CFD simulation is used to improve the continuous-circulation vacuum-degassing process. Fluent software allows you to carry out a parametric study, investigating the effect of argon injection rate on the recirculating flow of steel and studying alternative designs that could improve process efficiency. The model of the degassing process consists of two vessels: the ladle, which holds the steel, and the degasser, which is dipped into the ladle through two cylindrical up-leg and down-leg snorkels. As the vacuum is applied in the degasser vessel, the steel rises into the degasser through the snorkels. The circulation of steel through the degasser is obtained by injecting argon gas into the up-leg snorkel.

Particle paths illustrate the circulation of steel driven by argon gas injection.

Courtesy of Bethlehem Steel
Image postprocessed with FIELDVIEW™ visualization software