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Dust controls for the bagging of dry chemicals: a case study.
Appl Ind Hyg 1989 Jul; 4(7):161-165
Available dust controls for the bagging of dry chemicals were evaluated at an industrial facility to identify dust sources and determine the effectiveness of current controls. The facility used force flow packer units to fill bags with a dry powder on either a manual or automatic packaging system. Combinations of ventilation, booths, enclosures, hoppers, work practices, and other controls were used. An automatic system, with well designed capture hoods and high exhaust ventilation rates, provided dust control resulting in average personal respirable dust (APRD) exposures below 0.02mg/m3. Personal exposure levels using the manual system provided dust control with APRD exposures of 0.07mg/m3. The control measures contained 95 percent of the area respirable dust concentrations generated during normal packaging operations to below 0.08mg/m3. Manual bag handling, leaks from ancillary operations within the packaging room, and/or poor work practices or improper work station design were responsible for higher worker exposure. The author concludes that an effective dust control measure must eliminate dust generation or contain it before the worker is exposed; as each packaging operation is unique, the best combination of dust control measures must be determined for each operation.
NIOSH-Author; Dust-control; Dust-control-equipment; Industrial-design; Dust-exposure; Industrial-exposures; Chemical-processing; Occupational-hazards; Workplace-studies; Industrial-dusts; Ventilation-systems;
Issue of Publication
Applied Industrial Hygiene
Page last reviewed: October 26, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division