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The mineralogy characterization of concentrate of lead from the district of Zimapan Hidalgo, México, it has been done in order to identify the presence of ternary sulfides whose prevalence in the by-products it attribute to complex nature. These mineral species contain an important concentration of silver, the extraction represents an important added value for the concentrate and its study opens the way to the development of new leaching processes for the subsequent recovery of the precious metal. For the characterization process, the combination of analytical techniques, such as: Polarization Optical Microscopy (POM), Scanning Electron Microscopy (SEM) with energy dispersion spectrometer (EDS) and X-ray diffraction (XRD). The results of the chemical-granulometric analysis confirmed the presence of silver in an average concentration of 3.6 kg / ton., and determined that the greatest distribution of silver in the concentrate is found in the set of bounded particles. The results of the characterization were complementary for each of the aforementioned techniques and reported an argentiferous mineralization, consisting mainly of Ag sulfosalts such as tetrahedrite, freibergite (Ag4.2As0.12Cu5.82Fe1.56S13Sb3.88Zn0.42), polubasite (Ag3.1As0.203CuS22Sb3.793), and to a lesser extent acantite (Ag2S), the presence of associated base metals in the form of sulfides was also observed. The matrix of the mineral sample corresponds to galena (PbS).

Identificación de sulfuros complejos de plata (Sulfosales) contenidos en un concentrado de Pb, del distrito minero de Zimapán Hgo,