Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution
Leaching of molybdenite concentrate with hydrogen peroxide in sulfuric acid solution was investigated to determine the effects of reaction time, reaction temperature, H2O2 concentration, H2SO4 concentration, pulp density and rotation speed on molybdenum extraction and molybdenite dissolution kinetic...
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| Format: | Article |
| Language: | English |
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Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
2014-06-01
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| Series: | Iranian Journal of Chemistry & Chemical Engineering |
| Subjects: | |
| Online Access: | http://www.ijcce.ac.ir/article_10769_2ac8d59fb45aa906a4f3ae439905acdb.pdf |
| _version_ | 1818540706034089984 |
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| author | Mehdi Moazemi Goodarzi Bahram Rezai Anahita Seifikhani |
| author_facet | Mehdi Moazemi Goodarzi Bahram Rezai Anahita Seifikhani |
| author_sort | Mehdi Moazemi Goodarzi |
| collection | DOAJ |
| description | Leaching of molybdenite concentrate with hydrogen peroxide in sulfuric acid solution was investigated to determine the effects of reaction time, reaction temperature, H2O2 concentration, H2SO4 concentration, pulp density and rotation speed on molybdenum extraction and molybdenite dissolution kinetics, using the Taguchi method. From analysis of variance (ANOVA) for molybdenum extraction, the most significant factors were H2O2 concentration, pulp density and reaction temperature. The optimal factor levels to maximize extraction were determined. As the leaching process does not result in an ash layer, only chemically controlled kinetic model was applied. ANOVA for the reaction rate constant showed that H2O2 concentration made the greatest contribution to the model, and reaction time and temperature were also statistically significant factors. The reaction rate constant increased with increasing temperature and H2O2 concentration. The order of reaction with respect to H2O2 and activation energy for the dissolution were determined to be 1.21 and 46.5 kJ/mol, respectively, and a semi-empirical rate equation was derived. |
| first_indexed | 2024-12-11T21:58:53Z |
| format | Article |
| id | doaj.art-108916782d57486cb0e8f8bb7f911775 |
| institution | Directory Open Access Journal |
| issn | 1021-9986 1021-9986 |
| language | English |
| last_indexed | 2024-12-11T21:58:53Z |
| publishDate | 2014-06-01 |
| publisher | Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR |
| record_format | Article |
| series | Iranian Journal of Chemistry & Chemical Engineering |
| spelling | doaj.art-108916782d57486cb0e8f8bb7f9117752022-12-22T00:49:11ZengIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry & Chemical Engineering1021-99861021-99862014-06-01332738510769Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid SolutionMehdi Moazemi Goodarzi0Bahram Rezai1Anahita Seifikhani2Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413 Tehran, I.R. IRANDepartment of Mining and Metallurgical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413 Tehran, I.R. IRANDepartment of Mining and Metallurgical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413 Tehran, I.R. IRANLeaching of molybdenite concentrate with hydrogen peroxide in sulfuric acid solution was investigated to determine the effects of reaction time, reaction temperature, H2O2 concentration, H2SO4 concentration, pulp density and rotation speed on molybdenum extraction and molybdenite dissolution kinetics, using the Taguchi method. From analysis of variance (ANOVA) for molybdenum extraction, the most significant factors were H2O2 concentration, pulp density and reaction temperature. The optimal factor levels to maximize extraction were determined. As the leaching process does not result in an ash layer, only chemically controlled kinetic model was applied. ANOVA for the reaction rate constant showed that H2O2 concentration made the greatest contribution to the model, and reaction time and temperature were also statistically significant factors. The reaction rate constant increased with increasing temperature and H2O2 concentration. The order of reaction with respect to H2O2 and activation energy for the dissolution were determined to be 1.21 and 46.5 kJ/mol, respectively, and a semi-empirical rate equation was derived.http://www.ijcce.ac.ir/article_10769_2ac8d59fb45aa906a4f3ae439905acdb.pdfmolybdeniteleachingkineticshydrogen peroxidetaguchi |
| spellingShingle | Mehdi Moazemi Goodarzi Bahram Rezai Anahita Seifikhani Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution Iranian Journal of Chemistry & Chemical Engineering molybdenite leaching kinetics hydrogen peroxide taguchi |
| title | Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution |
| title_full | Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution |
| title_fullStr | Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution |
| title_full_unstemmed | Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution |
| title_short | Leaching and Kinetic Modelling of Molybdenite Concentrate Using Hydrogen Peroxide in Sulfuric Acid Solution |
| title_sort | leaching and kinetic modelling of molybdenite concentrate using hydrogen peroxide in sulfuric acid solution |
| topic | molybdenite leaching kinetics hydrogen peroxide taguchi |
| url | http://www.ijcce.ac.ir/article_10769_2ac8d59fb45aa906a4f3ae439905acdb.pdf |
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