Scholarlink

<p>Vanadium-titanium magnetite (VTM) is a polymetallic mineral resource containing Fe, V, and Ti, which has rich application prospects and great economic value. In modern ferrous metallurgy procedures, the blast furnace method with a burden composition of high-basicity sinter, acid pellets, and lump ore is still used for VTM smelting. Due to the excellent performance of pellets in terms of energy consumption and emissions, high-percentage pellets and all pellet smelting technology are in line with the development direction of the steel industry in the context of “carbon peak and neutrality”. The results showed that when the basicity of VTM pellets increased from 0.08 to 1.3, the softening interval (ΔT<sub>1</sub>) decreased from 114&#xa0;°C to 97&#xa0;°C, the melting interval (ΔT<sub>2</sub>) decreased from 180&#xa0;°C to 173&#xa0;°C and then increased to 194&#xa0;°C, and the permeability index (S) increased from 831.44 kPa&#xa0;°C to 2034.68 kPa&#xa0;°C. As the basicity increased, the softening and air permeability properties gradually deteriorated, and the melting properties first improved and then deteriorated, and finally the softening-melting properties were optimal at a basicity of 0.5. When the H<sub>2</sub> content increased from 0 to 15pct, ΔT<sub>1</sub> increased from 113&#xa0;°C to 145&#xa0;°C, ΔT<sub>2</sub> decreased from 173&#xa0;°C to 141&#xa0;°C, and the S-value increased from 885.62 kPa&#xa0;°C to 914.34 kPa&#xa0;°C and then decreased to 585.56 kPa&#xa0;°C. As the H<sub>2</sub> content increased, the softening zone of the VTM pellets became wider, while the melting zone stuck narrower and the air permeability of the burden increased. Therefore, replacing CO with H<sub>2</sub> improved the softening-melting performance of VTM pellets.</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

Effect of Basicity and Hydrogen-Rich Atmosphere on the Softening-Melting Behavior of Vanadium-Titanium Magnetite Pellets

  • 期刊论文

  • 发表日期：

    2025年9月24日

查看全文
  • Song Zhang,
  • Yun Huang,
  • Xiangyou Gui,
  • Jianfeng Chen,
  • Shufang Lu,
  • Yanbing Zong,
  • Shushi Zhang,
  • Zhenyang Wang,
  • Jianliang Zhang

摘要

Vanadium-titanium magnetite (VTM) is a polymetallic mineral resource containing Fe, V, and Ti, which has rich application prospects and great economic value. In modern ferrous metallurgy procedures, the blast furnace method with a burden composition of high-basicity sinter, acid pellets, and lump ore is still used for VTM smelting. Due to the excellent performance of pellets in terms of energy consumption and emissions, high-percentage pellets and all pellet smelting technology are in line with the development direction of the steel industry in the context of “carbon peak and neutrality”. The results showed that when the basicity of VTM pellets increased from 0.08 to 1.3, the softening interval (ΔT1) decreased from 114 °C to 97 °C, the melting interval (ΔT2) decreased from 180 °C to 173 °C and then increased to 194 °C, and the permeability index (S) increased from 831.44 kPa °C to 2034.68 kPa °C. As the basicity increased, the softening and air permeability properties gradually deteriorated, and the melting properties first improved and then deteriorated, and finally the softening-melting properties were optimal at a basicity of 0.5. When the H2 content increased from 0 to 15pct, ΔT1 increased from 113 °C to 145 °C, ΔT2 decreased from 173 °C to 141 °C, and the S-value increased from 885.62 kPa °C to 914.34 kPa °C and then decreased to 585.56 kPa °C. As the H2 content increased, the softening zone of the VTM pellets became wider, while the melting zone stuck narrower and the air permeability of the burden increased. Therefore, replacing CO with H2 improved the softening-melting performance of VTM pellets.