Physical Simulation On The New Bottom Blowing Technology In Ladle During Casting

To satisfy the strict limitation for inclusion content and to shorten the refining time, a new bottom blowing technology that argon is blew at the bottom of ladle for remove inclusion of liquid steel during in ladle during casting is proposed in this paper.Effect of the bottom blowing location, the blowing rate and the blowing time on inclusion removal rate was systematically studied by physical simulation. The new bottom blowing technology and the traditional technology were compared with in this paper. Under this experimental condition, the following results were obtained:(1) When the gas is blew on position 3# with blowing rate of 0.27×10-5m3·s-1, the inclusion removal rate is better than traditional casting and the relevant removal rate reaches 69.4%.(2) The relevant removal rate of inclusion increases with time prolonged, but decreases in the late casting stage. Staggered bottom blowing technology is suggested during casting process.(3) Under the condition of 30% staggered bottom blowing, the inclusion removal rate of new bottom blowing technology is far better than the traditional blowing technology.(4) The inclusion removal rate is related to the unsteady flow field for the new bottom blowing technology.(5) The optimum parameter is obtained, when gas is blew at position 3# with the suitable blowing rate of 0.27×10-5 m3·s-1 and the blowing time of 30-50% casting period.The results of this paper could provide the theoretical basis for the development and industrial application of the bottom blowing technology of ladle during casting process.