Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Reexamination Certificate
2005-09-20
2009-12-22
Bos, Steven (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
C423S099000, C423S139000, C075S743000
Reexamination Certificate
active
07635457
ABSTRACT:
The disclosed invention provides a process for enhanced recovery of one or more metal values from heap and/or dump leaching of ores containing the metal values, the process comprising:(a) providing a high grade leach solution obtained by heap or dump leaching of fresh high grade ore containing a first metal value;(b) subjecting the high grade leach solution to a first solvent extraction of the first metal value and applying the resulting first aqueous raffinate to leach fresh high grade ore;(c) providing a low grade leach solution obtained by heap or dump leaching of partially leached ore or fresh low grade ore of the first metal value; and(d) subjecting the low grade leach solution to a second solvent extraction of the first metal value, separate from the first solvent extraction of the first metal value, and applying the resulting separate, second aqueous to leach partially leached ore or fresh low grade ore,wherein the first and second aqueous raffinates are not intermixed prior to being applied to their respective ores for leaching. Alternatively, the first and second raffinates may be intermixed prior to being applied to their respective ores for leaching, providing that the aqueous raffinate applied to fresh high grade ore comprises at least 60% by volume of the first aqueous raffinate and the aqueous raffinate applied to partially leached ore or fresh low grade ore comprises at least 60% by volume of the second aqueous raffinate.
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Dagoberto Ibaceta and Juan Garrido Dos Amigos, Cemin and Hans Hein and Gabriel Araya Cognis: SX Development at Dos Amigos in Northern Chile. Presented by Hans Hein.
Hein Hans C.
Kordosky Gary A.
Nisbett Andrew
Bos Steven
COGNIS IP Management GmbH
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