Visualizing Air Bubbles in Pulp Suspensions Common to Recycling Operations, 1999 Recycling Symposium Proceedings

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Christopher R. Ashley and Theodore J. Heindel
Institute of Paper Science and Technology

Flotation deinking is one unit operation typically used to remove ink and toner particles from recovered paper. Air is injected into a fiber suspension and contaminant particles attach to the bubble surface. The contaminants are carried to the surface of the flotation unit by the air bubbles for eventual removal. Understanding the bubble flow characteristics is very important for effective flotation cell operation, but visualizing this process is very difficult. This study uses flash x-ray radiography (FXR) to observe air flows in repulped unprinted copy paper suspensions at consistencies as high as 5% by weight. FXR images of these flows are presented and qualitative observations are described.

Author: Ashley, C.R., Heindel, T.J.
Visualizing Air Bubbles in Pulp Suspensions Common to Recycl
Visualizing Air Bubbles in Pulp Suspensions Common to Recycling Operations, 1999 Recycling Symposium Proceedings
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