Citation

Liao H, Su H, Zhu Y, Li M. China Saf. Sci. J. 2022; 32(12): 165-173.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.12.1095

PMID

unavailable

Abstract

In order to reveal the movement rule of hematite mine dust in the human respiratory tract, a three⁃dimensional model of oral and bronchial human body complete respiratory tract was established by ANSYS software. Using the ore dust sample of a open pit hematite as the research object, this study would provide theoretical basis for occupational protection of iron ore dust. The movement and deposition rule of hematite ore dust in the respiratory tract of workers with different labor intensity was simulated by discrete phase model. The results show that dust deposition is affected by the particle size of dust and the labor intensity. The deposition rate of ore dust with particle size greater than 1 滋m increases with the increase of particle size and labor intensity. The mineral dust above 5. 21 滋m deposits in respiratory tract, and the deposition rate of pharynx is more than 85%. The mineral dust mainly deposits at the back of throat and at the trachea vortex. The greater the labor intensity, the greater the deposition at the back of throat, and the lower the deposition rate in the trachea. With the increase of particle size, the deposition rate of ore dust in the trachea first increases and then decreases. The escape positions are mainly the bronchus of the lateral lower part of the left lower lobe and the bronchus of the lateral lower part of the right lower lobe. © 2022 China Safety Science Journal. All rights reserved.

Language: zh