Abstract
The new method of in-situ desulfurization with mechanical stirring of new type impellers was introduced, in which the bubble's dispersion and disintegration of magnesium vapor were the key to boosting the desulfurization efficiency and increasing the utilization rate of magnesium. Effects of different new type of impellers on bubble dispersion and disintegration were studied through bubble image analysis, gas-liquid mass transfer, and power consumption levels of different impeller structures. The results showed that the sloped swept-back blade impeller-2 produces optimal bubble's dispersion and disintegration, as well as higher volumetric mass transfer coefficient and CO2 gas utilization while consuming the least power. Numerical simulation result with Fluent software also showed that the sloped swept-back blade impeller-2 has higher turbulent kinetic energy and better velocity distribution than the other two impellers.
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