Method and apparatus for on-line monitoring of specific surface

Details Method and apparatus for on-line monitoring of specific surface Method and apparatus for on-line monitoring of specific surface

1979-05-14

1981-06-30

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

73 61R, 73 614, 162 55, 162263, 209211, 356339, 356342, D21F 706, G01N 2100

Patent

active

042761190

ABSTRACT:
The specific surface distribution of a pulp may be obtained by fractionating the pulp in a hydrocyclone means into an overflow and an underflow fraction and measuring the specific surface of each of the fractions and the amount of each of the fractions and based on a cumulative normal distribution relationship of cumulative weight fraction as a percent of feed to specific surface, determining the specific surface distribution for said pulp.
Also disclosed is a method and apparatus for determining the specific surface of a pulp sample by measuring the light scattering characteristics to obtain a turbidity measurement of the pulp sample, measuring the consistency of the sample and determining the specific surface of said pulp based on the relationship of specific surface to the turbidity measurement for the measured consistency of the pulp.

REFERENCES:
patent: 2858727 (1958-11-01), Stamm et al.
patent: 3786261 (1974-01-01), Tucker
patent: 3802964 (1974-04-01), Forgacs et al.
patent: 3879129 (1975-04-01), Inoue
patent: 4135389 (1979-01-01), Karnis et al.
Johnson et al., "Determination of Dangerous Shives," Paper Given at International Mechanical Pulping Conf. 1973, Jun. 1973.

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