Method and apparatus for refining fibrous material

Details Method and apparatus for refining fibrous material Method and apparatus for refining fibrous material

1987-04-10

1988-07-05

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With classifying or separating of material

241 28, 241 791, 2412591, 2412611, B02C 1912

Patent

active

047549351

ABSTRACT:
A refiner has a frusto-conically shaped grinding zone located between an outer housing and an inner frusto-conical rotor. The rotor has suitable openings for removing steam from the grinding zone inwardly into an interior chamber within the rotor. Multiple separation stages are provided in the rotor and between it and the housing, respectively, whereby separation of the steam and any following fibrous material particles is effected. By removing the steam from the grinding zone, increased retention time of the fibrous material in the grinding zone and increased production is effected.

REFERENCES:
patent: 3815834 (1974-06-01), Gilbert
patent: 4401280 (1983-08-01), Reinhall
Salmen, N. L. and Fellers, C., "The Fundamentals of Energy Consumption During Viscoelastic and Plastic Deformation of Wood", Trans. Tech. Sec. (Can. Pulp Pap. Ass.) 9 (4):TR 93 (1982).
Salmen et al., "Fatigue of Wood--Characterization of Mechanical Defibration", J. Pulp Pa. Sci. 11 (3):J 68 (1985).
Atack, D., "Fundamental Differences in Energy Requirement . . . ", Sven. Papperstidn. 84 (14):22 (1981).
Pearson, A. J., "Towards a Unified Theory of Mechanical Pulping . . . ", Paper presented at 1983 Mechanical Pulping Conf. Wash., D.C., Jun. 14, 1983.

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