# US 2013/0239752 A1 · Method of leaching copper ore

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- Number: US 2013/0239752 A1
- Document ID: US20130239752A1
- Status: Published application
- Kind: A1
- Application number: 13/765,729
- Filed: 2013-02-13
- Published: 2013-09-19
- Earliest claimed: 2012-03-14
- Assignees: JX Nippon Mining & Metals Corporation
- Applicants: Jx Nippon Mining & Metals Corporation
- Inventors: Katsuyuki SATO; Manabu MANABE
- Web page: https://patentgrep.com/patent/US20130239752A1

## CPC

- C22B 15/0067: {with acids or salts thereof}
- C22B 3/04: by leaching (C22B3/18 takes precedence)
- C22B 15/0069: {containing halogen}
- Y02P 10/20: Recycling
- C22B: PRODUCTION AND REFINING OF METALS (electrolytic C25); PRETREATMENT OF RAW MATERIALS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Provided is a method of leaching copper ore which contains chalcopyrite, the method includes a first leaching stage based on an oxidative leaching reaction of copper by iron (III) ion, and a second leaching stage, in succession to the first leaching stage, using a solution containing iodide ion and iron (III) ion.

## Claims

### Claim 1

A method of leaching copper ore which contains chalcopyrite, the method comprising a first leaching stage based on an oxidative leaching reaction of copper by iron (III) ion, and a second leaching stage, in succession to the first leaching stage, using a solution containing iodide ion and iron (III) ion.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the first leaching stage is proceeded until yield of leaching of secondary copper sulfide ore in the copper ore reaches 80% or above.

### Claim 3 (depends on 1)

The method according to claim 1, wherein in the first leaching stage 1 to 3 m3 of leaching solution per one ton of ore is provided to thereby leach the copper sulfide ore.

### Claim 4 (depends on 3)

The method according to claim 3, wherein in the first leaching stage the leaching solution has an iron (III) ion concentration of 2 to 5 g/L.