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    Author(s): J.Y. Zhu; F. Tan; R. Gleisner
    Date: 2005
    Source: Progress in paper recycling. Vol. 14, no. 4 (Aug. 2005): p. 21-29.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (200 KB)

    Description

    This study reports the feasibility of monitoring liquid and fiber rejection during froth flotation of fiber suspensions through conductivity measurements of the rejected froth. The technique was demonstrated in laboratory flotation experiments using nylon and wood fiber suspensions in two laboratory flotation cells. We found that both the total wet rejection and the fiber/solid consistency in the rejection stream correlate well to the measured relative conductivity of the rejected froth. Therefore, the relative conductivity of the froth can be used to monitor the liquid and fiber/solid content in froth. A conductivity sensor can be developed to monitor fiber, filler/ash, and wet/water rejection in flotation experiments. The immediate application of the conductivity technique described in this study is to monitor wet and fiber/solid rejection in industrial flotation deinking operations.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Zhu, J.Y.; Tan, F.; Gleisner, R. 2005. Monitoring liquid and solid content in froth using conductivity. Progress in paper recycling. Vol. 14, no. 4 (Aug. 2005): p. 21-29.

    Keywords

    Conductivity sensor, deinking, fiber loss, flotation, froth conductivity, froth control, froth drainage, paper recycling, reject control

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