Selective Leaching of Vanadium from Calcification-Roasted Pellets of Vanadium–Titanium–Iron Concentrate by a Cyclic Two-Stage Sulfuric Acid Process

Here, a process for leaching vanadium from calcified roasting pellets (CPVC) of vanadium–titanium-iron concentrate by two-stage sulfuric acid cycle was proposed. The first stage mainly the removal silicon pellet and solution. After second stage, total rates iron were 75.52% 0.71%, respectively. concentration in solution reached 6.80 g/L, which can subsequently direct precipitation without extraction enrichment. roasting, crushing strength 2250 N, met requirement blast furnace making. Eh-pH diagrams V-Fe-H2O system at different temperatures plotted. Thermodynamically, it difficult to selectively leach changing conventional conditions. In addition, before after analyzed. grade increased slightly leaching, main phases remained as Fe2O3 Fe9TiO15. S entered leached during reaction removed pellets.