Disposal of thixotropic muds

Details Disposal of thixotropic muds Disposal of thixotropic muds

B - Operations, Transporting

09

B

362/31, 61/45

B09B 5/00 (2006.01) C02F 1/42 (2006.01)

Patent

CA 1108319

ABSTRACT The specification describes a method of depositing and solidifying thixotropic mud such as red mud, which comprises filtering, washing and mechanically liquefying the mud and then transferring it to a dump for solidification. The mechanical liquefaction is performed on moist mud having a solids content of over 30% by weight and in the presence of an electrolyte. The dump is provided with at least one retaining embankment for discharging meteoric water by hydraulic action. The embankment contains at least one substance having cation exchanging properties whereby alkali metal ions absorbed by the water from the mud are removed from the water before it is dis- charged. With the same ground area and the same storage height, approximately 1.4 times as much red mud in the moist state can be stored by the above method as in conventional dumping. Also the dump height can be increased to 3 to 4 times that of a conventional dump. Therefore, a storage capacity of 4 to 6 times the conventional methods is available by the above method.

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