PLUGGING SAND FOR LADLE SLIDING OPENING/CLOSING DEVICE

• Main Authors: TAKASUGI HIDETO, SHIROYAMA AKIRA, NAKAJIMA HIROHISA, AKAI SHINICHI, ISHII KENJI, TANO MANABU
• Format: Patent
• Language: English
• Published: 24.02.1998
• Edition: 6
• Subjects: BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; 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; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RETORTS; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

PROBLEM TO BE SOLVED: To provide plugging sand of a sliding opening/closing device in a ladle which can obtain high natural hole opening ratio. SOLUTION: The plugging sand of the device is substantially composed of 70-90wt% chromite sand and 10-30wt.% silica sand, and the chromite sand is contained at >=95% to the range of 150-850μm grain diameter and >=60% to the range of 200-425μm grain diameter, and the silica sand is contained at >=95% to the range of 200-850μm grain diameter and >=60% to the range of 300-600μm grain diameter.