Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore
The main objectives of this article were to firstly decrease the amount of sulfide in the (Volcanic Massive Sulfide –VMS) in the eastern Sudan (Ariab) area through a roasting pretreatment, secondly determine the best and optimum (thiosulfate concentration – ammonia concentration – copper sulfate con...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715623000681 |
| _version_ | 1827920670561927168 |
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| author | AL motasim Tambal Abdalla Suliman Abdelmajid Ibrahim Essam Mohamed Mohammed Kabashi |
| author_facet | AL motasim Tambal Abdalla Suliman Abdelmajid Ibrahim Essam Mohamed Mohammed Kabashi |
| author_sort | AL motasim Tambal |
| collection | DOAJ |
| description | The main objectives of this article were to firstly decrease the amount of sulfide in the (Volcanic Massive Sulfide –VMS) in the eastern Sudan (Ariab) area through a roasting pretreatment, secondly determine the best and optimum (thiosulfate concentration – ammonia concentration – copper sulfate concentration - leaching time – pH) for extracting silver sulfide metal (Ag2S) also known as argentite from the same ore, thirdly using sodium cyanide concentration equal to the optimum thiosulfate concentration obtained from the experiments to determine which solvent is better at the same concentrations thiosulfate or cyanide.The leaching process took place at different concentrations, times, following a roasting pre-treatment at (300–400-500–600-700 °C), The Analytics of (ICP) and (XRF) showed that silver concentration is (10.91 PPM), iron is (15.76 PPM) and copper is (119.16 PPM), and the (SEM) analysis showed that Sulfur is present in the proportion of (26 %) in the ore, and from the study of fractions it became clear that the highest presence of silver was at the size (-106 + 75) micron.It was found that the best roasting temperature was (700 °C), and the best extraction using sodium thiosulfate was (61.06 %) at thiosulfate concentration (0.2 M) and ammonia concentration (0.2 M), time (6) hours, copper sulfate concentration (0.05 M), pH (10) and pulp density (25 %) at room temperature. As for sodium cyanide at the same concentration (0.2 M), it was found that the extraction was (49.47 %) at time (6) hours, pH (10), and pulp density (25 %). At room temperature, it was clear that cyanide was less efficient at (0.2 M) concentration than thiosulfate in dissolving silver. |
| first_indexed | 2024-03-13T04:13:52Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2211-7156 |
| language | English |
| last_indexed | 2024-03-13T04:13:52Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Chemistry |
| spelling | doaj.art-b04b22ab48fa4340bfa5c2b1944d796a2023-06-21T06:52:11ZengElsevierResults in Chemistry2211-71562023-01-015100829Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide oreAL motasim Tambal0Abdalla Suliman1Abdelmajid Ibrahim2Essam Mohamed3Mohammed Kabashi4Department of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, P.O. Box Khartoum 10257, Omdurman 382, SudanDepartment of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, P.O. Box Khartoum 10257, Omdurman 382, SudanDepartment of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, P.O. Box Khartoum 10257, Omdurman 382, SudanDepartment of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, P.O. Box Khartoum 10257, Omdurman 382, SudanDepartment of Mining Engineering, Faculty of Engineering Sciences, Omdurman Islamic University, P.O. Box Khartoum 10257, Omdurman 382, Sudan; School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Corresponding author.The main objectives of this article were to firstly decrease the amount of sulfide in the (Volcanic Massive Sulfide –VMS) in the eastern Sudan (Ariab) area through a roasting pretreatment, secondly determine the best and optimum (thiosulfate concentration – ammonia concentration – copper sulfate concentration - leaching time – pH) for extracting silver sulfide metal (Ag2S) also known as argentite from the same ore, thirdly using sodium cyanide concentration equal to the optimum thiosulfate concentration obtained from the experiments to determine which solvent is better at the same concentrations thiosulfate or cyanide.The leaching process took place at different concentrations, times, following a roasting pre-treatment at (300–400-500–600-700 °C), The Analytics of (ICP) and (XRF) showed that silver concentration is (10.91 PPM), iron is (15.76 PPM) and copper is (119.16 PPM), and the (SEM) analysis showed that Sulfur is present in the proportion of (26 %) in the ore, and from the study of fractions it became clear that the highest presence of silver was at the size (-106 + 75) micron.It was found that the best roasting temperature was (700 °C), and the best extraction using sodium thiosulfate was (61.06 %) at thiosulfate concentration (0.2 M) and ammonia concentration (0.2 M), time (6) hours, copper sulfate concentration (0.05 M), pH (10) and pulp density (25 %) at room temperature. As for sodium cyanide at the same concentration (0.2 M), it was found that the extraction was (49.47 %) at time (6) hours, pH (10), and pulp density (25 %). At room temperature, it was clear that cyanide was less efficient at (0.2 M) concentration than thiosulfate in dissolving silver.http://www.sciencedirect.com/science/article/pii/S2211715623000681Thiosulfate leachingCyanide leachingSilver sulfideRoastingSulfide minerals |
| spellingShingle | AL motasim Tambal Abdalla Suliman Abdelmajid Ibrahim Essam Mohamed Mohammed Kabashi Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore Results in Chemistry Thiosulfate leaching Cyanide leaching Silver sulfide Roasting Sulfide minerals |
| title | Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore |
| title_full | Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore |
| title_fullStr | Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore |
| title_full_unstemmed | Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore |
| title_short | Study of the effects of roasting and sodium thiosulfate on the extraction of silver from Volcanic Massive Sulfide ore |
| title_sort | study of the effects of roasting and sodium thiosulfate on the extraction of silver from volcanic massive sulfide ore |
| topic | Thiosulfate leaching Cyanide leaching Silver sulfide Roasting Sulfide minerals |
| url | http://www.sciencedirect.com/science/article/pii/S2211715623000681 |
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