CA2468855A1 - Process for the treatment of molybdenum concentrate - Google Patents

Process for the treatment of molybdenum concentrate Download PDF

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Publication number
CA2468855A1
CA2468855A1 CA 2468855 CA2468855A CA2468855A1 CA 2468855 A1 CA2468855 A1 CA 2468855A1 CA 2468855 CA2468855 CA 2468855 CA 2468855 A CA2468855 A CA 2468855A CA 2468855 A1 CA2468855 A1 CA 2468855A1
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CA
Canada
Prior art keywords
copper
pressure oxidation
process according
solution
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2468855
Other languages
French (fr)
Other versions
CA2468855C (en
Inventor
David L. Jones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CESL Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CA 2364213 external-priority patent/CA2364213A1/en
Application filed by Individual filed Critical Individual
Priority to CA 2468855 priority Critical patent/CA2468855C/en
Publication of CA2468855A1 publication Critical patent/CA2468855A1/en
Application granted granted Critical
Publication of CA2468855C publication Critical patent/CA2468855C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C22B15/0067—Leaching or slurrying with acids or salts thereof
    • C22B15/0069—Leaching or slurrying with acids or salts thereof containing halogen
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C22B15/0067—Leaching or slurrying with acids or salts thereof
    • C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/34—Obtaining molybdenum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

A method of treatment or purification of a molybdenum concentrate also containing copper, comprises the step of subjecting the molybdenum concentrate to pressure oxidation in the presence of oxygen and a feed solution containing copper (e.g. CuSO4) and halide (e.g. CuCl2) to produce a pressure oxidation solution containing copper and a solid residue containing molybdenum. The pressure oxidation solution may be combined with feed solution containing sulfuric acid to a second pressure oxidation in which a copper concentrate is treated for the recovery of copper therefrom.

Claims (31)

1. A process for the extraction of molybdenum and copper, comprising the steps of:

subjecting a molybdenum-copper concentrate to a first pressure oxidation in the presence of oxygen and a first feed solution containing copper and halide to produce a first copper containing solution and a solid residue containing molybdenum;

subjecting a copper concentrate to a second pressure oxidation in the presence of oxygen and a second feed solution containing copper and halide to produce a second copper containing solution and a solid residue;

subjecting the second copper containing solution to solvent extraction to produce a pregnant copper solution and a raffinate;

recycling a first portion of said raffinate as said second feed solution to the second pressure oxidation along with said first copper containing solution; and recycling a second portion of said raffinate as said first feed solution to the first pressure oxidation.
2. The process according to claim 1, further comprising the step of subjecting said second portion to neutralization prior to recycling the second portion to the first pressure oxidation.
3. The process according to claim 1, wherein said molybdenum-copper concentrate and said copper concentrate are obtained by subjecting a copper-molybdenum concentrate to a flotation process to produce a float comprising said molybdenum-copper concentrate and a tail comprising said copper concentrate.
4. The process according to claim 1, wherein the first and second pressure oxidations are carried out at a temperature of from about 115 °C to about 175 °C.
5. The process according to claim 4, wherein the pressure oxidations are carried out at a temperature of about 150 °C.
6. The process according to claim 1, wherein said second feed solution contains from about 0 g/L
to about 50 g/L free acid.
7. The process according to claim 6, wherein the copper in the first and second feed solutions has a concentration of about 10 to 20 g/L.
8. The process according to claim 7, wherein the concentration of copper in the feed solutions is about 15 g/L.
9. The process according to claim 1, wherein the halide is chloride and the chloride in the first and second feed solutions is maintained at a value of about 8 to 15 g/L.
10. A process according to claim 9, wherein the chloride an the feed solutions is maintained at a value of about 12 g/h.
11. The process according to claim 1, wherein the first pressure oxidation is carried out With a solids density of up to about 1000 g/L.
12. The process according to claim 11, wherein the solids density is about 500 g/L.
13. The process according to claim 1, wherein the first pressure oxidation is carried out with a solids density of about 250 to 800 g/L.
14. The process according to claim 1, wherein the second pressure oxidation is carried out With a solids density of about 120-300 g/L.
15. The process according to claim 1, wherein the copper is present as copper sulphate in the first and second feed solutions.
16. The process according to claim 1, wherein the halide is present as copper chloride in the first and second feed solutions.
17. A method of purification of a molybdenum concentrate contaminated with copper, comprising the step of subjecting the molybdenum concentrate to pressure oxidation in the presence of oxygen and a feed solution containing copper and halide to produce a pressure oxidation solution containing copper and a solid residue containing molybdenum.
18. The method according to claim 17, wherein the pressure oxidation is carried out at a temperature of from about 115 °C to about 175 °C.
19. The method according to claim 18, wherein the pressure oxidation is carried out at a temperature of about 150 °C.
20. The method according to claim 17, wherein the pressure oxidation is carried out under an oxygen pressure of about 350 to about 1800 kPa.
21. The method according to claim 17, wherein the copper in the feed solution has a concentration of about 10 to 20 g/L.
22. The method according to claim 21, wherein the concentration of copper in the feed solution is about 15 g/L.
23. The method according to claim 17, wherein the halide is chloride and the chloride in the feed solution is maintained at a value of about 10 to 15 g/L.
24. A method according to claim 23, wherein the chloride in the feed solution is maintained at a value of about 12 g/L.
25. The method according to claim 17, wherein the feed solution is provided by recycling at least part of the pressure oxidation solution to the pressure oxidation.
26. The method according to claim 25, wherein the pressure oxidation solution is subjected to copper solvent extraction to produce a pregnant copper solution and a raffinate and wherein at least part of the raffinate is recycled to the pressure oxidation.
27. The method according to claim 18, wherein the pressure oxidation is carried out with a solids density of about 1000 g/L.
28. The method according to claim 27, wherein the solids density is about 500 g/L.
29. The method according to claim 17, wherein the copper is present as copper sulphate in the feed solution.
30. The method according to claim 17, wherein the halide is present as copper chloride in the feed solution.
31. The method according to claim 17, wherein the pressure oxidation is carried out with a solids density of about 250 to 800 g/L.
CA 2468855 2001-12-03 2002-12-02 Process for the treatment of molybdenum concentrate Expired - Lifetime CA2468855C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2468855 CA2468855C (en) 2001-12-03 2002-12-02 Process for the treatment of molybdenum concentrate

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA 2364213 CA2364213A1 (en) 2001-12-03 2001-12-03 Process for the treatment of molybdenum concentrate
CA2,364,213 2001-12-03
PCT/CA2002/001852 WO2003048400A2 (en) 2001-12-03 2002-12-02 Process for the treatment of molybdenum concentrate also containing copper
CA 2468855 CA2468855C (en) 2001-12-03 2002-12-02 Process for the treatment of molybdenum concentrate

Publications (2)

Publication Number Publication Date
CA2468855A1 true CA2468855A1 (en) 2003-06-12
CA2468855C CA2468855C (en) 2010-06-01

Family

ID=32851580

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2468855 Expired - Lifetime CA2468855C (en) 2001-12-03 2002-12-02 Process for the treatment of molybdenum concentrate

Country Status (1)

Country Link
CA (1) CA2468855C (en)

Also Published As

Publication number Publication date
CA2468855C (en) 2010-06-01

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