Equilibrium between Slag and Molten Iron in the Direct Alloying of Steel with Nb<sub>2</sub>O<sub>5</sub>-Bearing Slag

Chen Weiqing; Zhou Rongzhang; Lin Zongcai

doi:10.13374/j.issn1001-053x.1989.06.023

Chen Weiqing, Zhou Rongzhang, Lin Zongcai. Equilibrium between Slag and Molten Iron in the Direct Alloying of Steel with Nb2O5-Bearing Slag[J]. Chinese Journal of Engineering, 1989, 11(6): 526-532. DOI: 10.13374/j.issn1001-053x.1989.06.023

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Equilibrium between Slag and Molten Iron in the Direct Alloying of Steel with Nb₂O₅-Bearing Slag

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Equilibrium between slag and molten iron at 1600℃ was investigated for the direct alloying of steel with Nb₂O₆-bearing slag. The activity of niobium oxide in the slag was measured. The α_Nb₂O₅ is in the range of 10^-2-10^-4. Theδ_Nb₂O₅ is ranged in 10⁰-10^-2.Niobium partition decreases with the increase ofSi% and CaO/SiO₂. When α₀ and ΣFeO decrease, niobium partition decreases too. The δ_Nb₂o₅ and the ratio of γ_siO₂ to γ_Nb₂O₅ decrease with the incre-ase of slag basicity. The suitable thermodynamic conditions in direct alloying of steel with Nb2O5-bearing slag have been found.

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Equilibrium between Slag and Molten Iron in the Direct Alloying of Steel with Nb2O5-Bearing Slag

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Equilibrium between Slag and Molten Iron in the Direct Alloying of Steel with Nb₂O₅-Bearing Slag