C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 11/08 (2006.01) C22B 1/02 (2006.01) C22B 3/00 (2006.01) C22B 3/24 (2006.01) C22B 3/44 (2006.01)
Patent
CA 2096605
Refractory sulfidic silver ore which is not amenable to cyanide leaching is formed into an aqueous slurry and oxidized at elevated temperature, usually about 150 to 250°C, in the presence of an oxidizing agent, usually oxygen, and in the presence of about 30 to about 160 g/L zinc. Zinc present in the above range results in increased extractability of silver from the oxidized residue by cyanide leaching.
Le minerai d'argent sulfuré réfractaire qui ne peut être traité par lessivage au cyanure est mis en boue aqueuse est oxydé à température élevée, habituellement environ 150 à 250 degrés C, en présence d'un agent oxydant, habituellement de l'oxygène, et de zinc, à raison d'environ 30 à 160 g/L. Dans cette plage de concentration, le zinc rend l'argent plus facile à extraire du résidu oxydé résultant du lessivage au cyanure.
Hayden Alfred S.
Patel Chandulal P.
Prime Resources Group Inc.
Ridout & Maybee Llp
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