Recovery of Fe, V, and Ti in modified Ti-bearing blast furnace slag

A two-stage oxidation-alkali leaching-acid leaching method was proposed to recovery Fe, V, and Ti in modified Ti-bearing blast furnace slag. The optimal experiment conditions of iron extraction were one-stage oxidation time 40 s and holding time 8 min. The recovery rate of iron was 89.93%. The optimum experiment conditions of vanadium extraction were total oxidation time of 126 s, NaOH concentration of 4.0 mol/L, leaching temperature of 95 degrees C, leaching time of 90 min, and the number of cycle was 4. The leaching rate of vanadium was 92.13%. The optimal experiment conditions of titanium extraction were HCl concentration of 4.5 mol/L, leaching temperature of 75 degrees C, and leaching time of 90 min. The TiO2 content of synthetic rutile was 98.61%.

Automated summary

A two-stage oxidation-alkali leaching-acid leaching method was proposed for the recovery of Fe, V, and Ti in modified Ti-bearing blast furnace slag. The experimental results showed that this method can efficiently recover these metals with high extraction rates under appropriate operational conditions.