The study focused on the recovery of vanadium from a Korean vanadium-bearing titaniferous magnetite (VTM) ore, examining the behaviors of magnetic separation and Na₂CO₃ roasting-water leaching. Two concentrates were prepared using single-stage dry magnetic separation and three-step wet magnetic separation, resulting in V₂O₅ grades of 0.8% and 1.0% and major gangue mineral SiO₂ contents of 6.5% and 1.7%, respectively. These concentrates were subsequently roasted at 1050 °C with the addition of Na₂CO₃ and then water-leached at 25 °C. Various stoichiometric ratios of V₂O₅ to Na₂CO₃ were tested, ranging from 1:1 to 1:40 of the theoretically required amount. As the amount of Na₂CO₃ increased, the vanadium leaching efficiency showed fluctuations between 4 and 35% for ratios of 1:1 to 1:10, while it linearly increased from 4 to 82% for ratios of 1:10 to 1:40 in the leaching of the low-grade concentrate. In contrast, the leaching efficiency increased from 47 to 74% for ratios of 1:1 to 1:8 and then sharply rose to 84% at a ratio of 1:10 in the leaching of the high-grade concentrate. Subsequently, it reached a plateau of 92 to 94% for ratios of 1:20 to 1:40. The difference in leaching efficiency was primarily due to the reaction of gangue minerals with Na₂CO₃, which hindered vanadium leaching from the VTM concentrates. This hindrance was notably more pronounced in the low-grade concentrate with the lower salt ratio, as the gangue minerals exhibited a preference for consuming Na₂CO₃ over vanadium. The mineral formation was analyzed in detail using XRD and MLA to shed light on the mechanism of different vanadium leaching behavior depending on the concentrate grade and vanadium to salt ratio. Based on the results of this study, it is evident that applying a proper magnetic separation procedure is significant to achieving satisfactory vanadium recovery with less salt amount by removing gangue minerals ahead.

该研究的重点是从韩国含钒钛磁铁矿 (VTM) 矿石中回收钒，研究了磁选和 Na ₂ CO ₃焙烧水浸的行为。采用单级干式磁选和三级湿式磁选制备了两种精矿，其V ₂ O ₅品位分别为0.8%和1.0%，主要脉石矿物SiO ₂含量分别为6.5%和1.7%。随后将这些浓缩物在添加Na ₂ CO ₃的情况下在1050 °C 下焙烧，然后在25 °C 下进行水浸出。_{测试了V 2} O ₅与Na ₂ CO ₃的各种化学计量比，范围为理论所需量的1:1至1:40。_{随着Na 2} CO ₃用量的增加，1:1~1:10时，钒浸出率在4%~35%之间波动；1:10~1:10时，钒浸出率从4%~82%线性增加。 40在低品位精矿的浸出中。相比之下，在高品位精矿的浸出中，浸出率在1:1至1:8的比例下从47%提高到74%，然后在1:10的比例下急剧上升至84%。随后，在 1:20 至 1:40 的比例下，该比例达到了 92% 至 94% 的稳定水平。浸出效率的差异主要是由于脉石矿物与Na ₂ CO ₃的反应，这阻碍了VTM精矿中钒的浸出。这种阻碍在盐比较低的低品位精矿中尤其明显，因为脉石矿物比钒更倾向于消耗Na ₂ CO ₃。使用 XRD 和 MLA 详细分析了矿物形成，以揭示根据精矿品位和钒盐比不同的钒浸出行为的机制。根据这项研究的结果，很明显，应用适当的磁选程序对于通过提前去除脉石矿物以较少的盐量实现令人满意的钒回收率具有重要意义。