METHOD FOR LEACHING CHALCOPYRITE CONCENTRATION
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United States of America Patent
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Issued Date -
May 3, 2012
app pub date -
Jun 10, 2010
filing date -
Jun 26, 2009
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method for leaching bulk concentrate of chalcopyrite-type by means of an aqueous solution containing sulphuric acid and an oxygen feed at atmospheric pressure and at a temperature between 75° C. and the boiling point of the solution. It is typical of the method that the particle size of the concentrate to be fed into leaching is in the region of 80% below 60-100 μm and that the concentrate is leached with an aqueous solution, the acid concentration of which is regulated to be around 20-90 g/l.
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