Differential Pressure Response of 25-mm-Diameter Glass Fiber Filters Challenged with Coal and Limestone Dust Mixtures

Details

• Personal Author:
  Dobroski, Harry Jr. ; Timko, Robert J. ; Tuchman D ; Vinson R
• Description:
  This article summarizes results of research conducted by the National Institute for Occupational Safety and Health (NIOSH) at its Pittsburgh Research Laboratory. The objective of this work was to determine the correlation between the mass (M) of respirable coal and limestone dusts collected on 25-mm-diameter glass fiber filters mounted in cassettes and the increase in differential pressure (deltaP) that develops across the filters when drawing at constant air flow. Test aerosols were generated inside a laboratory dust chamber using various coal dusts, limestone dust, and mixes of the two. Dusts with different particle size distributions were deposited on the filters by sampling from the chamber through cyclone preclassifiers at different flow rates. Results show that the relationship between differential pressure increase (cm water) and dust mass (mg) is linear and can be approximated by the equation deltaP = KM. The K values (slopes) range from 1.14 to 1.64, depending on the parent coal of the samples. The influence of particle size distribution was also found. The overall K value for all the data summarized in this article is 1.35, with R2 = 0.84 for the summary equation. When calibrated for individual work sites, or other circumstances where great variability in dust characteristics is avoided, the relationship between collected dust mass and increase in differential pressure may provide an exploitable principle for measurement of respirable dust concentrations. [Description provided by NIOSH]
• Subjects:
  Coal Dust Minerals Mining Occupational Health Safety
• Keywords:
  Author Keywords: Dust Measurement Coal-dust Coal Dust Differential Pressure Dust-analysis Dust-particles Dust-sampling Dust Monitoring Filters Mineral-processing Mining-industry Pressure Drop Respirable-dust Sampling-equipment Stone-processing

  More +
• Series:
  Mining Publications
• ISSN:
  1047-322X
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  96-103
• Volume:
  17
• Issue:
  2
• NIOSHTIC Number:
  nn:20022689
• Citation:
  Appl Occup Environ Hyg 2002 Feb; 17(2):96-103
• Federal Fiscal Year:
  2002
• Peer Reviewed:
  True
• Source Full Name:
  Applied Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:1dcee035bf62f3d6dd66aec6d56063411e454d3b72494c58111d57d0084a938681a10305e20b4f8dd5cb26351360681f8bb8442be5bdc35e28a826fdaf64f53a
• Download URL:
  https://stacks.cdc.gov/view/cdc/220559/cdc_220559_DS1.pdf
• File Type:
  [PDF - 422.98 KB ]