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: | Online |
| Language: | eng |
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Universidad Pedagógica y Tecnológica de Colombia
2017
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772 |
| _version_ | 1801706076295397376 |
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| author | Echeverry-Vargas, Luver Rojas-Reyes, Néstor Ricardo Estupiñán, Edgar |
| author_facet | Echeverry-Vargas, Luver Rojas-Reyes, Néstor Ricardo Estupiñán, Edgar |
| author_sort | Echeverry-Vargas, Luver |
| collection | OJS |
| 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. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-5772 |
| institution | Revista Facultad de Ingeniería |
| language | eng |
| publishDate | 2017 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-57722022-06-15T16:19:55Z Characterization of copper smelter slag and recovery of residual metals from these residues Echeverry-Vargas, Luver Rojas-Reyes, Néstor Ricardo Estupiñán, Edgar copper smelter slag cyanidation gold silver 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. Universidad Pedagógica y Tecnológica de Colombia 2017-01-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion investigation application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772 10.19053/01211129.v26.n44.2017.5772 Revista Facultad de Ingeniería; Vol. 26 No. 44 (2017); 61-71 Revista Facultad de Ingeniería; Vol. 26 Núm. 44 (2017); 61-71 2357-5328 0121-1129 eng https://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772/4715 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772/6393 |
| spellingShingle | copper smelter slag cyanidation gold silver Echeverry-Vargas, Luver Rojas-Reyes, Néstor Ricardo Estupiñán, Edgar Characterization of copper smelter slag and recovery of residual metals from these residues |
| 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 |
| topic_facet | copper smelter slag cyanidation gold silver |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/5772 |
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