Jesus L Valenzuela, Soto Uribe Juan Carlos

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The kinetics of the direct pressure oxidation/cyanidation was found to be strongly dependent on particle size, concentration of sodium cyanide, temperature and pH.
Single stage direct pressure oxidation/cyanidation, has proven to be effective in treating pyrite refractory gold and silver concentrates from Bacís mining, for both gold and silver it was found that the precious metals recovery exceeded 96%.

According to the results it can see that you get recovery above 90% for samples with a pH between 9 and 10, this shows that the process of electrocoagulation may be used for the recovery of precious metals.
The technique of X-Ray diffraction shows iron species formed during the process of EC, species such as silver, magnetite and lepidocrocite among others.
Using scanning electron microscopy shows silver absorbed on iron species.
This process of EC may be a substitution of the Merrill Crowe Process and Activated Carbon used to date for the recovery of gold and silver. What makes the process of electrocoagulation attractive are its low operating costs.
Translated title of the contributionRecuperación de Oro y Plata por Cianuración Oxidación a Presión y Electrocoagulación
Original languageAmerican English
Title of host publicationArizona SME Conference 2015
StatePublished - 5 Dec 2015

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