System and method for parallel solution extraction of one or more metal values from metal-bearing materials
View Patent ↗The present disclosure relates to a process and system for recovery of one or more metal values using solution extraction techniques and to a system for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.
1. A metal value recovery system comprising:
a first metal-bearing solution;
a second metal-bearing solution; and
a solution extraction system comprising:
a first solution extraction circuit coupled to the first metal-bearing solution and to the second metal-bearing solution, and
a second solution extraction circuit coupled to the first metal-bearing solution.
2. The system of claim 1 , wherein the first metal-bearing solution is a high-grade pregnant leach solution.
3. The system of claim 2 , wherein the second metal-bearing solution is a low-grade pregnant leach solution.
4. The system of claim 3 , wherein the first metal-bearing solution and second metal-bearing solution comprise copper.
5. The system of claim 3 , wherein the first solution extraction circuit is configured to produce a low-grade raffinate.
6. The system of claim 5 , wherein the low-grade raffinate comprises a secondary metal value.
7. The system of claim 3 , wherein the first solution extraction circuit is configured to produce a rich electrolyte.
8. The system of claim 7 , wherein the second solution extraction circuit is configured to produce a rich electrolyte.
9. The system of claim 6 , wherein the secondary metal value is cobalt.
10. The system of claim 8 , wherein the rich electrolyte comprises copper.
11. A system for extracting metal value comprising:
a solution extraction system comprising a first circuit and a second circuit,
wherein the first circuit comprises at least two first circuit extractors and at least one first circuit stripping unit, wherein the second circuit comprises at least two second circuit extractors and a second circuit stripping unit, wherein the first circuit receives a first portion of a first metal bearing solution and a second metal bearing solution and the second circuit receives a second portion of a first metal bearing solution, and wherein the at least one first circuit stripping unit produces a rich electrolyte; and
a primary electrowinning circuit configured to extract a primary metal value from the rich electrolyte.
12. The system of claim 11 , wherein the first circuit further comprises a second first circuit stripping unit.
13. The system of claim 12 , wherein the second first circuit extractor produces an aqueous raffinate.
14. The system of claim 13 , further comprising a secondary electrowinning circuit configured to extract a secondary metal value from the aqueous raffinate.
15. The system of claim 11 , wherein the first metal bearing solution is high-grade pregnant leach solution.
16. The system of claim 11 , wherein the second metal bearing solution is low-grade pregnant leach solution.
17. The system of claim 13 , wherein the aqueous raffinate is a low-grade raffinate.