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US 9,370,779 B2Granted
Method and arrangement
AssigneeHaarla Oy
InventorsJohannes Haarla, Sakari Paunila, Markku Rislakki, Jouko Niinimäki, Mika Körkkö, Terhi Suopajärvi
Life of this patent
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Abstract
A method and an arrangement for treating stock formed of recycled fiber. The method comprises treating the stock in screen means and a flotation cell means, and screening the stock into accept and reject. Reject from the screening is directed to a mechanical dispergator and a dispersed reject is formed of it.
Claims10
Method for treating stock obtained by pulping fibre-containing raw material to release recycled fibre and removing contaminants therefrom, the method comprising:
- treating the stock in at least one screen means and a floatation cell means, and screening stock into accept and reject, directing the screen reject to a mechanical dispergator and forming a dispersed reject of it, and directing the dispersed reject back to the floatation cell means or to a floatation cell means of the dispergator and combining the product from said floatation cell means of the dispergator with an accept of screen means or floatation cell means.
Dependencies are inferred from the claim text.