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<p>The abundant vanadium titanomagnetite (VTM) resource from the Panxi region of China is more refractory for sintering due to its much higher TiO<sub>2</sub> content and lower SiO<sub>2</sub> content. Action mechanism of binary basicity on this VTM sintering is still unclear. In this paper, the sintering characteristics of this VTM were investigated at different binary basicities via mini-sintering tests, and the results indicate that increasing binary basicity from 1.8 to 2.6 improves the formation ability and fluidity of the liquid phase. The microstructure of the sinter briquettes becomes increasingly dense, contributing to higher strength. The amount of silico-ferrite of calcium and aluminum (SFCA) with dendritic and acicular textures is greatly increased from 35.03&#xa0;area% to 60.95&#xa0;area% as the binary basicity rises from 1.8 to 2.2. However, the over-high binary basicity leads to the gradual formation of calcium silicate phases while the formation of SFCA is inhibited. In addition, SFCA mainly exhibits a large-sized lamellar texture. The appropriate binary basicity for the VTM sintering should be 2.2 for both better strength and reduction characteristics of the sinter briquettes.</p>

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Action Mechanism of Binary Basicity on Mineralization Characteristics of High-TiO2 and Low-SiO2 Vanadium Titanomagnetite Sintering

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • Peng Hu,
  • Junjie Zeng,
  • Yuxiao Xue,
  • Rui Wang,
  • Yang You,
  • Mingrui Yang,
  • Xuewei Lv

摘要

The abundant vanadium titanomagnetite (VTM) resource from the Panxi region of China is more refractory for sintering due to its much higher TiO2 content and lower SiO2 content. Action mechanism of binary basicity on this VTM sintering is still unclear. In this paper, the sintering characteristics of this VTM were investigated at different binary basicities via mini-sintering tests, and the results indicate that increasing binary basicity from 1.8 to 2.6 improves the formation ability and fluidity of the liquid phase. The microstructure of the sinter briquettes becomes increasingly dense, contributing to higher strength. The amount of silico-ferrite of calcium and aluminum (SFCA) with dendritic and acicular textures is greatly increased from 35.03 area% to 60.95 area% as the binary basicity rises from 1.8 to 2.2. However, the over-high binary basicity leads to the gradual formation of calcium silicate phases while the formation of SFCA is inhibited. In addition, SFCA mainly exhibits a large-sized lamellar texture. The appropriate binary basicity for the VTM sintering should be 2.2 for both better strength and reduction characteristics of the sinter briquettes.