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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Leaching of vanadium, sodium, and silicon from molten V-Ti-bearing slag obtained from low-grade vanadium-bearing titanomagnetite
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Leaching of vanadium, sodium, and silicon from molten V-Ti-bearing slag obtained from low-grade vanadium-bearing titanomagnetite

机译：从低品位含钒钛磁铁矿中获得的熔融含钒钛渣中浸出钒，钠和硅

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摘要

The water leaching process of vanadium, sodium, and silicon from molten vanadium-titanium-bearing (V-Ti-bearing) slag obtained from low-grade vanadium-bearing titanomagnetite was investigated systematically. The results show that calcium titanate, sodium aluminosilicate, sodium oxide, silicon dioxide and sodium vanadate are the major components of the molten V-Ti-bearing slag. The experimental results indicate that the liquid-solid (L/S) mass ratio significantly affects the leaching process because of the respective solubilities and diffusion rates of the components. A total of 83.8% of vanadium, 72.8% of sodium, and 16.1% of silicon can be leached out via a triple counter-current leaching process under the optimal conditions of a particle size below 0.074 mm, a temperature of 90A degrees C, a leaching time of 20 min, an L/S mass ratio of 4:1, and a stirring speed of 300 r/min. The kinetics of vanadium leaching is well described by an internal diffusion-controlled model and the apparent activation energy is 11.1 kJ/mol. The leaching mechanism of vanadium was also analyzed.
机译：从低品位含钒钛磁铁矿得到的熔融含钒钛渣中，钒，钠和硅的浸出过程进行了系统的研究。结果表明，钛酸钙，铝硅酸钠，氧化钠，二氧化硅和钒酸钠是熔融的含钒钛渣的主要成分。实验结果表明，液-固（L / S）的质量比显着影响浸出过程，这是因为各组分的溶解度和扩散速率不同。在粒径小于0.074毫米，温度为90A的最佳条件下，通过三重逆流浸出工艺，可以浸出总共83.8％的钒，72.8％的钠和16.1％的硅。浸出时间为20分钟，L / S质量比为4：1，搅拌速度为300 r / min。内部扩散控制模型很好地描述了钒浸出的动力学，其表观活化能为11.1 kJ / mol。还分析了钒的浸出机理。

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