Treatment of black copper with the use of iron scrap - Part l
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Abstract
Currently, there is a large amount of mineral resources not being exploited in large copper mining, a clear example is black copper minerals. These resources are generally not incorporated into the extraction circuits or are not treated, either in stocks, leach pads, or debris. These exotic minerals have considerable amounts of Cu and Mn, which represent a commercial attraction. They are refractory to conventional leaching processes, therefore, for their treatment, the use of reducing agents is necessary to be able to dissolve the MnO2 present in them, which in turn allows Cu extraction. In this research, a comparative study is presented between two iron reducing agents (Fe2+ y Fe0) for the dissolution of Cu and Mn from a black copper mineral in an acidic medium, in addition, a previous pre-treatment process will be carried out (agglomerate and cure) adding NaCl to favour the reduction of MnO2. Finally, it was discovered that there is a higher kinetics of dissolution of Cu and Mn when working with Fe0 in short periods of time, although similar extractions of both elements are obtained in prolonged times. While carrying out a pre-treatment process adding NaCl, it allows to increase Cu and Mn extractions, allowing to obtain high solutions in short periods of time (30 min).
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