Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production
US6605184B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Oct 5, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus treat fiber based material so as to reduce the loss of mineral fractions in the treatment of broke in paper production. Broke is a reusable raw material from a paper machine that contains mineral fractions which are desirably returned to the process as a raw material. The material containing minerals is dispersed into broke pulp, which is fractionated, and the accepts from the fractionation are returned to the paper manufacturing process providing for efficient and economical recovery of the minerals in broke. The mineral fraction provided in the rejects from the fractionation is treated separately before it is reused as filler or coating material in the production of paper or board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.