METHOD FOR CLEANING FLAMEPROOFING FURNACE, METHOD FOR MANUFACTURING FLAMEPROOF FIBER, CARBON FIBER, AND GRAPHITIZED FIBER

[PROBLEMS]It is to provide a method for cleaning an oxidation oven, which can obtain a high-quality carbon fiber immediately after re-operating the oxidation oven, can easily clean the inside of the oxidation oven, and can reduce a period in which production is stopped, a method for producing an oxi...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO, Wataru, UCHIYAMA, Masaomi, KUJI, Yusuke
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	[PROBLEMS]It is to provide a method for cleaning an oxidation oven, which can obtain a high-quality carbon fiber immediately after re-operating the oxidation oven, can easily clean the inside of the oxidation oven, and can reduce a period in which production is stopped, a method for producing an oxidized fiber and a method for producing a carbon fiber including the step of cleaning the oxidation oven using the cleaning method.[SOLUTIONS]A method for cleaning an oxidation oven for subjecting a polyacrylonitrile-based precursor fiber for carbon fiber to an oxidation treatment in an oxidizing atmosphere, wherein: the oxidation oven has a mechanism for circulating an oxidizing gas internally; and the method comprising the steps of: causing a liquid to come in contact with dust adhering to a wall surface of the oxidation oven so that pressure in a direction perpendicular to the wall surface is 2 MPa or more; discharging the liquid out of the oxidation oven to discharge the dust peeled off from the wall surface out of the oxidation oven; and circulating an oxidizing gas having a temperature of 40°C or higher in the oxidation oven.