Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production
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United States of America Patent
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Aug 12, 2003
Grant Date -
N/A
app pub date -
Oct 5, 2000
filing date -
Mar 12, 1998
priority date (Note) -
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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.
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