Solid material comminution or disintegration – Processes – Wood and similar natural-fibrous vegetable material
Patent
1982-11-09
1985-09-17
Goldberg, Howard N.
Solid material comminution or disintegration
Processes
Wood and similar natural-fibrous vegetable material
241 30, 241 34, B02C 2318
Patent
active
045415714
ABSTRACT:
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 a pressure shoe displaceable in the pocket. At predetermined 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 pressure shoe is taken into account in the grinding adjustment 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.
Karna Anssi
Liimatainen Heikki
Goldberg Howard N.
Gorski Joseph M.
OY Tampella AB
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