Data for: The Effect of Rich-Oxygen Microwave Leaching of Extracting Vanadium from Converter Vanadium Slag
In this paper, the comparison of microwave heating leaching (MHL) and electric heating leaching (EHL) and the mechanism of rich-oxygen microwave leaching of extracting vanadium from converter vanadium slag were investigated. The comparative studies of leaching showed that the vanadium leaching ratio reached 45.76% in 20 min using EHL, but it can reached 95.78% under the same condition of MHL. The MHL mechanism analysis by XRD and SEM showed that the decomposition of the spinel in the converter vanadium slag can be accelerated by the MHL. In addition, the MHL can reduce the granularity and also make the surface of particles become more porous. In general, the leaching of converter vanadium slag by MHL is much more effective than that of EHL in the pressure leaching process. The kinetic studies of MHL and EHL showed that the activation energy of vanadium MHL and EHL were determined to be 15.57 and 48.53 kJ/mol, respectively. The MHL process followed the diffusion control and the EHL process was controlled by chemical reaction. The results showed that the MHL can shorten the process time, improve the productivity, reduce the cost and improve the product quality. Therefore, MHL of converter vanadium slag is an green production technology ensuring economy and feasibility.