Structural and Liberation Effect of Vanadium Titano-Magnetite by Microwave Pretreatment.
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| Title: | Structural and Liberation Effect of Vanadium Titano-Magnetite by Microwave Pretreatment. |
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| Authors: | Wang, Junpeng1 (AUTHOR) junp_wang@yeah.net, Liu, Bo1 (AUTHOR), Zhang, Yuyuan1 (AUTHOR), Jiang, Tao2 (AUTHOR) |
| Source: | JOM: The Journal of The Minerals, Metals & Materials Society (TMS). Jul2025, Vol. 77 Issue 7, p5283-5292. 10p. |
| Subjects: | Microwave heating, Microhardness testing, Crystal grain boundaries, Mineral analysis, Scanning electron microscopy |
| Abstract: | This study explored the impact of microwave pretreatment on the structural and liberation characteristics of vanadium titano-magnetite (VTM). Various methods such as x-ray diffraction, scanning electron microscopy, micro-hardness testing, particle size analysis, and mineral liberation analysis were utilized. Results indicated that microwave treatment improved the crystallization of titanomagnetite and ilmenite and generated numerous micro-cracks on the ore surface because of the selective heating by microwaves and differential expansion among minerals. This treatment also reduced the micro-hardness, particularly at grain boundaries, with a notable decrease of 78.09% at the grain boundary when treated at 4 kW for 150 s followed by water quenching. Additionally, the liberation degree of the grinding products from microwave-treated ore was superior to that of untreated ore, with increases of 4.92% for titanomagnetite and 8.13% for ilmenite when the grinding products with a particle size of − 0.075 mm accounted for 35%. These findings suggest that microwave pretreatment enhances the selective grinding effect and promotes detachment dissociation of grinding products. [ABSTRACT FROM AUTHOR] |
| Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Abstract: | This study explored the impact of microwave pretreatment on the structural and liberation characteristics of vanadium titano-magnetite (VTM). Various methods such as x-ray diffraction, scanning electron microscopy, micro-hardness testing, particle size analysis, and mineral liberation analysis were utilized. Results indicated that microwave treatment improved the crystallization of titanomagnetite and ilmenite and generated numerous micro-cracks on the ore surface because of the selective heating by microwaves and differential expansion among minerals. This treatment also reduced the micro-hardness, particularly at grain boundaries, with a notable decrease of 78.09% at the grain boundary when treated at 4 kW for 150 s followed by water quenching. Additionally, the liberation degree of the grinding products from microwave-treated ore was superior to that of untreated ore, with increases of 4.92% for titanomagnetite and 8.13% for ilmenite when the grinding products with a particle size of − 0.075 mm accounted for 35%. These findings suggest that microwave pretreatment enhances the selective grinding effect and promotes detachment dissociation of grinding products. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10474838 |
| DOI: | 10.1007/s11837-025-07143-2 |
