Hydrometallurgical Treatment of Converter Dust from Secondary Copper Production: A Study of the Lead Cementation from Acetate Solution

Minerals

卷:11

Alexandra Kollová¹  Jarmila Trpčevská¹  Martina Laubertová¹  Beatrice Plešingerová¹  Jaroslav Briančin² 

[1] Faculty of Materials, Metallurgy and Recycling, Technical University of Košice, 042 00 Košice, Slovakia;

[2] Institute of Geotechnics SAS, Slovak Academy of Sciences, Watsonova 45, 040 01 Košice, Slovakia;

关键词: hydrometallurgy;    converter dust;    secondary copper;    cementation;    lead;   

DOI  :  10.3390/min11121326

来源: DOAJ

【 摘 要 】

The subject of interest in this study was lead cementation with zinc from solution after conventional agitate acidic leaching of converter dust from secondary copper production. The kinetics of lead cementation from an acid solution of lead acetate using zinc powder was studied. The optimal cementation conditions for removing lead from the solution were determined to have a stirring intensity of 300 rpm, a zinc particle size distribution <0.125–0.4> mm and an ambient temperature. Under these conditions, an almost 90% efficiency in removing lead from solution was achieved. The cementation precipitate contains Pb, and a certain amount of Cu. Lead is present in the cementation precipitate in the PbO, Pb₅O₈ and Pb(Cu₂O₂) phases. The solution after cementation was also refined from copper. The solution can be used for further processing in order to obtain a marketable Zn-based product. The resulting cementation precipitate can be further processed and modified to obtain a lead-based product. A kinetic study of the process of lead cementation from solution was also carried out. Based on experimental measurements, the value of apparent activation energy (Ea) which was found to be ~18.66 kJ·mol⁻¹, indicates that this process is diffusion controlled in the temperature range 293–333 K.

【 授权许可】

Unknown