Research on Increase of Iron Recovery during Smelting & Reduction of Metallized Pellet of Vanadium-bearing Titaniferous Magnetite

Production of vanadium-rich pig iron by smelting and reduction of metallized pellets is one of the ways to utilize vanadium-bearing titaniferous magnetite.There is a positive correlation between vanadium and iron recovery rates.In order to improve iron recovery,orthogonal experiments were conducted to investigate the effects of melting and reduction temperature,slag basicity,fluorite proportioning and reduction time on the iron recovery rate.After that,single-factor tests were carried out to optimize process condition for reduction.The results show that among those factors most influencing the recovery rate,the basicity and reduction time ranks first;the temperature comes second and fluorite proportioning exerts the least influence.As the temperature is at 1 530℃,basicity at 0.8,fluorite proportioning at 2%,and reduction time for 40 min,the optimal process condition for iron recovery is obtained.Under this condition,iron and vanadium recovery rates can reach 95.39% and 92.49% respectively,and the separation of slag and iron is good.