Abstract: An installation for de-slagging casting ladles having a de-slagging machine comprising means for raising each ladle to be de-slagged and tilting it into an inclined de-slagging position with its opening directed downwards. Once de-slagging has been completed the raising and tilting means is used to restore the ladle to its original position. Means is provided for immobilizing the ladle in the inclined de-slagging position, as is a movable de-slagging arrangement comprising a tool-holder head, and means for rotating this head about an axis coinciding with that of the ladle in the inclined de-slagging position.