F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
39/98
F27D 3/15 (2006.01) C21B 7/12 (2006.01) E21B 10/38 (2006.01)
Patent
CA 1166444
"Blast furnace taphole drill" ABSTRACT OF THE DISCLOSURE A blast furnace taphole drill has a flaring head (3, with cutting edges (5) at its cutting end formed by intersecting angled faces. A central bore (4) carries cleaning air to the cutting end. To prevent blockage of the clearing air bore (4) by debris and possible jamming of the drill, the head has deep radial grooves (6) formed at the bottoms of the valley shapes between the cutting edges (5). The grooves (6) extend radially from the air bore (4) and conduct the air so that it can get behind or under jammed debris. Reduced taphole drilling times can be achieved.
377176
de Boer Sibbele
Gozeling Johannes A.
Spiering Abraham A.
Estel Hoogovens B.v.
Ridout & Maybee Llp
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