Low speed low intensity chip refining

Details Low speed low intensity chip refining Low speed low intensity chip refining

D - Textiles, Paper

21

D

D21D 1/30 (2006.01) D21D 1/00 (2006.01)

Patent

CA 2333047

In the mechanical refining of wood chips to produce wood pulp, wood pulp quality is improved by employing low refining intensity at least in a final refining stage; the refining is carried out in a double disc refiner or a single disc refiner at rotational speeds that are lower than those conventionally employed, specifically at less than 1200 RPM in a double disc refiner and at less than 1500 RPM in a single disc refiner.

Lors du raffinage mécanique des copeaux en vue de la production de pâte à papier, il est possible d'améliorer la qualité de la pâte en travaillant sous faible intensité, au moins au cours de la phase de raffinage finale. Le raffinage s'effectue dans un raffineur à disque simple ou double, à des régimes moins élevés que ceux couramment utilisés, soit à moins de 1200 tr/mn pour un raffineur à disque double et à moins de 1500 tr/mn pour un raffineur à disque simple.

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