On-line monitoring of specific surface of mechanical pulps

Details On-line monitoring of specific surface of mechanical pulps On-line monitoring of specific surface of mechanical pulps

G - Physics

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73/58

G01N 33/00 (2006.01) D21F 7/00 (2006.01) G01B 21/28 (2006.01) G01N 15/06 (2006.01) G01N 15/08 (2006.01) G01N 21/27 (2006.01) G01N 21/53 (2006.01) G01N 33/34 (2006.01)

Patent

CA 1123626

ON-LINE MONITORING OF SPECIFIC SURFACE OF MECHANICAL PULPS ABSTRACT OF DISCLOSURE 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.

327137

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