Large slag ladle repairing technology

The invention discloses a large slag ladle repairing technology. The large slag ladle repairing technology is characterized in that a hanger shaft of a slag ladle is milled through a machining device in a manner that a cutter rotates while the workpiece stays still, so that the diameter of the hanger shaft is reduced; the hanger shaft with the reduced diameter is then sleeved by a shaft sleeve, and the outer diameter of the shaft sleeve is identical to the diameter of the hanger shaft before the diameter reduction. The large slag ladle repairing technology disclosed by the invention has the advantages that the diameter of the worn-out hanger shaft of the slag ladle is reduced to 270 mm through machining, and the hanger shaft is then sleeved by the shaft sleeve with a diameter of 300 mm, so that the slag ladle can be reused after repair, which greatly prolongs the service life of the slag ladle and saves the production cost.