Zheng-de Pang, Yu-yang Jiang, Jia-wei Ling, Xue-wei Lv, and Zhi-ming Yan, Blast furnace ironmaking process with super high TiO2 in the slag: Density and surface tension of the slag, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2262-x
Cite this article as:
Zheng-de Pang, Yu-yang Jiang, Jia-wei Ling, Xue-wei Lv, and Zhi-ming Yan, Blast furnace ironmaking process with super high TiO2 in the slag: Density and surface tension of the slag, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2262-x
Research Article

Blast furnace ironmaking process with super high TiO2 in the slag: Density and surface tension of the slag

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  • Received: 22 November 2020Revised: 24 January 2021Accepted: 26 January 2021Available online: 2 February 2021
  • Considering high novelty and potential on ultra–high (>80%) or full V–Ti–Magnetite ore under blast furnace smelting, we are conducting a series of works on physics character of high TiO2 bearing blast furnace slag (BFS) for slag optimization. This work discussed the density and surface tension of high TiO2 bearing BFS using the Archimedean principle and the maximum bubble pressure method, respectively. The influence of TiO2 content and MgO/CaO (mass ratio) on the density and surface tension of CaO–SiO2–TiO2–MgO–Al2O3 slags were investigated. Results indicated that the density of slags decreased as increasing TiO2 content from 20 to 30 wt%, but it increased slightly as increasing MgO/CaO from 0.32 to 0.73. In view of silicate network structure, the density and the degree of polymerization (DOP) of network structure have a consistent trend. The addition of TiO2 reduces (Q3)2/(Q2) ratio, decreases DOP, which leads to the decrease of slag density. The surface tension of CaO–SiO2–TiO2–MgO–Al2O3 slags decreased dramatically as increasing TiO2 content from 20 to 30 wt%. Conversely, it increased as increasing MgO/CaO from 0.32 to 0.73. Furthermore, the iso–surface tension lines were obtained under 1723K using the Tanaka developed model in view of Butler formula. It may be useful for slag optimization of ultra–high proportion (>80%) or even full V–Ti–Magnetite ore under BF smelting.
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