Process for cleaning chemical cellulose pulp by screening and ap

Details Process for cleaning chemical cellulose pulp by screening and ap Process for cleaning chemical cellulose pulp by screening and ap

1983-07-01

1985-03-12

Hart, Charles

Solid material comminution or disintegration

Processes

With classifying or separating of material

241 28, 209 17, 162 55, B02C 2308, B03B 700, D21H 500

Patent

active

045040168

ABSTRACT:
Process and apparatus are provided for cleaning chemical pulp by screening, in which the rejects from a first screening stage are rescreened in a second screening stage; the accepts from the second screening stage are separated in a hydrocyclone, and the clean fraction recycled to the first screening stage; the rejects from the second screening stage are beaten in a refiner and screened before or after the refiner; the suspension from the refiner is taken to the screen before the refiner, and the rejects from the screen after the refiner are recycled to the refiner.

REFERENCES:
patent: 3301745 (1967-01-01), Coppick et al.
patent: 3411720 (1968-11-01), Jones et al.
patent: 3791917 (1974-02-01), Bolton

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