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Title:
鉱石からの有価金属回収のための塩酸存在下での浸出プロセス
Document Type and Number:
Japanese Patent JP5563763
Kind Code:
B2
Abstract:
A process is described for leaching a value metal from an ore containing said value metal, the process including the steps of leaching the ore in the presence of hydrochloric acid so as to form a soluble metal-chloride salt in a leach solution; adding sulphuric acid and/or sulphur dioxide to the leach solution; recovering a solid metal-sulphate or metal-sulphite salt from the leach solution; regenerating hydrochloric acid; and continuously transferring at least a portion of the regenerated hydrochloric acid in solution to the vapour phase. The vapourised hydrochloric acid is then captured and returned to the leaching step. The sulphuric acid and/or sulphur dioxide may be added to the leach solution during or after the leaching step. The value metal is typically selected from the group consisting of Zn, Cu, Ti, Al, Cr, Ni, Co, Mn, Fe, Pb, Na, K, Ca, platinum group metals and gold. The metal in the metal-sulphate or sulphite salt may be the value metal, or may be a metal of less value than the value metal, such as magnesium.

Inventors:
Steel, Johann Dutoit
Summit, Jan Cert
Application Number:
JP2008542854A
Publication Date:
July 30, 2014
Filing Date:
November 28, 2006
Export Citation:
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Assignee:
Anglo Operations Limited
International Classes:
C22B3/04; C22B3/44; C22B19/20; C22B23/00
Domestic Patent References:
JP2008533293A
JP2008518093A
JP61136920A
JP2007530778A
Foreign References:
US20040228783
Attorney, Agent or Firm:
Takashima Ichi