Investigation on removal of Nb from Nb-bearing hot metal with CO2

Metalurgija

Z. W. Zhao¹  J. N. Huang¹  B. W. Li¹  Z. Y. Xu² 

[1] Inner Mongolia University of Science and Technology, China;School of Materials Science and Engineering, Inner Mongolia University of Technology, China;

关键词: hot metal;    removal of Nb;    bottom-CO₂;    time;    temperature;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper focuses on removal niobium from Nb-bearing hot metal by bottom blown-CO₂gas 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 CO₂flow 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. %.

【 授权许可】

Unknown