GB825216A - Method of producing wood pulp - Google Patents
Method of producing wood pulpInfo
- Publication number
- GB825216A GB825216A GB12243/56A GB1224356A GB825216A GB 825216 A GB825216 A GB 825216A GB 12243/56 A GB12243/56 A GB 12243/56A GB 1224356 A GB1224356 A GB 1224356A GB 825216 A GB825216 A GB 825216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- pulp
- wood
- mill
- fiberized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
Abstract
825,216. Making wood pulp. BAUER BROS. CO. April 20, 1956 [April 21, 1955], No. 12243/56. Class 96. In the production of ground wood pulp from raw uncooked wood, the raw wood is chipped, the chips are fiberized by successive applications and releases of pressure, the fiberized material is refined by further fiberization, and the refined fiberized material is cleaned and screened. In Fig. 1 raw wood passes through a chipper 1 and the chips are introduced into a soaking vat 2. the vat also containing, if desired, a wetting agent or softening agent, e.g. sodium hydroxide. Treatment by soaking may, however, be omitted. The chips are passed to a rotary press 3 in which they are fiberized by successive applications and releases of pressure from a rotating helical feed screw, thereby expelling moisture and natural fluids from the wood, e.g. sap, rosin, which are disposed of as by-products. Material leaving the press 3 is preferably wetted and passed to an attrition mill 4, which may be of the rotary disc type and consisting of a single or double disc mill, and then to a second attrition mill 5 to complete the refining by further fiberization. The pulp passes to a centrifugal cleaner 6 to remove dirt, dark specks, &c., which are rejected as waste, while the pulp is graded by a rotary screen 7 from which any insufficiently fiberized pieces are returned to the rotary press 3. Material passed by the rotary screen comprises finished pulp of the ground wood type. In modifications of the process of Fig. 1, (a) the positions of clearer 6 and screen 7 are reversed; (b) rejects from screen 7 are passed to mill 4 instead of press 3; (c) steps (a) and (b) are combined; (d) screen 7 is interposed between mills 4 and 5 and the acceptable products from screen 7 then by-pass mill 5 to cleaner 6 while rejects from the screen pass to the mill 5, thereby preventing over-refining of pulp material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US825216XA | 1955-04-21 | 1955-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB825216A true GB825216A (en) | 1959-12-09 |
Family
ID=22171733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12243/56A Expired GB825216A (en) | 1955-04-21 | 1956-04-20 | Method of producing wood pulp |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB825216A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2410079A1 (en) * | 1977-11-29 | 1979-06-22 | Escher Wyss Gmbh | Waste paper conditioning equipment - with outlet channels to carry heavy matter from fiberiser back for further sepn. |
CN102677523A (en) * | 2012-05-28 | 2012-09-19 | 东莞海龙纸业有限公司 | Production process of raw material for coated white board paper |
CN104988789A (en) * | 2015-05-29 | 2015-10-21 | 东莞玖龙纸业有限公司 | Method for making low basis weight manila board from wood fiber |
CN112726245A (en) * | 2021-02-02 | 2021-04-30 | 李亚龙 | Wood fiber production process |
-
1956
- 1956-04-20 GB GB12243/56A patent/GB825216A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2410079A1 (en) * | 1977-11-29 | 1979-06-22 | Escher Wyss Gmbh | Waste paper conditioning equipment - with outlet channels to carry heavy matter from fiberiser back for further sepn. |
CN102677523A (en) * | 2012-05-28 | 2012-09-19 | 东莞海龙纸业有限公司 | Production process of raw material for coated white board paper |
CN102677523B (en) * | 2012-05-28 | 2015-04-15 | 东莞玖龙纸业有限公司 | Production process of raw material for coated white board paper |
CN104988789A (en) * | 2015-05-29 | 2015-10-21 | 东莞玖龙纸业有限公司 | Method for making low basis weight manila board from wood fiber |
CN112726245A (en) * | 2021-02-02 | 2021-04-30 | 李亚龙 | Wood fiber production process |
CN112726245B (en) * | 2021-02-02 | 2024-01-26 | 李亚龙 | Wood fiber production process |
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