System and method for parallel solution extraction of one or more metal values from metal-bearing materials

Patent metadata

Field	Value
Publication number	US-9856570-B2
Application number	US-201615240383-A
Country	US
Kind code	B2
Filing date	Aug 18, 2016
Priority date	Dec 20, 2011
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

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.

First claim

What is claimed is:

1. A metal value recovery system comprising:
a primary metal value recovery system;
a secondary metal value recovery system; and
a solution extraction system comprising:
a first solution extraction circuit coupled to the primary metal value recovery system and to the secondary metal value recovery system, and
a second solution extraction circuit coupled to the primary metal value recovery system.

2. The system of claim 1 , wherein the primary metal value recovery system comprises one of an electrowinning circuit, a sulphidation system, a precipitation system, and an ion exchange system.

3. The system of claim 2 , wherein the primary metal value recovery system comprises an electrowinning circuit.

4. The system of claim 1 , wherein the first solution extraction circuit and the second solution extraction circuit are configured to produce a rich electrolyte.

5. The system of claim 4 , wherein the rich electrolyte is in fluid communication with the primary metal value recovery system.

6. The system of claim 4 , wherein the first solution extraction circuit is configured to produce a high-grade raffinate and a low-grade raffinate.

7. The system of claim 6 , wherein the low-grade raffinate is in fluid communication with the secondary metal value recovery system.

8. The system of claim 7 , wherein the secondary metal value recovery system is configured to perform a selective precipitation process to produce a precipitated metal ion and a secondary electrolyte.

9. The system of claim 8 , wherein the precipitated metal ion is uranium.

10. The system of claim 8 , wherein the low-grade raffinate comprises a secondary metal value.

11. The system of claim 10 , wherein the secondary metal value recovery system further comprises a secondary electrowinning circuit configured to extract a secondary metal value from the secondary electrolyte.

12. The system of claim 11 , wherein the secondary metal value is cobalt.

13. The system of claim 4 , wherein the high-grade raffinate is recycled to a reactive processing system.

14. A system for extracting metal value comprising:
a solution extraction system comprising a first circuit and a second circuit,
wherein the first circuit is configured to receive a first metal bearing solution and to produce a first rich electrolyte;
wherein the second circuit is configured to receive the first metal bearing solution and to produce a second rich electrolyte; and
wherein the first circuit is configured to receive a second metal bearing solution and to produce a low-grade raffinate;
a primary electrowinning circuit configured to extract a primary metal value from the first rich electrolyte and the second rich electrolyte; and
a secondary metal value recovery system configured to extract a secondary metal value from the low-grade raffinate.

15. The system of claim 14 , wherein the low-grade raffinate comprises a secondary metal value comprising at least one of silver, platinum group metals, molybdenum, zinc, nickel, cobalt, uranium, rhenium, rare earth and actinide metals.

16. The system of claim 15 , wherein the secondary metal value recovery system is configured to perform a selective precipitation process to precipitate a metal ion.

17. The system of claim 16 , wherein the metal ion comprises uranium.

18. The method of claim 17 , wherein the secondary metal value recovery system comprises a secondary electrowinning circuit.

19. The method of claim 18 , wherein the secondary metal value comprises cobalt.

20. The method of claim 19 , wherein the second metal-bearing solution is a low-grade pregnant leach solution.

Assignees

• Freeport Minerals Corp

Inventors

• Raman Anand
• Morgan Jason M
• Savage Barbara J
• Meadows David G
• Hazen Wayne W

Classifications

• C22B60/0221

  by leaching · CPC title

• C22B23/0407

  Leaching processes · CPC title

• B01D11/0488

  Flow sheets · CPC title

• C22B61/00

  Obtaining metals not elsewhere provided for in this subclass (iron C21) · CPC title

• C22B19/00

  Obtaining zinc or zinc oxide · CPC title