Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium
Exotic type deposits include several species of minerals, such as atacamite, chrysocolla, copper pitch, and copper wad. Among these, copper pitch and copper wad have considerable concentrations of manganese. However, their non-crystalline and amorphous structure makes it challenging to recover the e...
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| Format: | Article |
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MDPI AG
2019-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/10/1112 |
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| author | Kevin Pérez Norman Toro Eduardo Campos Javier González Ricardo I. Jeldres Amin Nazer Mario H. Rodriguez |
| author_facet | Kevin Pérez Norman Toro Eduardo Campos Javier González Ricardo I. Jeldres Amin Nazer Mario H. Rodriguez |
| author_sort | Kevin Pérez |
| collection | DOAJ |
| description | Exotic type deposits include several species of minerals, such as atacamite, chrysocolla, copper pitch, and copper wad. Among these, copper pitch and copper wad have considerable concentrations of manganese. However, their non-crystalline and amorphous structure makes it challenging to recover the elements of interest (like Cu or Mn) by conventional hydrometallurgical methods. For this reason, black copper ores are generally not incorporated into the extraction circuits or left unprocessed, whether in stock, leach pads, or waste. Therefore, to dilute MnO<sub>2</sub>, the use of reducing agents is essential. In the present research, agitated leaching was performed to dissolve Mn of black copper in an acidic medium, comparing the use of ferrous ions and tailings as reducing agents. Two samples of black copper were studied, of high and low grade of Mn, respectively, the latter with a high content of clays. The effect on the reducing agent/black copper ratio and the concentration of sulfuric acid in the system were evaluated. Better results in removing Mn were achieved using the highest-grade black copper sample when working with ferrous ions at a ratio of Fe<sup>2+</sup>/black copper of 2/1 and 1 mol/L of sulfuric acid. Besides, the low-grade sample induced a significant consumption of H<sub>2</sub>SO<sub>4</sub> due to the high presence of gangue and clays. |
| first_indexed | 2024-12-10T13:09:16Z |
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| id | doaj.art-9b742eed89dd42639d5a2268ae4d2dfe |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-10T13:09:16Z |
| publishDate | 2019-10-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-9b742eed89dd42639d5a2268ae4d2dfe2022-12-22T01:47:45ZengMDPI AGMetals2075-47012019-10-01910111210.3390/met9101112met9101112Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid MediumKevin Pérez0Norman Toro1Eduardo Campos2Javier González3Ricardo I. Jeldres4Amin Nazer5Mario H. Rodriguez6Departamento de Ingeniería en Metalurgia y Minas, Universidad Católica del Norte, Antofagasta 1270709, ChileDepartamento de Ingeniería en Metalurgia y Minas, Universidad Católica del Norte, Antofagasta 1270709, ChileDepartamento de Ciencias Geológicas, Universidad Católica del Norte, Antofagasta 1270709, ChileDepartamento de Ingeniería en Metalurgia y Minas, Universidad Católica del Norte, Antofagasta 1270709, ChileDepartamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta 1270300, ChileDepartamento de Construcción, Universidad de Atacama, Copiapó 1531772, ChileLaboratorio de Metalurgia Extractiva y Síntesis de Materiales (MESiMat-ICB-UNCUYO-CONICET-FCEN, Padre Contreras 1300, Parque Gral. San Martín), CP 5500 Mendoza, ArgentinaExotic type deposits include several species of minerals, such as atacamite, chrysocolla, copper pitch, and copper wad. Among these, copper pitch and copper wad have considerable concentrations of manganese. However, their non-crystalline and amorphous structure makes it challenging to recover the elements of interest (like Cu or Mn) by conventional hydrometallurgical methods. For this reason, black copper ores are generally not incorporated into the extraction circuits or left unprocessed, whether in stock, leach pads, or waste. Therefore, to dilute MnO<sub>2</sub>, the use of reducing agents is essential. In the present research, agitated leaching was performed to dissolve Mn of black copper in an acidic medium, comparing the use of ferrous ions and tailings as reducing agents. Two samples of black copper were studied, of high and low grade of Mn, respectively, the latter with a high content of clays. The effect on the reducing agent/black copper ratio and the concentration of sulfuric acid in the system were evaluated. Better results in removing Mn were achieved using the highest-grade black copper sample when working with ferrous ions at a ratio of Fe<sup>2+</sup>/black copper of 2/1 and 1 mol/L of sulfuric acid. Besides, the low-grade sample induced a significant consumption of H<sub>2</sub>SO<sub>4</sub> due to the high presence of gangue and clays.https://www.mdpi.com/2075-4701/9/10/1112waste treatmentreducing agentmanganese |
| spellingShingle | Kevin Pérez Norman Toro Eduardo Campos Javier González Ricardo I. Jeldres Amin Nazer Mario H. Rodriguez Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium Metals waste treatment reducing agent manganese |
| title | Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium |
| title_full | Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium |
| title_fullStr | Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium |
| title_full_unstemmed | Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium |
| title_short | Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe<sup>2+</sup> as Reducing Agents in Acid Medium |
| title_sort | extraction of mn from black copper using iron oxides from tailings and fe sup 2 sup as reducing agents in acid medium |
| topic | waste treatment reducing agent manganese |
| url | https://www.mdpi.com/2075-4701/9/10/1112 |
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