Fundamental Factors That Affect Dust Generation

Details

• Personal Author:
  Leith D
• Description:
  Factors that affect the amount and size distribution of dust generated by falling granular material in still air were examined using an apparatus with separate dust generating and measuring sections. Four granular materials were tested and a simple model was developed to describe the dust generation rate of these materials as a function of particle size, drop height, material flow, and moisture content. Moisture content strongly influenced the interparticle binding forces and the amount of dust generated. Drop height and material flow influenced the material separation forces and also showed significant influence on the amount of dust generated. In a second study, four factors that affect dust generation (test material, size distribution of the test material, moisture content of the test material, and the apparatus used for the tests) were investigated. Dust generated from silicon-carbide (409212) and aluminum-oxide (1344281) were measured using magnetic resonance imaging and Heubach dustiness testers. The size distribution of the test material slightly influenced the amount but strongly influenced the size distribution of the dust generated. Increased moisture content decreased the amount of dust generated but had little influence on dust size distribution. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Dust Occupational Health Particulate Matter Safety
• Keywords:
  Airborne-dusts Airborne-particles Control-technology Dust-particles NIOSH-Grant Physical-properties
• Series:
  Grant Final Reports
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  North Carolina ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-60
• NIOSHTIC Number:
  nn:00200823
• NTIS Accession Number:
  PB92-109255
• Citation:
  Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina, 1991 May; :1-60
• Contact Point Address:
  Epidemiology, University of North Carolina, Rosenau Hall 201 H, Chapel Hill, NC 27514
• CAS Registry Number:
  Alumina (CAS RN 1344-28-1) ; Silicon monocarbide (CAS RN 409-21-2)
• Federal Fiscal Year:
  1991
• NORA Priority Area:
  Research Tools and Approaches: Control Technology and Personal Protective Equipment
• Performing Organization:
  University of North Carolina Chapel Hill, Chapel Hill, North Carolina
• Peer Reviewed:
  False
• Start Date:
  19871201
• Source Full Name:
  Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina
• End Date:
  19901130
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b0c2afe2d67ea87912950fa4294160b9b0472cad3731375431cbc45e4bbf31313f37edf7000a611c1f13d712ee62f935d1204db1d95471fa118ec7c9a10dcec1
• Download URL:
  https://stacks.cdc.gov/view/cdc/217804/cdc_217804_DS1.pdf
• File Type:
  [PDF - 1.32 MB ]