Evaluación del proceso de recuperación de sales de plomo de copelas usadas en la industria minera

Abstract

The main objective of this work was to evaluate the process of recovery of lead salts from the coplas used in the mining industry, using a physicochemical process in such a way as to allow the recovery of lead and thereby avoid the contamination that these wastes produce. The solutions used for Pb leaching were 10% acetic acid and citric acid 1M, using as fixed parameters the granulometry of the material (mesh 200 ASTM), ambient temperature (21oC), in addition to avoiding the use of alkaline reagents was worked without making pH adjustments to the solutions, while as variable parameters we worked with the solid liquid ratio 1:4 and 1:5, reaction times of 2 and 3 hours and as a last variable the use of a reducing agent (H2O2).

Obtaining 94.5% of Pb in extraction with 10% acetic acid solution with the addition of the reducing agent and in a 3 hour reaction time with a solid liquid ratio 1:5, instead when using citric acid in the same conditions only managed to recover 63.19%. It can therefore be concluded that using 10% acetic acid solutions is optimal for Pb extraction under these conditions.