Flotation process and mixing device
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United States of America Patent
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-
Oct 10, 2000
Grant Date -
N/A
app pub date -
Apr 15, 1997
filing date -
Apr 17, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The flotation process for separating particulate impurities from fibrous suspensions in a flotation tank. Upon or after entry into the flotation tank, the fibrous suspension added to the flotation tank may be mixed with a portion of the suspension already in the flotation tank. The portion of the suspension already in the flotation tank may be drawn into the added suspension. After mixing, the mixed suspensions enter a mixing element. The mixed suspension is expelled into the flotation tank and a circular flow pattern is generated within the flotation tank as a result. A flow speed may be limited at a top end so that an optimal mixing with the gas bubbles required for flotation may occur with a desired energy savings.
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