Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance
The synchronous oxidation-volatilization process of molybdenum concentrate pellets addresses several key challenges in traditional pyrometallurgy, such as low volatilization rates due to sintering and reduced product purity caused by severe dust pollution during direct ore powder smelting. Efficient...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425015066 |
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| author | Yanrui Hou Ruoyu Yang Jun Luo Hu Sun Guanghui Li Tao Jiang |
| author_facet | Yanrui Hou Ruoyu Yang Jun Luo Hu Sun Guanghui Li Tao Jiang |
| author_sort | Yanrui Hou |
| collection | DOAJ |
| description | The synchronous oxidation-volatilization process of molybdenum concentrate pellets addresses several key challenges in traditional pyrometallurgy, such as low volatilization rates due to sintering and reduced product purity caused by severe dust pollution during direct ore powder smelting. Efficient pelletization of molybdenum concentrate is essential for advancing its industrial application. However, molybdenite-a typical sulfide mineral-exhibits strong hydrophobicity, which significantly hinders pellet formation and fails to meet industrial standards. To overcome this, the present study introduces kaolin into the pelletization system as a natural binder with excellent hydrophilicity, effectively improving the surface wettability of molybdenite and enabling the development of a high-efficiency composite pelletization technology. The optimized pellets demonstrate excellent physical properties, including a compressive strength of 18.12 N, an abrasion index of 0.34, and a porosity of 25.52 %, along with good structural integrity and gas permeability required for oxidative roasting. Under industrially relevant conditions, the pellets exhibit outstanding roasting performance, achieving a high molybdenum volatilization rate of 91.61 %. Post-roasting, high-purity MoO3 crystals (99.99 %) are obtained without the need for secondary purification, confirming the process's effectiveness in impurity control and stable production of high-quality products. |
| format | Article |
| id | doaj-art-e635e8b86f474879aa6c851d190e1e52 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-e635e8b86f474879aa6c851d190e1e522025-08-20T02:07:46ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01371233124210.1016/j.jmrt.2025.06.084Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performanceYanrui Hou0Ruoyu Yang1Jun Luo2Hu Sun3Guanghui Li4Tao Jiang5School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, ChinaCollege of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, Hunan, China; Corresponding author. Peace Building, RM 241, No. 932 South Lushan Road, Changsha, Hunan, 410083, China.School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, Hunan, ChinaThe synchronous oxidation-volatilization process of molybdenum concentrate pellets addresses several key challenges in traditional pyrometallurgy, such as low volatilization rates due to sintering and reduced product purity caused by severe dust pollution during direct ore powder smelting. Efficient pelletization of molybdenum concentrate is essential for advancing its industrial application. However, molybdenite-a typical sulfide mineral-exhibits strong hydrophobicity, which significantly hinders pellet formation and fails to meet industrial standards. To overcome this, the present study introduces kaolin into the pelletization system as a natural binder with excellent hydrophilicity, effectively improving the surface wettability of molybdenite and enabling the development of a high-efficiency composite pelletization technology. The optimized pellets demonstrate excellent physical properties, including a compressive strength of 18.12 N, an abrasion index of 0.34, and a porosity of 25.52 %, along with good structural integrity and gas permeability required for oxidative roasting. Under industrially relevant conditions, the pellets exhibit outstanding roasting performance, achieving a high molybdenum volatilization rate of 91.61 %. Post-roasting, high-purity MoO3 crystals (99.99 %) are obtained without the need for secondary purification, confirming the process's effectiveness in impurity control and stable production of high-quality products.http://www.sciencedirect.com/science/article/pii/S2238785425015066Molybdenum concentrateKaolinPelletizationOxidative roastingHigh purity MoO3 |
| spellingShingle | Yanrui Hou Ruoyu Yang Jun Luo Hu Sun Guanghui Li Tao Jiang Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance Journal of Materials Research and Technology Molybdenum concentrate Kaolin Pelletization Oxidative roasting High purity MoO3 |
| title | Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance |
| title_full | Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance |
| title_fullStr | Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance |
| title_full_unstemmed | Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance |
| title_short | Preparation of high-purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets: Optimization of pelletization performance |
| title_sort | preparation of high purity molybdenum oxide by oxidative roasting of molybdenum concentrate pellets optimization of pelletization performance |
| topic | Molybdenum concentrate Kaolin Pelletization Oxidative roasting High purity MoO3 |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425015066 |
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