Scholarlink

<p>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&#xa0;kW for 150&#xa0;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&#xa0;mm accounted for 35%. These findings suggest that microwave pretreatment enhances the selective grinding effect and promotes detachment dissociation of grinding products.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural and Liberation Effect of Vanadium Titano-Magnetite by Microwave Pretreatment

  • 期刊论文

  • 发表日期：

    2025年2月3日

查看全文
  • Junpeng Wang,
  • Bo Liu,
  • Yuyuan Zhang,
  • Tao Jiang

摘要

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.