Treatment of aqueous suspensions

C - Chemistry – Metallurgy – 02 – F

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C02F 11/00 (2006.01) C02F 1/56 (2006.01)

Patent

CA 2515581

A process in which material comprising an aqueous liquid with dispersed particulate solids is transferred as a fluid to a deposition area, then allowed to stand and rigidify, and in which rigidification is improved whilst retaining the fluidity of the material during transfer, by combining with the material an effective rigidifying amount of aqueous solution of a water- soluble polymer. The process is particularly suitable for the treatment of the tailings underflow resulting from a mineral processing operation and the co- disposal of fine and coarse tailings fractions. In addition, liquor released during the rigidification step is of high clarity.

La présente invention concerne un procédé selon lequel de la matière comprenant un liquide aqueux dans lequel sont dispersées des particules solides, est transférée sous la forme d'un liquide vers une zone de dépôt dans laquelle elle stagne et se solidifie, la solidification étant améliorée tout en conservant la fluidité de la matière au cours du transfert, grâce à la combinaison de la matière avec une quantité efficace pour la solidification d'une solution aqueuse d'un polymère soluble dans l'eau. Le procédé convient particulièrement au traitement du courant de fond de résidus miniers résultant d'opérations de traitement minéral et à la co-élimination des fractions de déchets miniers fines et grossières. De plus, la liqueur résultant de l'étape de solidification a une clarté élevée.

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