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-CO₂; time; temperature

Hrčak ID:

201731

URI

https://hrcak.srce.hr/201731

Publication date:

1.10.2018.

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