(OH)<sub>3</sub> and Mg(OH)<sub>2</sub> on Al-Mg alloy dust explosion, Journal of Loss Prevention in the Process Industries, 66, (2020)
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