External refining auxiliary device

The utility model discloses an external refining auxiliary device which comprises a converter argon station and a steel ladle located at the front end of the converter argon station, and a slag returning mechanism is arranged on the left side of the converter argon station. The slag returning mechanism comprises a fixing support, a baking support, a servo air cylinder, a transmission shaft, a connecting rod, a rotating shaft, a gas baking branch pipe, a connecting fixing frame, a tank cover and a set of gas baking heads. The slag returning mechanism has the beneficial effects that the slag storage tank is adopted by the slag returning mechanism on the left side of the converter argon station, so that high-temperature slag can be contained, heated and poured, the slag returning amount (preventing too much returned slag from being small in clearance and difficult to process or too little returned slag from being unavailable) and the slag returning time (reducing the hoisting waiting time of a crown block) are e