The effect of mechanical activation on extraction of vanadium from chromium-containing vanadate solution by precipitation with calcium salt and leaching with sodium carbonate salt was investigated. The whole process including selective precipitation of vanadium, alkali leaching of vanadium and cyclic utilization of calcium. Compared with stirring, ball milling is more effective for vanadium precipitation under the same experiment conditions. This is because the calcium vanadate formed on the surface of Ca(OH)₂ can be peeled off by mechanical activation, which can also be confirmed by SEM image, EDS spectra and XRD patterns of the precipitation. The effect of temperature ranging from 20 °C to 50 °C on vanadium leaching efficiency was studied with the other reaction conditions fixed as stirring speed of 400 r/min, NaHCO₃/V molar ratio of 2.80, L/S ratio of 4:1 ml/g. It is observed that vanadium leaching efficiency exceeding 99% was obtained after only 6 min of reaction as well as leaching temperature had little influence on vanadium leaching efficiency. After filtration, the leach solution was used to prepare crystals of NH₄VO₃ and the leach residue was calcined to obtain CaO. The precipitation efficiency of V was 99.34% by adding CaO into chromium-containing vanadate solution according to Ca/V molar ratio 1.80 and ball milling for 90 min with 140 rpm at room temperature. Mechanical activation can not only increase the vanadium precipitation efficiency and improve the leaching performance of the precipitate, but also to realize the cyclic utilization of calcium salt and crystallization solution.

研究了机械活化对钙盐沉淀和碳酸钠盐浸出从含铬钒酸盐溶液中提取钒的影响。整个过程包括钒的选择性沉淀，钒的碱浸和钙的循环利用。与搅拌相比，球磨在相同的实验条件下对钒的沉淀更有效。这是因为钒酸钙形成在Ca（OH）₂的表面上可以通过机械活化剥离，也可以通过SEM图像，EDS光谱和XRD沉淀图确认。在搅拌速度为400 r / min，NaHCO ₃ / V摩尔比为2.80，L / S比为4：的其他反应条件下，研究了20°C至50°C温度对钒浸出效率的影响。1毫升/克 观察到仅在6分钟的反应后钒的浸出效率就超过了99％，而且浸出温度对钒的浸出效率影响很小。过滤后，将浸提溶液用于制备NH ₄ VO ₃晶体煅烧沥滤残渣，得到CaO。通过按照Ca / V摩尔比1.80将CaO添加到含铬的钒酸盐溶液中并在室温下以140 rpm的速度球磨90分钟，V的沉淀效率为99.34％。机械活化不仅可以提高钒的沉淀效率，提高沉淀物的浸出性能，而且可以实现钙盐和结晶液的循环利用。