In order to improve argon blowing efficiency in a 40 ton ladle,numerical simulation and water simulation experiments of the bottom argon flowwere performed.Relationships among the ladle mixing time,slag eye area,different blowing flowrates,and different blowing positions(0,0.56 R,0.62 R,0.67R) are discussed.Results showed that the ladle mixing time decreased when the argon blowing brick distance(from bottom center of the ladle) increased,and decreased significantly when the blowing flowincreased from 70 to 130 L / h.When the blowing flowincreased and exceeded 130 L / h,the stirring effect tended to be stable,and there was little effect on the ladle mixing time.The slag eye area increased as the argon brick distance increased,and was larger when the argon blowbrick was near the ladle wall.Wall shear stress significantly increased as the brick distance increased and was concentrated at the slag wall near the argon flowbrick; this is called the most serious erosion wall.The average wall shear increased exponentially with increasing argon blowing brick distance. In order to improve argon blowing efficiency in a 40 ton ladle, numerical simulation and water simulation experiments of the bottom argon flowwere performed. Relationships among the ladle mixing time, slag eye area, different blowing flowrates, and different blowing positions (0, 0.56 R , 0.62 R, 0.67R) are discussed. Results showed that the ladle mixing time decreased when the argon blowing brick distance (from bottom center of the ladle) increased, and decreased significantly when the blowing flow created from 70 to 130 L / h.When the blowing flow created and exceeded 130 L / h, the stirring effect tended to be stable, and there was little effect on the ladle mixing time. The slag eye area increased as the argon brick distance increased, and was larger when the argon blowbrick was near the ladle wall. Wall shear stress significantly increased as the brick distance increased and was concentrated at the slag wall near the argon flowbrick; this is called the most serious erosion wall. The average wall s hear increased exponentially with increasing argon blowing brick distance.