Based on fluid model and turbulent correct model

the gas flow

mix and transmission of mass and momentum in 210 t ladle refining furnace lid has been simulated and calculated by using flow engineering simulation software Fluent 6. 3.26 to analyze its flow behavior and distribution condition. Results show that with increasing the height of free board in ladle

the circulating region of Ar gas above liquid surface enlarges and the "dead regionn decreases； as Ar flow rate increases to 500 L/min

the flow effect in lid with blowing Ar hole at 0. 68 R is better than that at 0. 3 R; with normal work conditions

the reasonable air exhausting pressure is - 150 Pa; and in conditions with rational air exhausting pressure and blowing Ar location

the Ar flow rate 300 L/min basically meet the requirement

in strong stirring it is available to increase up to 500 L/min.