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Related Experiment Videos

Reducing workers' dust exposure during bag stacking in enclosed vehicles.

A B Cecala1, A Covelli, E D Thimons

  • 1U.S. Department of Interior, Pittsburgh Research Center, PA 15236-0070.

American Industrial Hygiene Association Journal
|February 1, 1989
PubMed
Summary

This study evaluated cost-effective ventilation systems to reduce worker dust exposure in enclosed railcars and trucks during bagged material loading. An optimized exhaust system significantly lowered dust levels in the work area.

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Mining engineering·2018

Area of Science:

  • Occupational Health and Safety
  • Industrial Hygiene
  • Mineral Processing Engineering

Background:

  • Enclosed vehicles used for bagged material loading lack mechanical ventilation.
  • This leads to high dust concentrations, posing health risks, especially with hazardous materials like silica sand.
  • Workers stacking bags experience the highest dust exposures in mineral processing plants.

Purpose of the Study:

  • To evaluate cost-effective ventilation systems for enclosed vehicles during bagged product loading.
  • To reduce worker dust exposure in railcars and trailer trucks.
  • To identify the most effective ventilation strategy for mineral processing plants.

Main Methods:

  • Qualitative laboratory evaluation using a methane tracer gas technique in a railcar.

Related Experiment Videos

  • Comparison of blowing, exhaust, and push-pull ventilation systems.
  • Field evaluation of optimized exhaust ventilation systems in a silica sand processing plant.

    • Main Results:

    • An exhaust system positioned over the conveyor was most effective in reducing tracer gas levels.
    • The optimal field-evaluated system involved exhausting 54.5 m3/min (2000 ft3/min) through a tube.
    • The most effective setup featured a fiberglass tube 1.1 m past the slinger at a 2.0-m height.

    Conclusions:

    • Exhaust ventilation is a viable and effective method for reducing dust exposure during bagged material loading.
    • Optimized exhaust system design and placement are crucial for maximizing effectiveness.
    • Implementing such systems can significantly improve worker safety in mineral processing environments.