| 摘要 |
An installation for cleaning the tubular refractory plungers (12, 13) of a vat (1) for the treatment under vacuum of liquid steel comprising a vat base supporting the plungers (12, 13) arranged vertically and delimiting between them an intermediary space (16). It includes a frame (21) that can be displaced horizontally and vertically and incorporating, at its upper part, some means (30) for scraping from the bottom to the top and simultaneously the external surface of the plungers (12, 13). The means for scraping the plungers (12, 13) are made up of some rakes fitted with scraping fingers, arranged around a circumference and able to be arranged between a retracted position in which the fingers of the rakes are separated from the external surface of the plungers and an active position in which the fingers of the rakes are in contact with the external surface of the plungers. Each rake is formed by a transverse bar and can be displaced between the two positions by a pivoting action generated by, for example, a hydraulic piston. The scraping fingers are mounted at an angle of between 30 and 60 degrees with respect to the horizontal plane and the position of each can be regulated. The frame also incorporates a container for the recovery of the gangue material removed from the plungers and some gunning lances for recoating the plungers. |
