METHOD FOR CONTROLLING HYDRAULIC BORING MACHINE FOR IRON TAPPING HOLE

• Main Authors: FUJII NORIAKI, SASAHARA TAKASHI
• Format: Patent
• Language: English
• Published: 21.09.2006
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; RETORTS; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for controlling a hydraulic boring machine for iron tapping hole with which the boring of the iron tapping hole in a blast furnace can surely be detected. SOLUTION: In the method for controlling the hydraulic boring machine for iron tapping hole, performing the boring of the iron tapping hole by combining the hitting, rotating and feeding of a rod; after detecting anyone or the combination of several items, in which the feeding pressure of the rod is risen up at not less than a prescribed pressure and the feeding advancing speed of the rod is risen up to a prescribed speed; the boring depth of the rod becomes not less than a prescribed distance; a drifter rotating pressure of the rod is reduced to a prescribed pressure; the number of drifter rotations of the rod becomes not less than a prescribed number of rotations; or a drifter chain tension of the rod is reduced to a prescribed tension; the rod is advanced for a prescribed time and thereafter, the rod is pulled out and when the heat-energy of the molten iron flowing out from the iron tapping hole reaches a prescribed level, it is judged that the boring of the iron tapping hole is normally completed. COPYRIGHT: (C)2006,JPO&NCIPI