Freeman Ntuli, Edison Muzenda
The effects of ammonia concentration and leaching time were investigated to determine the optimum leaching conditions for extracting copper from Ni-Cu matte. Experiments were conducted using a leaching cell submerged in a water bath, with ammonia concentrations varying from 1.5 M to 3.0 M and leaching times ranging from 0 to 300 minutes. The Ni-Cu matte utilized in this study contained 23% by mass of copper. Results indicated that increased ammonia concentration led to higher recovery rates, with a maximum copper recovery of 32.86% achieved with a 3 M ammonia solution after 130 minutes of leaching. Interestingly, while longer leaching times generally enhanced copper recovery for all concentrations tested, the use of 2 M ammonia yielded a higher copper extraction compared to the higher concentrations, potentially due to the cementation effect where nickel displaces copper as it is more electronegative. Additionally, at elevated ammonia concentrations, greater nickel extraction was observed. These findings highlight the complex interplay between leaching time and ammonia concentration in optimizing metal recovery from leachates.
@article{303bb825-c8b5-48bb-a6f5-5e76ad797d36,
title={The Effect of Leaching Time and Ammonia Concentration on the Atmospheric Leaching of Copper},
author={Freeman Ntuli and Edison Muzenda},
year={2023},
language={en}
}TY - JOUR TI - The Effect of Leaching Time and Ammonia Concentration on the Atmospheric Leaching of Copper AU - Freeman Ntuli AU - Edison Muzenda PY - 2023 LA - en ER -
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