Concentración de oro de material de mina a través de técnicas metalúrgicas extractivas

Abstract

Abstract: The material from the Nambija mining sector registered a head grade of 4.8 mg/kg gold, determined by fire assay. Within the mineralogical characterization of the material, pyrite (1,16%) and chalcopyrite (2,34%) were established as gold ore, so the sample contains refractory gold. The following minerals were determined as gangue: uvarovite (49,9%), hendenbergite (14,3%), quartz (18,3%), kaolinite (1,3%), cristobaline (5,6%), albite (7,1%), where different processes were used to establish gold recovery, The recovery percentages of 68,75%, 80,83% and 80,83% were obtained through metallurgical balances and yield calculations, and the recovery percentages were obtained for the following processes: Knelson centrifugal gravimetric concentration, flotation and cyanidation 29,16%. The most feasible process for the type of material was the flotation of sulfide minerals, where different reagents were used, chosen according to the mineralogy of the material: as primary collector Z6 (100 g/t), secondary collector MT-4095 (50 g/t), frother ER-370 (100 g/t), sodium silicate depressant (250 g/t) and as pH regulator nitric acid (250 g/t). A schedule composed of three flotations was also designed, for later unification, which makes it a bulk flotation.