METHOD OF INSERTING A DRILL ROD INTO A SHAFT FURNACE TAP HOLE AND DEVICEFOR MAKING THE SAME

摘要

Process for introducing a piercing rod into a semihardened plugging mass with which a taphole of a shaft furnace has been stoppered. This process is implemented with the aid of a piercing machine equipped with a carriage (26) bearing against the wall of the furnace (20). A clamp (46) mounted on the carriage (26) can travel lengthwise on the latter under the action of a hydraulic jack (42) mounted at the front of the carriage (20). After the rod (22) has been threaded through the clamp (46), the jack (42) and the clamp (46) are actuated in order to move the rod forward with the aid of the clamp (46) by a length corresponding to the stroke of the jack (42). The clamp (46) is then opened and returned to the starting position. These operations are repeated until the rod (22) is driven into the taphole to the desired length. A machine for implementing this process is also proposed, as are a number of types of clamps allowing the rod to be gripped both during the introduction and during the extraction of the latter. IMAGE