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A novel method to extract vanadium from vanadium-bearing steel slag using sodium carbonate solution

Gao M., Xue X., Li L., Yang H., Bai R., Wang H.

Physicochemical Problems of Mineral Processing

2018

Vol. 54, iss. 3

911--921

A new method using sodium carbonate solution to treat a vanadium-bearing steel slag is proposed. The effects of the particle size, solid-to-liquid ratio, initial concentration of sodium carbonate solution, leaching temperature and stirring speed on the leaching rate of vanadium were investigated. The leaching kinetics of vanadium from the vanadium-bearing steel slag was studied, which indicated that the leaching rate was controlled by the step of diffusion through the solid layer around the unreacted core. The apparent activation energy for the process was 13.75 kJ/mol. By using this process, vanadium could be extracted effectively with the leaching rate of more than 80%.