Tap hole drilling machine for blast furnace, drill bit for use in tap hole drilling machine, and tap hole drilling method

PCT No. PCT/KR97/00080 Sec. 371 Date Jan. 7, 1999 Sec. 102(e) Date Jan. 7, 1999 PCT Filed May 8, 1997 PCT Pub. No. WO98/50590 PCT Pub. Date Nov. 12, 1998A tap hole drilling machine, a drill bit for use in it, and a drilling method are disclosed. A nitrogen gas supply line for pressurised nitrogen as...

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Hauptverfasser:	LEE, JOUNG YUL, KIM, GAP YEOL, PAE, DONG SEOG
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY MANUFACTURE OF IRON OR STEEL METALLURGY METALLURGY OF IRON
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