Systems and methods for copper recovery via roasting and leaching

Patent metadata

Field	Value
Publication number	US-10246789-B2
Application number	US-201615099966-A
Country	US
Kind code	B2
Filing date	Apr 15, 2016
Priority date	Dec 20, 2011
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.

First claim

The invention claimed is:

1. A process comprising:
roasting a metal bearing material comprising a copper carbonate under oxidizing conditions, at a temperature between about 625° C. and about 675° C.;
roasting the metal bearing material under reducing conditions, at a temperature of about 500° C. or greater; and
leaching the metal bearing material in a basic medium to yield a pregnant leach solution.

2. The process of claim 1 , wherein the basic medium c…

Assignees

• Freeport Minerals Corp

Inventors

• Robertson Joanna M
• Bolles Thomas R
• Hazen Wayne W
• May Lawrence D
• Smith Jay C
• Baughman David R

Classifications

• C22B3/22

  Chemistry & Metallurgy · mapped topic

• C22B23/005

  Chemistry & Metallurgy · mapped topic

• C22B23/0446

  Chemistry & Metallurgy · mapped topic

• C25C5/02

  Chemistry & Metallurgy · mapped topic

• C22B15/0078

  Chemistry & Metallurgy · mapped topic