METHOD OF INJECTING AN AGGREGATE INTO A SMALL GAP FORMED IN THE BOTTOM PORTION OF A BLAST FURNACE AND AGGREGATE USED THEREFOR

Disclosed is a method of injecting an aggregate, which can restore the deteriorated thermal conductivity of the inside of a furnace wall due to the formation of a small gap in the bottom portion of the blast furnace. The method includes injecting a filler into a gap having a width of about 1mm or le...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUDA, TSUYOSHI, OTSUBO, HIROAKI, NITTA, MICHIO, TAKEWAKI, KENJI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE 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 LIME, MAGNESIA MECHANICAL ENGINEERING METALLURGY OVENS REFRACTORIES RETORTS SLAG TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed is a method of injecting an aggregate, which can restore the deteriorated thermal conductivity of the inside of a furnace wall due to the formation of a small gap in the bottom portion of the blast furnace. The method includes injecting a filler into a gap having a width of about 1mm or less formed in the bottom portion of the blast furnace. The disclosed filler is a paste made by dispersing a metal aggregate and a refractory aggregate, both preferably having a grain size of about 500?m or less, more preferably between about 75?m and about 300?m, into a bed material. Copper grains having high heat conductivity are preferable as the metal aggregate, mullite beads are exemplary for the refractory aggregate and ethylene glycol is exemplary for the bed material. The metal aggregate preferably has a roundness of about 30% or less.