Treatment of bayer process wastes

C - Chemistry – Metallurgy – 02 – F

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C02F 1/56 (2006.01) B09B 3/00 (2006.01) C02F 11/00 (2006.01) C02F 11/12 (2006.01)

Patent

CA 2012097

ABSTRACT TREATMENT OF BAYER PROCESS WASTES Red mud filter cake from the Bayer process is mixed with particulate water-swellable water-insoluble polymer such that it can be pumped as a liquid and then rigidifies when placed on a mud stack. The polymer is applied as agglomerates of fine particles or as dispersions in water-immiscible solvent. The polymer is usually an anionic synthetic polymer, for instance formed from acrylic monomers and cross-linking monomer.

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