Characterization of copper smelter slag and recovery of residual metals from these residues
The pyrometallurgical copper extraction process generates 2.2 t of residues for each ton of produced metal. Initially, this paper shows the physical and chemical characterization of a copper processing residue, followed by the procedure to obtain the gold and silver that are contained in the copper...
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| Format: | Article |
| Language: | English |
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Universidad Pedagógica y Tecnológica de Colombia
2017-01-01
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| Series: | Revista Facultad de Ingeniería |
| Subjects: | |
| Online Access: | http://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772 |
| _version_ | 1818063225627869184 |
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| author | Luver Echeverry-Vargas Néstor Ricardo Rojas-Reyes Edgar Estupiñán |
| author_facet | Luver Echeverry-Vargas Néstor Ricardo Rojas-Reyes Edgar Estupiñán |
| author_sort | Luver Echeverry-Vargas |
| collection | DOAJ |
| description | The pyrometallurgical copper extraction process generates 2.2 t of residues for each ton of produced metal. Initially, this paper shows the physical and chemical characterization of a copper processing residue, followed by the procedure to obtain the gold and silver that are contained in the copper residue. The characterization of a white metal oxidized calcine indicates a high content of copper as cupric ferrite, and important values of gold and silver. Gold and silver concentrations were 38.5 g t-1 and 1085 g t-1, respectively. The gold was found scattered in cupric ferrite grains, while the silver was dissolved in a matrix of Cu-S in amounts between 1 % and 50 %. Cyanidation tests showed that 95 % gold recovery could be obtained with a concentration of 0.06 g l-1 KCN, a pH of 10.5, room temperature, and a residence time of 80 h. When the temperature was increased to 75 °C, and the other cyanidation parameters were maintained intact, the same recovery was obtained but with a shorter residence time. Silver recovery was less than 30 % with a concentration of 1.2 g l-1 KCN, pH of 10.5, temperature of 45 °C, and a residence time longer than 72 h. |
| first_indexed | 2024-12-10T14:16:43Z |
| format | Article |
| id | doaj.art-48e25397a3f24e8ebef9eba5ca5d557a |
| institution | Directory Open Access Journal |
| issn | 0121-1129 2357-5328 |
| language | English |
| last_indexed | 2024-12-10T14:16:43Z |
| publishDate | 2017-01-01 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | Article |
| series | Revista Facultad de Ingeniería |
| spelling | doaj.art-48e25397a3f24e8ebef9eba5ca5d557a2022-12-22T01:45:19ZengUniversidad Pedagógica y Tecnológica de ColombiaRevista Facultad de Ingeniería0121-11292357-53282017-01-012644617110.19053/01211129.v26.n44.2017.57725772Characterization of copper smelter slag and recovery of residual metals from these residuesLuver Echeverry-Vargas0Néstor Ricardo Rojas-Reyes1Edgar Estupiñán2M. Sc. Universidad Nacional de Colombia (Medellín-Antioquía, Colombia).Ph.D. Universidad Nacional de Colombia (Medellín-Antioquía, Colombia).Ph. D. Universidad de Tarapacá (Tarapacá, Chile).The pyrometallurgical copper extraction process generates 2.2 t of residues for each ton of produced metal. Initially, this paper shows the physical and chemical characterization of a copper processing residue, followed by the procedure to obtain the gold and silver that are contained in the copper residue. The characterization of a white metal oxidized calcine indicates a high content of copper as cupric ferrite, and important values of gold and silver. Gold and silver concentrations were 38.5 g t-1 and 1085 g t-1, respectively. The gold was found scattered in cupric ferrite grains, while the silver was dissolved in a matrix of Cu-S in amounts between 1 % and 50 %. Cyanidation tests showed that 95 % gold recovery could be obtained with a concentration of 0.06 g l-1 KCN, a pH of 10.5, room temperature, and a residence time of 80 h. When the temperature was increased to 75 °C, and the other cyanidation parameters were maintained intact, the same recovery was obtained but with a shorter residence time. Silver recovery was less than 30 % with a concentration of 1.2 g l-1 KCN, pH of 10.5, temperature of 45 °C, and a residence time longer than 72 h.http://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772copper smelter slagcyanidationgoldsilver |
| spellingShingle | Luver Echeverry-Vargas Néstor Ricardo Rojas-Reyes Edgar Estupiñán Characterization of copper smelter slag and recovery of residual metals from these residues Revista Facultad de Ingeniería copper smelter slag cyanidation gold silver |
| title | Characterization of copper smelter slag and recovery of residual metals from these residues |
| title_full | Characterization of copper smelter slag and recovery of residual metals from these residues |
| title_fullStr | Characterization of copper smelter slag and recovery of residual metals from these residues |
| title_full_unstemmed | Characterization of copper smelter slag and recovery of residual metals from these residues |
| title_short | Characterization of copper smelter slag and recovery of residual metals from these residues |
| title_sort | characterization of copper smelter slag and recovery of residual metals from these residues |
| topic | copper smelter slag cyanidation gold silver |
| url | http://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772 |
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