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    Measurement of Consistency of Pulpwood-Water Slurry Based on Neutron Slowing-Down and Diffusion

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    An analysis based on Fermi age approximation is used to explore the feasibility of using neutron migration phenomena to monitor the consistency, and possibly also the fiber density, in pulpwood-water slurries of the type processed in the pulp and paper industry. The results of preliminary experimental work are also presented. A significant experimental result is that the consistency of a 3 percent mixture of sulfite pulp in water may be monitored with a relative precision of ± 3 percent (or ±0.09 percentage points) in a sampling time of 1 s.


    neutron radiography, nondestructive tests, neutrons, pulpwood, monitors, slurries, diffusion, consistency

    Author Information:

    Hewitt, JS
    Associate professor, University of Toronto, Toronto, Ontario

    Slobodian, VM
    Chemical engineer, B. F. Goodrich Canada, Shawinigan, Quebec

    Committee/Subcommittee: E07.05

    DOI: 10.1520/STP33930S