Reducing-Effect of Chloride for the Dissolution of Black Copper
| Autor: | Ricardo I. Jeldres, Norman Toro, David Torres, Kevin Pérez, Eleazar Salinas-Rodríguez, Emilio Trigueros, Pedro Robles |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Curing (food preservation) Copper pitch Reducing agent Inorganic chemistry curing 0211 other engineering and technologies Agglomerate chemistry.chemical_element 02 engineering and technology Manganese 010502 geochemistry & geophysics 01 natural sciences Chloride 2506.10 Yacimientos Minerales copper pitch medicine Explotación de Minas General Materials Science Curing agglomerate Dissolution lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy 0105 earth and related environmental sciences copper wad Chemistry Extraction (chemistry) Metals and Alloys Pre-treatment pre-treatment Copper Copper wad Leaching (metallurgy) medicine.drug 5312.09 Minería |
| Zdroj: | Metals Volume 10 Issue 1 Repositorio Digital de la Universidad Politécnica de Cartagena Fundación Universitaria San Pablo CEU (FUSPCEU) Metals, Vol 10, Iss 1, p 123 (2020) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met10010123 |
| Popis: | Oxidized black copper ores are known for their difficulty in dissolving their components of interest through conventional methods. This is due to its non-crystalline and amorphous structure. Among these minerals, copper pitch and copper wad are of great interest because of their considerable concentrations of copper and manganese. Currently, these minerals are not incorporated into the extraction circuits or left untreated, whether in stock, leach pads, or waste. For the recovery of its main elements of interest (Cu and Mn), it is necessary to use reducing agents that dissolve the present MnO2, while allowing the recovery of Cu. In this research, the results for the dissolution of Mn and Cu from a black copper mineral are exposed, evaluating the reducing effect of NaCl for MnO2 through pre-treatment of agglomerate and curing, and subsequently leaching in standard condition with the use of a reducing agent (Fe2+). High concentrations of chloride in the agglomerate process and prolonged curing times would favor the reduction of MnO2, increasing the dissolution of Mn, while the addition of NaCl did not benefit Cu extractions. Under standard conditions, low Mn extractions were obtained, while in an acid-reducing medium, a significant dissolution of MnO2 was achieved, which supports the removal of Cu. |
| Databáze: | OpenAIRE |
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