Procedure and apparatus for preparing groundwood...

Details Procedure and apparatus for preparing groundwood... Procedure and apparatus for preparing groundwood...

D - Textiles, Paper

21

D

92/43

D21D 5/18 (2006.01) D21B 1/12 (2006.01)

Patent

CA 1125077

ABSTRACT OF THE DISCLOSURE A process for mechanically producing groundwood from wood chips, the wood chips being treated, after pre-heating under pressure in a steaming chamber, in two steps in disk grinders operating under pressure, these disk grinders having feeding means of enclosed construction. The groundwood coming from the first stepdisk grinder is conducted under the pressure of the steam generated in the blade interval of the grinder to the feeding means of the second step disk grinder. The transport of the groundwood is performed along a pipeline which is directly connected to the feeding means of the second step disk grinder. In said feeding means feeding problems arising from floating of the groundwood in the steam flow discharging from the second disk grinder against the ground- wood flow is eliminated by feeding into the pipeline water or a chemical solution, which increases to the specific gravity of the groundwood.

347930

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