Apparatus and method for boring through the taphole in a molten

Details Apparatus and method for boring through the taphole in a molten Apparatus and method for boring through the taphole in a molten

1989-02-27

1990-01-23

Kastler, S.

Metallurgical apparatus

Process

Plugging or tapping

266271, C21B 712

Patent

active

048953490

ABSTRACT:
A drill shaft assembly for a blast furnace taphole-opening system includes a drill shaft adapted for receipt of a drill bit at its forward end and for coupling with a hollow drill tool piece at its rearward end. The drill shaft has a solid cross-section along substantially its entire length and is provided, beginning at its rearward end, with an air channel which is in communication with a source of pressurized air for clearing dust from the taphole as it is being drilled. A coupling means is provided so that the drill shaft may be detachably attached to the drill tool piece shaft so that it is readily replaceable.

REFERENCES:
patent: 1304981 (1919-05-01), Hoagland
patent: 2912887 (1959-11-01), Andreasson
patent: 3862750 (1975-01-01), Broom
patent: 4436285 (1984-03-01), Woodings
patent: 4669707 (1987-06-01), Kenning

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