Analysis on occupational exposure levels and control effectiveness of dust in cement production line of new dry method / 中华劳动卫生职业病杂志
Chinese Journal of Industrial Hygiene and Occupational Diseases
;
(12): 845-848, 2012.
Article
Dans Chinois
| WPRIM
| ID: wpr-242788
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the occupational exposure levels of dust in new suspension preheated dry process (NSP) cement production line and put forward rectification measures for dust-exposed posts, and to provide ideas for the modern cement production enterprises in dust control and occupational health management.</p><p><b>METHODS</b>Occupational health field investigation combined with field test were used to measure the time-weighted average concentration (C(TWA)) of the dust in the workplace. Rectification measures were taken for the dust-exposed posts with unqualified dust concentration, and the protective effects of dustproof facilities in the rectified workplace were evaluated.</p><p><b>RESULTS</b>The field investigation revealed incompletely closed dustproof facilities, improperly set dust hoods, excess of dust leakage points, and other problems in the dust-exposed posts of an NSP cement production line before rectification, and the dustproof facilities could hardly exert dust removal effect. The field test showed that the vast majority of dust-exposed posts had the dust concentrations exceeding the occupational exposure limits (OELs), with a qualified rate as low as 31.8%. A series of rectification measures were taken for these posts. After the rectification, the dust-exposed posts demonstrated dramatically dropped C(TWA), and the qualified rate of dust concentration in the dust-exposed posts rose to 90.9%.</p><p><b>CONCLUSION</b>The dust hazards in NSP cement production line cannot be ignored. Taking appropriate protective measures are critical for curbing dust hazards in modern cement production.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Exposition professionnelle
/
Lieu de travail
/
Matériaux de construction
/
Polluants atmosphériques d'origine professionnelle
/
Poussière
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Chinese Journal of Industrial Hygiene and Occupational Diseases
Année:
2012
Type:
Article
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