La presencia de contaminantes como el arsénico y el antimonio en los concentrados polimetálicos puede generar pérdidas económicas, debido a las penalidades impuestas en los contratos de comercialización cuando se superan los límites permitidos. Por esta razón, el presente trabajo se enfoca en respaldar la reducción de estos contaminantes a través de la aplicación de lixiviación alcalina con NaOH y Na2S en los concentrados polimetálicos. Los ensayos de microscopía óptica indicaron la presencia de especies con alto contenido de arsénico y antimonio conocidos como cobres grises y sulfosales de plata. En base a la caracterización mineralógica se logró solubilizar 93.79% de arsénico y 96.21% de antimonio, en un tiempo de cuatro horas, a la temperatura de 100°C, con una dosificación de 48 kg/TM de hidróxido de sodio y 13 kg/TM de sulfuro de sodio, a una granulometría de ...

Ore from the Yarusyacán District was analyzed in this research study, revealing the presence of sphalerite type 2, with a particle size ranging from 35 to 150 microns. Other species found included quartz, pyrite, pyrrhotite, calcium and potassium silicates, calcium carbonates, galena, chalcopyrite, and iron hydroxides. Based on the mineralogical characterization, laboratory tests were conducted that showed that dosing a secondary collector known as cuprocyanide can control the recovery and quality of the zinc concentrates in the third cleaning feed.  Results showed that a 35 g/t dosage of cuprocyanide recovered 73.80% of zinc, whereas a 50 g/t dosage recovered only 52.94%. This demonstrated that both zinc grade and recovery increase when cuprocyanide is dosed in greater quantities; however, the excess of this reagent tends to decrease said values.

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 ...