| 摘要 |
PROBLEM TO BE SOLVED: To provide an in-furnace measurement instrument capable of exact measurement, while preventing dirt from sticking to a noncontact instrument, in a system which can perform various measurement and cleaning through an in-furnace measurement opening. SOLUTION: The in-furnace measuring instrument 10 is constituted that a noncontact measurement instrument 11 performs various measurement through the optical axis via a measurement opening 22 formed on a furnace wall and reflected by a metal mirror 12 arranged on a first cylindrical path 100 extending toward outside of the furnace along the axial line of the opening. An infrared window 13, arranged on the light incident path of the first cylindrical path 100 and a virgin gas feed means 15 for feeding the virgin gas on the opening side of the infrared window 13 are provided. The virgin gas feed means 15 are arranged around the light incident path. There is provided the stuck slag storage part 18 for storing stuck slag, by dropping the generated stuck slag, at the time of cleaning the opening, while preferably moving the metal mirror 12 and the infrared window 13 for cleaning. COPYRIGHT: (C)2005,JPO&NCIPI
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