C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
23/364, 23/411
C22B 3/00 (2006.01) B01D 11/02 (2006.01) C01G 7/00 (2006.01) C22B 3/02 (2006.01) B01D 11/00 (2006.01)
Patent
CA 1205983
ABSTRACT OF THE DISCLOSURE An introduction process and apparatus is described concerning the continuous elution of a value, i.e. a metal value such as gold, from a particulate carrier by a counter- flow of stripping liquid through the pressurized vessel in which the loaded particulate carrier is introduced to the vessel as a low velocity plug in a liquid carrier. The extraction process is also used with the continuous elution process in which the particulate material is extracted from the bottom part of a pressure vessel through a dis- charge pipe extending therefrom and in which a discharge liquid is introduced into the discharge pipe upstream of the discharge end under such pressure as to maintain a head of the discharge liquid upstream of that location and a flow of the liquid downstream from the location to transport the particulate material through the discharge pipe. The length of the pipe allows a pressure drop in the particulate material whereby it is discharged at ambient pressure without mechanical working of the material and the discharge liquid may also act to cool the material.
435051
Gowling Lafleur Henderson Llp
Ok Tedi Mining Limited
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