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US 5,393,038 AGranted
Method facilitating the introduction of a piercing rod into a taphole of a shaft furnace and special clamp for implementing this method
AssigneePaul Wurth S.A.
InventorEmile Lonardi
Life of this patent
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Abstract
A method is provided for facilitating the introduction of a piercing rod into a taphole previously closed by a taphole clay. The rod is gripped by a clamp which imparts to the rod a powerful axial force and an oscillatory movement about its longitudinal axis.
Claims11
A method for forming and opening a taphole of a shaft furnace, comprising the steps of:
- filling an existing taphole with a taphole clay;
- introducing a piercing rod having a longitudinal axis in said existing taphole before said taphole clay is fully hardened, including;
- applying an axial pushing force to said piercing rod in the direction of said taphole;
- simultaneously rotating or oscillating the piercing rod about its longitudinal axis;
- and
- extracting said piercing rod when the taphole clay is hardened in order to form and open the taphole.
3 more elements
A clamp for introducing a piercing rod, having a longitudinal axis, into a taphole previously filled with taphole clay, said clamp being operably connected to a taphole piercing machine, said clamp comprising:
- a housing adapted for operable connection to a taphole piercing machine drive means, said drive means being capable of imparting to said housing an axial pushing force;
- a clamp body rotatingly supported and guided inside said housing;
- pushing force transmitting means for transmitting said axial pushing force to said piercing rod, said pushing force transmitting means being integral with said clamp body;
- and
- oscillating means for imparting to said clamp body an oscillatory angular movement about an axis coincident with said longitudinal axis of the piercing rod when said rod is mounted on said taphole piercing machine.
2 more elements
Dependencies are inferred from the claim text.