Citation

Li H, Guo X, Li S, Zhang H, Hua M, Pan X. China Saf. Sci. J. 2020; 30(1): 107-113.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.01.017

PMID

unavailable

Abstract

In order to develop efficient dry powder extinguishing agents, a novel compound powder extinguisher was prepared with ultra-fine ABC dry powder as base material and aluminum hydroxide as additive. Then, through experiments, its suppression efficiency and inhibition effects on toxic gases were measured at different mass fraction of aluminum hydroxide. The results show that as mass fraction of aluminum hydroxide rises from 0 to 10%, drop rates of temperature and flame height both increase first and then decrease while minimum extinguishing concentration (MEC) and extinguishing time decrease first and then increase. Fire-extinguishing effect and toxic gas suppression performance would be the best when mass fraction reaches 4%. Furthermore, thermogravimetric (TG) analysis results demonstrate that aluminum hydroxide can enhance thermal decomposition rate of compound ultra-fine dry powder, resulting in better fire-fighting efficiency. © 2019 China Safety Science Journal

Language: zh