主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2025, Vol. 44 ›› Issue (8): 1110-1116.

• • 上一篇    下一篇

镁屑堆垛燃烧特性及高效干粉灭火剂研究

季经纬1,3, 李文举1,3, 郑越川1,3, 张宏2, 石邦凯2   

  1. （1.中国矿业大学 江苏省城市火灾防控高校重点实验室，江苏 徐州 221116； 2.中国船舶集团有限公司第七一三研究所，河南 郑州 450000； 3.中国矿业大学 安全工程学院，江苏 徐州 221116）
  • 收稿日期:2024-07-31 修回日期:2024-10-14 出版日期:2025-08-15 发布日期:2025-08-15
  • 作者简介:季经纬，中国矿业大学安全工程学院教授，博士，主要从事火灾科学与消防工程研究，江苏省徐州市大学路1号，221116，jjwcn@cumt.edu.cn。

Study on the burning characteristics of magnesium chip stack and efficient dry powder extinguishing agents

Ji Jingwei1,3, Li Wenju1,3, Zheng Yuechuan1,3, Zhang Hong2, Shi Bangkai2   

  1. (1. Jiangsu Key Laboratory of Urban Fire Prevention and Control, China University of Mining and Technology, Xuzhou Jiangsu 221116, China;2. No. 713 Research Institute, CSSC, Zhengzhou Henan 450000, China; 3. School of Safety Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China)
  • Received:2024-07-31 Revised:2024-10-14 Online:2025-08-15 Published:2025-08-15

摘要： 本文开展2种形态（水平、锥形）镁屑堆垛的燃烧特性试验，发现镁屑堆垛燃烧火焰高度低、温度较高，并且持续的内部氧化燃烧会导致温度出现“双峰”特性。为解决传统金属灭火剂难以附着在镁屑堆垛表面导致隔绝空气效果不佳的难题，配置了以低熔点玻璃粉与氯化钠干粉为主要原料的新型干粉灭火剂（NaCl/LMG），并开展锥形镁屑堆垛的灭火试验。试验结果表明，传统NaCl及新型NaCl/LMG均能扑灭锥形堆垛的表面燃烧，但NaCl未能有效抑制内部氧化，而NaCl/LMG能够形成硬质覆盖层，有效隔绝空气，抑制内部镁屑的氧化。NaCl/LMG灭火过程中堆垛表面温度的下降速度是NaCl的4.64倍，在1 200 s内可使堆垛内部温度降至200 ℃，实现有效灭火。NaCl/LMG的灭火时间和灭火剂消耗量较NaCl分别减少50%和53%。

关键词: 镁屑堆垛, 金属火灾, 干粉灭火剂, 低熔点玻璃粉

Abstract: In this paper, the combustion characteristics of magnesium chip stack in two forms (horizontal and conical) were tested, revealing that the combustion flame height of magnesium chip stack is low, the temperature is high, and the continuous internal oxidizing combustion leads to the "double peak" characteristics of temperature. To address the issue that traditional metal fire extinguishing agents struggle to adhere to the surface of magnesium chip stack, resulting in poor air insulation effect, a new dry powder fire extinguishing agent (NaCl/LMG) with low melting point glass powder and sodium chloride dry powder as the main raw materials was formulated. Fire extinguishing tests of conical stack of magnesium chips were carried out. The test results show that both the traditional NaCl dry powder and the new NaCl/LMG can extinguish the surface combustion of the conical stack. However, the NaCl dry powder fails to effectively inhibit the internal oxidation, while the NaCl/LMG can form a hard cover layer that effectively isolates air and inhibits the oxidation of the internal magnesium chips. During the fire extinguishing process by NaCl/LMG, the surface temperature of the stack decreased at a rate approximately 4.64 times that of the NaCl dry powder. Additionally, NaCl/LMG dry powder reduced the internal temperature of the stack to 200 ℃ in 1 200 s, achieving effective fire extinguishing. The fire extinguishing time and the extinguishing agent consumption of NaCl/LMG dry powder were reduced by 50% and 53% compared with NaCl dry powder, respectively.

Key words: magnesium chip stack, metal fire, dry powder extinguishing agent, low melting point glass powder