Stabilizing the toxic element chromium and improving vanadium recovery are crucial for the economic and efficient treatment of high chromium-bearing vanadium slag. This study employed mechanical activation to enhance vanadium extraction from high chromium-bearing vanadium slag through a low-sodium salt roasting-water leaching process. The effects of Na₂CO₃ addition, roasting temperature, and roasting time were investigated to determine the optimal roasting parameters. Subsequently, the effects of mechanical activation on the morphological and microstructural changes were characterized using a laser diffraction particle size analyzer, a micropore physisorption analyzer, scanning electron microscopy, energy dispersive spectrometry, and X-ray diffraction. The effects of mechanical activation on the extraction of vanadium and chromium were determined by leaching the roasted samples after varying activation times. The results indicated that mechanical activation decreased particle size, increased surface area, and enhanced the activity of the samples. The leaching results demonstrated that mechanical activation enhanced the leaching efficiency of vanadium by 5 %, reduced the optimum roasting temperature by 50 ℃, and slightly increased the leaching efficiency of chromium by 0.5–1 %.

稳定有毒元素铬并提高钒回收率对于经济高效地处理高铬钒渣至关重要。本研究采用机械活化，通过低钠盐焙烧水浸工艺，提高高铬钒渣中钒的提取率。_{研究了Na 2} CO ₃添加量、焙烧温度和焙烧时间的影响，以确定最佳焙烧参数。随后，使用激光衍射粒度分析仪、微孔物理吸附分析仪、扫描电子显微镜、能量色散光谱法和 X 射线衍射来表征机械活化对形态和微观结构变化的影响。通过在不同活化时间后浸出焙烧样品来确定机械活化对钒和铬提取的影响。结果表明，机械活化降低了颗粒尺寸，增加了表面积，并增强了样品的活性。浸出结果表明，机械活化使钒的浸出率提高了5%，最佳焙烧温度降低了50℃，铬的浸出率略有提高0.5%~1%。