en.Wedoany.com Reported - Mining company Pinnacle Silver and Gold Corp. has announced the results of the second round of preliminary metallurgical tests for the El Potrero gold-silver project in Durango, Mexico, showing gold recovery rates exceeding 97%. This phase of the study evaluated seven samples covering the historical Dos de Mayo vein (Dos de Mayo, Pinos Cuates, and La Dura), as well as the Estrella and Capulin veins, doubling the scope of the previous phase.

Test results indicate strong sample grades, with an average gold content of 7.7 grams per ton and silver content of 116 grams per ton. Bottle roll cyanidation leaching tests showed consistently high gold recovery rates, averaging 97.8% for the Dos de Mayo vein, 97.6% for the La Estrella vein, and 97.4% for the El Capulin vein.

Silver recovery rates exhibited greater variability due to more complex mineral compositions. When finely ground to 53 microns, the average silver recovery rate for the Dos de Mayo vein rose to 70.02%, while the La Estrella vein achieved 64.7% and the El Capulin vein reached 80.5%. TIMA-X mineralogical studies conducted at SGS Laboratories in Santiago, Chile, confirmed that gold exists in the form of electrum (a natural gold-silver alloy), while silver was identified as argentite/acanthite and aguilarite.

Company President and CEO Robert Archer stated that these baseline parameters provide room for subsequent optimization. He explicitly noted that the gravity separation circuit failed to optimize recovery rates, thus allowing the avoidance of adding this infrastructure in the final design, thereby saving unnecessary capital expenditures. These results provide critical information for optimizing the final process flow before formally rebuilding the processing plant.

This article is compiled by Wedoany. All AI citations must indicate the source as "Wedoany". If there is any infringement or other issues, please notify us promptly, and we will modify or delete it accordingly. Email: news@wedoany.com