Attrition mill operating characteristics.

Details

• Personal Author:
  Brooks DR ; Sadler LY III ; Stanley, Donald A.
• Description:
  The attrition mill is a device for mechanically reducing solid particle size by intense agitation of a slurry of material being milled and coarse milling media. For example, in 10 hours of milling, specific surfaces of 40 and 25 m2/g were obtained for alumina and barite, corresponding to 38 and 56 nm equivalent spherical diameter, respectively. Size reduction rates for relatively coarse particles were first-order and increased linearly with power input to the mill. Optimum milling medium concentration corresponded to medium particles moving a distance of approximately 0.7 of their diameter before collision with another such particle. Power characteristics of the attrition mill were essentially the same as those of a radial flow turbine mixer. Laminar flow became disrupted at NRe = 200, while turbulent flow was established at NRe > 8000. Slurries of fine powders exhibited the same linear power-average density dependence as single-phase liquids. However, a different dependence was observed with large particles. [Description provided by NIOSH]
• Subjects:
  Dust Occupational Health Particulate Matter Safety
• Keywords:
  Milling-industry; Particulate-dust; Dust-particles; Dust-exposure; Dust-analysis; Respirable-dust
• Series:
  Mining Publications
• ISSN:
  0032-5910
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Alabama ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TURC - Tuscaloosa Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  19-28
• Volume:
  12
• Issue:
  1
• NIOSHTIC Number:
  nn:10009615
• Citation:
  Powder Technol 1975 Jul; 12(1):19-28
• Federal Fiscal Year:
  1975
• Peer Reviewed:
  True
• Source Full Name:
  Powder Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/247159/cdc_247159_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]