The
melting and separation behavior of vanadium−titanium magnetite pellets directed
at an efficient extraction of vanadium and
titanium was systematically investigated. Applying FactSage simulations and
experiments, the smelting separation of three pre-reduced pellets from
different regions was analyzed. The simulations demonstrate that FeTi2O5 is converted to TiC at low temperatures, necessitating suppression of this
step. Experiments under optimized conditions (1590−1690 °C,
20−25 min, 2% coke, basicity 0.4−0.6, and 3.0%−6.0% MgO) yield iron grade
of 92.35%− 95.06%, titanium grade of 34.37%−39.89%, and vanadium grade of
0.56%−1.52%, with recoveries of 99.52%−99.60%, 94.08%−98.96%, and 92.63%−94.38%
for iron, titanium and vanadium, respectively. The titanium in the slag,
primarily in the form of anosovite, is suitable for sulfuric acid-based
titanium white production. An increase in basicity, MgO content, and pellet
metallization serves to improve vanadium recovery in melted iron but lowers the
titanium grade in the slag. The overall process effectively utilizes vanadium
and titanium resources under optimized conditions.
Zheng-qi GUO, Xing CHEN, Yue SHI, De-qing ZHU, Jian PAN, Cong-cong YANG, Si-wei LI, Ji-wei XU, Xin WANG
. Smelting separation
behaviors of various reduced vanadium titanomagnetite pellets[J]. Transactions of Nonferrous Metals Society of China, 2025
, 35(11)
: 3869
-3885
.
DOI: 10.1016/S1003-6326(25)66918-4