METHOD AND DEVICE FOR MEASURING TEMPERATURE DISTRIBUTION OF REFRACTORY

PURPOSE:To properly grasp the erosion condition of a refractory in real time by strictly and accurately measuring the temperature of the slag line and metal line of a molten metal trough using a temperature-measurement method by an optical fiber. CONSTITUTION:An optical fiber 1 is passed through a protection pipe and further is passed through a guide pipe and is buried in upper, middle, and lower stacues inside a refractory at both sides of a molten metal trough. A measurement part 6 with a light oscillator 6 for transmitting pulse light and a photodetector for detecting Raman scattered light from the scattered light returning to an incidence side, separating stokes light and anti-stokes light, and detecting each intensity is connected to the optical fiber 1. A personal computer 9 controls the light oscillator 6 to cause pulse light to enter the optical fiber 1, at the same time calculates the temperature of a scattered point from the ratio between the stokes light intensity and anti-stokes light intensity detected by a photo-detector 7, and calculates the position to the scattered point from the time it takes until the Raman scattered light returns.