METHOD FOR INJECTING BOTTOM-BLOWING AGITATION GAS IN MELTING FURNACE

• Main Author: YASO ITARU
• Format: Patent
• Language: English
• Published: 17.12.2009
• 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; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RETORTS; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

PROBLEM TO BE SOLVED: To provide a method for injecting bottom-blowing agitation gas in a melting furnace by which in injection of the bottom-blowing agitation gas for agitating molten metal into the melting furnace, strong swiveling flow is generated in the molten metal in the melting furnace thereby the molten metal is sufficiently agitated. SOLUTION: On a furnace bottom wall of the melting furnace, four or more bottom-blowing tuyeres are provided which are arranged at an equal interval on the same circle with the furnace center axis as a center. While the one bottom-blowing tuyere selected from the arranged bottom-blowing tuyeres and having more gas-injecting quantity than those of the others are changed over to the other one successively in the same turning direction, the bottom-blowing agitation gas for agitating the molten metal is injected into the furnace from the whole arranged bottom-blowing tuyeres. COPYRIGHT: (C)2010,JPO&INPIT