| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation and Experimental Study of Fire Extinguishing of a New Mining Fire Extinguishing Material — Gel Dry Water Powder |
| ZHANG Yingxin1,*, YANG Kang1, LI Rijun2, GAO Jiangfan1, YANG Yongfeng1
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1 School of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150000, China
2 School of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710000, China |
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Abstract The suddenness and unpredictability of mine fires are important factors affecting the safe mining of coal resources. At present, although research on coal mine fire extinguishing materials has made some achievements, there are still many problems unresolved. This work prepared a new type of mining dry water powder fire extinguishing material with hydrophobic gas-phase silica as a solid coating layer and liquid phase aqueous solution as the core material under the high shear force generated by a high-speed dispersion machine. There were 16 samples prepared to measure their various properties. Excellent dry water powder materials were selected for fire extinguishing experiments, and a fine water mist fire extinguishing experiment was set as the control group. The results showed that the dry water powder material prepared at a solid-liquid ratio of 1∶12, a rotational speed of 3 000 r/min, a dispersion time of 3 min, and with a cold bonded resin addition of 0.3 g has excellent fire extinguishing performance. By comparing the experimental phenomena and experimental data of two materials, it can be concluded that gel dry water powder can extinguish the open fire in a very short time (1.5 s), and reduce the central temperature of the heat source field to below 200 ℃ within 2 minutes. It is superior to fine water mist in terms of fire extinguishing rate and cooling performance. The fire extinguishing application of gel dry water powder will provide new ideas, new technologies and new breakthroughs for the research of fire extinguishing materials in coal mine fire areas.
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Published: 25 December 2024
Online: 2024-12-20
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| Fund:Natural Science Foundation of Heilongjiang Province (LH2020E122),Basic Scientific Research Operating Expenses of Provincial Colleges and Universities in Heilongjiang (2022-KYYWF-0525). |
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2024, Vol. 38 
