Title:
A recovery method of copper and zinc
Document Type and Number:
Japanese Patent JP6125913
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for efficiently recover copper and zinc from neutralizing precipitate containing copper and zinc.SOLUTION: A method for recovering copper and zinc from neutralizing precipitate containing iron, copper, zinc, aluminum, and a silica component includes: a step of preparing an acid solution containing copper, zinc, aluminum, and a silica component, except for an iron component using the neutralizing precipitate; and a step of precipitating and separating the aluminum and the silica component by oxidizing the acid solution. In the precipitating and separating step, the pH of the acid solution is 4.3-4.7, and the oxidation is preferably performed by directly injecting air into the acid solution. The recovery method further includes a step of treating waste water to obtain the neutralizing precipitate before the step of preparing the acid solution. The waste water is derived from an abandoned mine.
Inventors:
Suzuki Chisato
Kazuhiko Watanabe
Natsuka Ryumi
Kazuhiko Watanabe
Natsuka Ryumi
Application Number:
JP2013116635A
Publication Date:
May 10, 2017
Filing Date:
June 03, 2013
Export Citation:
Assignee:
Furukawa Metal Co., Ltd.
International Classes:
C22B15/00; C22B7/00; C22B19/20; C22B19/30
Domestic Patent References:
| JP2004202488A | ||||
| JP33010763B1 | ||||
| JP2003213342A |
Attorney, Agent or Firm:
Shinji Hayami