David Torres, Luís Ayala
Most copper minerals are found as sulfides, with chalcopyrite being the most abundant. However, this ore is refractory to conventional hydrometallurgical methods, so it has been historically exploited through froth flotation, followed by smelting operations. This implies that the processing involves polluting activities, either by the formation of tailings dams and the emission of large amounts of SO2 into the atmosphere. Given the increasing environmental restrictions, it is necessary to consider new processing strategies, which are compatible with the environment, and, if feasible, combine the reuse of industrial waste. In the present research, the dissolution of pure chalcopyrite was studied considering the use of MnO2 and wastewater with a high chloride content. Fine particles (−20 µm) generated an increase in extraction of copper from the mineral. Besides, it was discovered that working at high temperatures (80 ◦C) the large concentrations of MnO2 become irrelevant. The biggest copper extractions were observed under these conditions.
@article{790cdb03-bf6f-481e-8ab2-f54e9d15f660,
title={2020 Torres Chalcopyrite leaching with manganese dioxide and chloride},
author={David Torres and Luís Ayala},
year={2026},
language={en}
}TY - JOUR TI - 2020 Torres Chalcopyrite leaching with manganese dioxide and chloride AU - David Torres AU - Luís Ayala PY - 2026 LA - en ER -
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f
Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c
Alain Vignes
Extractive metallurgy is a critical field that encompasses the processes involved in the extraction of valuable metals from their ores. This work serv