Method of controlling a grinding process in a pocket grinder

Details Method of controlling a grinding process in a pocket grinder Method of controlling a grinding process in a pocket grinder

D - Textiles, Paper

21

B

92/55

D21B 1/00 (2006.01) B02C 25/00 (2006.01) D21B 1/24 (2006.01) D21D 1/00 (2006.01)

Patent

CA 1210980

Abstract of the Disclosure A method of controlling a grinding process in a pocket grinder in which a batch of wood in at least one pocket is pressed against a rotating grindstone by means of a pressure shoe displaceable in the pocket. At pre- determined intervals an apparently produced amount of pulp is calculated at separate measuring points of the grinding stroke of the pressure shoe and the specific energy consumption calculated on the basis of this amount of pulp is compared to a target figure for the specific energy consumption. The batch grinding is adjusted depending on a deviation of the specific energy consumption from the target figure. The compaction of the batch in the pocket during the stroke of the pres- sure shoe is taken into account in the grinding adjust- ment by correcting the calculated apparently produced amount of pulp in relation to a change in the density of the batch to be ground so that the fluctuations in the fineness of the pulp produced at separate measuring points of the pressure shoe are maintained as small as possible during the grinding stroke of the pressure shoe. (Fig. 8)

416340

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