B - Operations – Transporting – 03 – C
Patent
B - Operations, Transporting
03
C
209/87
B03C 1/02 (2006.01) B03C 1/032 (2006.01)
Patent
CA 1313165
ABSTRACT OF THE DISCLOSURE A process which is especially useful for effecting magnetic separation of magnetically attractable impunities from an aqueous clay slurry or suspension includes passing the suspension through a porous, ferromagnetic matrix while applying a magnetic field to the matrix, on which impurities are collected, and thereafter regenerating the matrix by flushing collected impurities therefrom with a flush liquid, e.g., water. The improvement comprises, after discontinuing the passage of the suspension through the matrix, but before passing flush liquid therethrough, admitting a pressurized gas, e.g., compressed elf, into the separator to displace suspension retched therein, and recovering the displaced suspension. In addition, flush liquid retched in the ma- trix after the flushing step may be displaced therefrom by the compressed air. By displacing the retained suspension from the matrix with, e.g., compressed air, instead of a flush liquid, e.g., water, the retched suspension is not diluted by flush water and is recovered instead of sewered as in the prior art processes.
545324
Engelhard Corporation
Sim & Mcburney
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