Measurement of the Molten Steel Temperature Using the Sapphire Fiber

사파이어 광섬유를 이용한 용선 온도측정

  • Kim, Hasul (Technical Research Laboratories, Pohnag Iron & Steel Co., Ltd.) ;
  • Homun Bae (Technical Research Laboratories, Pohnag Iron & Steel Co., Ltd.)
  • Published : 2000.02.01

Abstract

Sapphire fiber has been used to provide an optical path for the total radiation pyrometry. In measuring the temperature, we use the two-color detector, which consists of a high-performance Silicon detector mounted in a "sandwich" configuration over a Germanium detector. Sapphire fiber can withstand high temperature in the molten steel for two and a half hours. The maximum value of the error is the $\pm$2.5$^{\circ}C$ in the range of 152$0^{\circ}C$~1$600^{\circ}C$. This paper presents the simple scheme for measuring the molten steel temperature in the blast furnace of the iron & steel making process.g process.

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