Title:
METHOD FOR HIGH PRESSURE OXIDATION LEACHING OF METAL SULFIDE
Document Type and Number:
Japanese Patent JP2019143173
Kind Code:
A
Abstract:
To provide a method for high pressure oxidation leaching of a metal sulfide capable of reducing a loss of a recovery target metal.SOLUTION: In a method for high pressure oxidation leaching, when continuously supplying a raw material slurry containing a metal sulfide to an autoclave 1 having a plurality of reaction chambers 14a-14e and applying high pressure oxidation leaching to the metal sulfide to obtain a metal sulfate solution, solution temperature of a slurry in the first chamber 14a to which the raw material slurry is first supplied from among the plurality of reaction chambers 14a-14e is adjusted to 140-174°C. Solubility of the metal sulfate in a liquid phase of the slurry can be prevented from lowering and precipitation of the metal sulfate can be suppressed. As a result, a solid content density of leachate can be lowered, and a loss of a recovery target metal can be reduced.SELECTED DRAWING: Figure 1
Inventors:
SHIBAYAMA KEISUKE
YOKOGAWA TOMOHIKO
NAKAMURA SHINICHIRO
WATANABE YUUKAI
YOKOGAWA TOMOHIKO
NAKAMURA SHINICHIRO
WATANABE YUUKAI
Application Number:
JP2018025694A
Publication Date:
August 29, 2019
Filing Date:
February 16, 2018
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
C22B23/00; B01J3/02; B01J3/04; C22B3/04
Domestic Patent References:
| JP2017186589A | 2017-10-12 | |||
| JP2017149609A | 2017-08-31 | |||
| JP2016003360A | 2016-01-12 |
Attorney, Agent or Firm:
Yamauchi Patent Office