LATS refining ladle slag modifying with CaO-CaF2

To reduce the slag sticking onto the snorkel of the ladle during the ladle alloying treatment station (LATS) process. CaO-CaF2 (the mass ratio of CaO/CaF2 is 1:1) was employed as the modifier of the LATS refining ladle slag. The effect of CaO-CaF2 on the melting point, viscosity, and desulfurizing capability of the ladle slag was investigated. The melting point of the unmodified ladle slag is 1439°C. When adding 20wt% CaO-CaF2, the melting point is decreased to 1327°C. At 1500°C the viscosity of the unmodified ladle slag is 6.5 Pa-s, which can be decreased lower than 2 Pa-s by adding more than 10wt% CaO-CaF2. The experimental results of desulfu-rization of the melts show that the desulfurizing power of the ladle slag can be enhanced by adding CaO-CaF2.