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Continuous Monitoring of Coal by a Neutron Moisture Meter

Public Domain


Details

  • Personal Author:
  • Description:
    A nuclear method was developed for continuously and automatically determining the moisture content of coal flowing through a bin. Fast neutrons from a 1 curie americium-beryllium source penetrate the coal, are thermalized (slowed down) by hydrogen in the moisture, and are counted by a thermal neutron detector. The difference between the number of these thermal neutrons and those thermalized by dry coal (in a reference drum) is a measure of the moisture content of the coal. A materials handlings system was developed and in tests at a commercial coal preparation plant, moisture in coal was monitored continuously within 0.2 percent of values determined by conventional means. The meter responded rapidly to change in moisture content, making it adaptable to automatic process control, and was operated for 1 year without malfunction or recalibration. Shielding of the source by the coal kept the neutron flux level at the bin wall less than 1 milliroentgen per hour, a safe level for personnel. Work done in cooperation with the U.S. Steel Corporation. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Subseries:
    Report of Investigations
  • Document Type:
    Text
  • Genre:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-18
  • NIOSHTIC Number:
    nn:10009075
  • NTIS Accession Number:
    PB-225276
  • Citation:
    NTIS: PB 225 276 :18 pages
  • Federal Fiscal Year:
    1973
  • Peer Reviewed:
    False
  • Source Full Name:
    NTIS: PB 225 276
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:879c6ca519f9efbaed446228efac730b3b8daa7c2232025e7ba3a7dbfa456a3579097a3bcde00b2b1b5fefff5de9442892bafad3f4a13c4ccfc3f40e20a69bf6
  • Download URL:
  • File Type:
    Filetype[PDF - 6.94 MB ]
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