Metallurgy, Vol. 57 No. 4, 2018.
Original scientific paper
Investigation on removal of Nb from Nb-bearing hot metal with CO2
Z. Y. Xu
orcid.org/0000-0002-3755-3384
; School of Materials Science and Engineering, Inner Mongolia University of Technology, China
J. N. Huang
; Inner Mongolia University of Science and Technology, China
B. W. Li
; Inner Mongolia University of Science and Technology, China
Z. W. Zhao
; Inner Mongolia University of Science and Technology, China
Abstract
This paper focuses on removal niobium from Nb-bearing hot metal by bottom blown-CO2 gas at flow rate of 1,0×103 Nm3/h, 1,5×10-3 Nm3/h at 1350 °C and 1 450 °C in a medium induction furnace. The results show that Nb and P are oxidized and the ratio of Nb to P in Nb-bearing slag at blowing termination reaches to 46,66 at 1350 °C and CO2 flow rate of 1,5m3/h, which is more than that in the other condition; it improves to remove more Nb from hot metal with bottom-blown CO2 at 1 350 °C than at 1450 °C; Nb starts to oxidize by CO2 to form slag when Si content in molten iron decreases to low 0,1 wt. %.
Keywords
hot metal; removal of Nb; bottom-CO<sub>2</sub>; time; temperature
Hrčak ID:
201731
URI
Publication date:
1.10.2018.
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