Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
April 14, 2009
Patent Application Number
10544272
Date Filed
February 24, 2004
Patent Primary Examiner
Patent abstract
The invention relates to method for leaching zinc-containing materials in connection with the electrolytic recovery of zinc. According to this method, the feed materials i.e. zinc calcine and zinc sulphide, are leached in three stages, in which he sulphuric acid content of the stages rises in accordance with the direction in which the solids are moving. The solids and solution formed in the leaching stages are routed throughout the process countercurrently in relation to each other.
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