发明名称 |
Pre-treatment for conventional cyanidation for silver recovering from manganese-argentiferous ores containing occluded silver |
摘要 |
The present invention discloses a treatment for recovering silver from ores containing occluded silver, predominantly pyrolusite, which includes a pre-treatment of the manganese-argentiferous ore with sulfur dioxide produced by roasting elemental sulfur, generating manganese sulphate, and pregnant solution with more than 90% silver recovery. |
申请公布号 |
US9410224(B2) |
申请公布日期 |
2016.08.09 |
申请号 |
US201414242199 |
申请日期 |
2014.04.01 |
申请人 |
Centro de Investigacion en Materiales Avanzados, S.C. |
发明人 |
Castillo Castillo Pedro;Orrantia Borunda Erasmo |
分类号 |
C22B11/00;C22B3/00;C22B11/08;C22B47/00 |
主分类号 |
C22B11/00 |
代理机构 |
Defillo & Associates, Inc. |
代理人 |
Defillo & Associates, Inc. ;Defilló Evelyn A. |
主权项 |
1. A pre-treatment process for a conventional cyanidation for a silver recovery from a manganese-argentiferous ore including occluded silver comprising:
a) grinding the manganese-argentiferous ore having the occluded silver while simultaneously adding water to obtain a pulp; b) classifying the pulp to obtain particles having a particle size of 74 μm and a percentage of solids between 25 and 30%; c) agitating the pulp of step b) at 450-500 rpm for 3 hours and at the same time injecting SO2 gas into the pulp of step b) to produce an ore pulp, the SO2 gas is produced by roasting sulfur; and d) adding hydrated lime or caustic soda to the ore pulp to obtain a pH of 10.5. |
地址 |
Chihuahua MX |