| 摘要 |
PCT No. PCT/SE79/00013 Sec. 371 Date Oct. 17, 1979 Sec. 102(e) Date Sep. 27, 1979 PCT Filed Jan. 18, 1979 PCT Pub. No. WO79/00634 PCT Pub. Date Sep. 6, 1979.Lignocellulose material is pretreated with steam, heat, lignin softening chemicals or combinations thereof. The pretreated material is then refined in a disc refiner. Water is added to the material in the refining zone of the disc refiner to form a suspension at concentration of 8-15% at the point of discharge from the gap between the discs of the refiner. Steam development and steam backflow from the gap is reduced. |
