A novel method of pellet calcification roasting-H₂SO₄ leaching was proposed to efficiently separate and extract vanadium (V) from vanadium-titanium (V-Ti) magnetite concentrates. The leaching rate of V is as high as 88.98%, while the leaching rate of impurity iron is only 1.79%. Moreover, the leached pellets can be used as raw materials for blast furnace ironmaking after secondary roasting. X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) analyses showed that V³⁺ was oxidized to V⁵⁺ after roasting at 1200 °C, and V⁵⁺ was then leached by H₂SO₄. X-ray diffraction (XRD) analyses and single factor experiment revealed a minimal amount of dissolved Fe₂O₃ during H₂SO₄ leaching. Therefore, a high separation degree of V and iron (Fe) from V-Ti magnetite concentrate was achieved through H₂SO₄ leaching. Compared with the traditional roasting-leaching process, this process can achieve a high selectivity of V and Fe, and has excellent prospects for industrial production.

提出了一种新的颗粒钙化焙烧-H ₂ SO ₄浸出的新方法，以从钒-钛（V-Ti）磁铁矿精矿中有效分离和提取钒（V）。V的浸出率高达88.98％，而杂质铁的浸出率仅为1.79％。此外，浸出的颗粒可以用作二次焙烧后的高炉炼铁的原料。X射线光电子能谱（XPS）和能量色散X射线能谱（SEM-EDS）的扫描电子显微镜分析表明，在1200°C焙烧后，V ³⁺被氧化为V ⁵⁺，然后浸出V ⁵⁺通过H ₂ SO ₄。X射线衍射（XRD）分析和单因素实验表明，在H ₂ SO ₄浸出过程中，溶解的Fe ₂ O ₃量最少。因此，通过H ₂ SO ₄浸出实现了V-Ti磁铁矿精矿中V和铁（Fe）的高分离度。与传统的焙烧浸出工艺相比，该工艺可以实现对钒和铁的高选择性，具有很好的工业化生产前景。