Magnetic susceptibility of minerals in high magnetic fields
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Magnetic susceptibility of minerals in high magnetic fields

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  • English
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    Details:

    • Personal Author:
      Dahlin, D. C. (David Clifford), 1951-
    • Corporate Authors:
      United States. Bureau of Mines.
    • Description:
      "The U.S. Bureau of Mines investigated the magnetic susceptibility of minerals as a function of magnetic field strength to determine how it might affect the potential for high-field magnetic separation as an alternative to other separation technologies. Single-mineral concentrates were prepared from specimens from the same deposit to compare magnetic susceptibilities of minerals that occur together and from specimens from different deposits to compare magnetic susceptibilities of like minerals. A vibrating-sample magnetometer with a superconducting magnet capable of producing a magnetic field of 7.16 X 10(6) A/m (90 kOe) was used to measure the magnetic moment of the samples. The data were then converted to specific magnetic susceptibility data and plotted as a function of magnetic field strength. Cursory studies were also completed on the effects of iron content and oxidation roasts on magnetic susceptibility in high fields. The results showed that magnetic susceptibility is essentially constant in magnetic fields above those needed to saturate ferromagnetic constituents. Although magnetic susceptibility is influenced by iron content and by thermal treatment, the changes are not large enough to influence separations in fields above 1.59 x 10(6) A/m (20 kOe)." - NIOSHTIC-2

      NIOSH no. 10003174

    • Subject:
    • Series:
      Report of investigations (United States. Bureau of Mines) ; 9449
    • Document Type:
      Report
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