連続焼鈍炉内鋼板真温度測定システムの開発
1975 年 61 巻 8 号 p. 2076-2087
詳細
1975 年 61 巻 8 号 p. 2076-2087
In order to measure the temperature of steel strips in continuous annealing furnaces with inert or reducing gases, following items were studied;
(1) The characteristics of emissivity of the steel strips were experimentally studied, which depended on the specification and the temperature of the strips as well as the wavelength of a detector.
(2) Shielding method of stray radiation: energy from furnace walls or heat sources was studied in detail from theoretical and experimental points of view.
This stray energy was found to depend on the shape and the surface condition of the shielding flange, gap between the strip and the flange, the wavelength of a detector and the temperatures of the furnace wall and the steel strip.
On the basis of these results, the system was designed and was made up of radiation pyrometers with the shielding flanges and of contact thermometers for intermittent correction.
The estimated error of the measurement was less than 1%.
