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Optimization on Temperature Strategy of BOF Vanadium Extraction to Enhance Vanadium Yield with Minimum Carbon Loss
oleh: Zhen-Yu Zhou, Ping Tang
Format: | Article |
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Diterbitkan: | MDPI AG 2021-06-01 |
Deskripsi
During the vanadium extraction process in basic oxygen furnace (BOF), unduly high temperature is unfavorable to achieve efficient vanadium yield with minimum carbon loss. A new temperature strategy was developed based on industrial experiments. The new strategy applies the selective oxidation temperature between carbon and vanadium (<i>T</i><sub>sl</sub>) and the equilibrium temperature of vanadium oxidation and reduction (<i>T</i><sub>eq</sub>) for the earlier and middle-late smelting, respectively. Industrial experiments showed 56.9 wt% of V was removed together with carbon loss for 5.6 wt% only in the earlier smelting. Additionally, 30 wt% of vanadium was removed together with carbon loss by 13.4 wt% in middle-late smelting. Applicability analyses confirmed <i>T</i><sub>eq</sub> as the high-limit temperature, vanadium removal remains low and carbon loss increased sharply when the molten bath temperature exceeded <i>T</i><sub>eq</sub>. With the optimized temperature strategy, vanadium removal increased from 69.2 wt% to 92.3 wt% with a promotion by 23 wt%.