A mineralogical characterization study to optimize lead-silver (Pb-Ag) recovery rate by flotation was conducted at three adits named Esmeralda, Orión, and Hércules. The variables investigated included the dosage of the reagent blend (AP-3418/AR-404), AR-242, and pH. At the Esmeralda adit, a recovery of 81.99% lead at a concentrate grade of 58.66% and 83.79% silver at a head grade of 310.64 oz/t was achieved using a dosage of 18 g/t reagent blend (AP-3418/AR-404), 5 g/t AR-242, and an optimum pH value of 11.5. At the Orión adit, a recovery of 81.71% lead at a concentrate grade of 61.6%, and 81.24% silver at a head grade of 85.39 oz/t were achieved using a dosage of 30 g/t reagent blend (AP-3418/AR-404), 5 g/t AR-242, and an optimum pH value of 10.5. Finally, at the Hércules adit, a recovery of 82.4% lead at a concentrate grade of 54.12%, and 80.88% silver at a head grade of 62.63 oz/t...

The gold-silver artisanal operations carried out throughout the Peruvian territory are characterized by having low recoveries of precious metals, being carried out in poor working conditions and generating negative consequences in the ecosystem, which was the basis of the approach to our problem. For this, a representative sample of a batch of amalgamation tailings in the department of Puno was investigated with a tested head of 19.58 gr/TM of Au, 159.67 gr/TM of Ag and 10.53 ppm of Hg. The optical microscopy report indicated the presence of gold, pyrite, magnetite, hematite, Ilmenite, rutile and gangue. With the results of the mineralogical characterization, leaching tests were carried out with ecological reagents for a sample with a regrind granulometry of 87 microns, such as: Sandioss, which reached a recovery of 99.25% Au and 93.14% Ag, with a consumption of 22.56 kg/TM for a period ...