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(11)    Patent No :    AP 2038   
(21)    Application No :    AP/P/2005/003388   
(22)    Filing Date :    07.01.2004   
(24)    Date of Grant &    04.09.2009   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
GB    0310419.7    07.05.2003

(84)    Designated State

BW    GM    GH    KE    LS   MW  MZ   SL   SD
SZ    T Z    UG    ZM    ZW
 

(73) Applicant(s)

CIBA SPECIALTY CHEMICALS WATER TREATMENTS

LIMITED, Cleckheaton Road, Low Moor, Bradford, West
Yorkshire BD12 0JZ,

United Kingdom

(72) Inventors

McCOLL Philip, Australia

SCAMMEL Stephen, Australia

(74) Representative

HONEY & BLANCKENBERG
 

(51)  International  Classification   C02F 1/56 (2006.01)    C02F 11/00 (2006.01)
C02F 1/54 (2006.01)   


(54)    Title

Treatment of aqueous suspensions

(57)    Abstract

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 rigidiflcation step is of high clarity.

(56)    Documents Cited :    GB 826 770 A    US 4 701 264 A    EP 0 314 855 A

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