Title:
TREATMENT OF COMPOSITE SULFIDE RICH ORE
Document Type and Number:
Japanese Patent JPS59110739
Kind Code:
A
Abstract:
The invention relates to a method for selectively recovering the metal values of polymetallic sulphidic ore concentates that contain lead and/or gold and other precious metals. The concentrate is treated in the following combination of process stages: a) roasting (2) under magnetite yielding conditions b) sulphating (4) in an oxidising environment to convert non-ferrous metals to sulphate and/or oxysulphate form; c) leaching (5) in water or a weak aqueous solution of sulphuric acid to recover any copper, nickel, cobalt, zinc, uranium and molybdenum present, and at least part of the silver present; d) treating (10) the leaching residue from stage c), for example, by leaching in a solution of chloride of an alkali metal or an earth metal, or smelting said residue while slagging any iron content therein to recover the lead content and any silver remaining.
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Inventors:
TOOMASU KONRATSUDO MIYOOEN
Application Number:
JP21587583A
Publication Date:
June 26, 1984
Filing Date:
November 15, 1983
Export Citation:
Assignee:
BOLIDEN AB
International Classes:
C22B3/04; C22B3/00; C22B3/08; C22B3/10; C22B11/02; C22B11/06; C22B13/02; C22B13/08; C22B13/10; C22B15/00; C22B34/34; C22B60/02; (IPC1-7): C22B3/00
Attorney, Agent or Firm:
Minoru Nakamura
Previous Patent: JPS59110738
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