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Oxy-coal 버너 사용이 연소대 온도에 미치는 영향

Effects of Oxy-coal injection on Blast Furnace Raceway Temperature

정진경 박판욱

Chung JK Park PW

HWAHAK KONGHAK, October 1998, 36(5), 743-750(8), NONE

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Abstract

Oxy-coal 버너를 사용하여 미분탄 취입을 하는 경우 고로 연소대 온도를 측정하고 연소대 반경방향의 온도에 미치는 영향을 고찰하였다. 연소대 온도 측정은 고로 휴지시 코크스 샘플링을 통해 얻어진 코크스의 XRD분석. R-type 열전대를 이용한 직접측정, 2색고온 온도계를 이용한 연소대 온도 최고점 측정을 통해서 이루어 졌으며, oxy-coal 버너 사용시 버너선단 주위 산소농도를 실험실적으로 측정하였다 이러한 연소대에서 온도 및 산소성분의 거동을 파악하기 위해서 연소대에서 Oxy-coal버너 사용시 코크스와미분탄의 연소반응을 고려한 1차원 연소모델을 사용하여 연소대 반경방향의 온도 및 성분 분포를 구하였으며 위의 측정값과 비교한 결과 매우 잘 일치하는 것을 알 수 있었다.

Oxy-coal injection effects on blast furnace raceway temperature were discussed based on coke sampling experiments through the tuyere of blast furnace, measurement by R-type thermocouple and two-color pyrometer. To analyze the reason for the increase of coal combustion ratio by oxy-coal injection, the oxygen concentration was measured in the simulated experimental of oxy-coal burner. The one-dimensional mathematical model considering the kinetics of coal and coke combustion was developed in other to simulate the combustion characteristics, such as gas temperature and composition in the raceway. It was found that the calculated peak temperature of gas well concurred with the measured temperature according to oxygen enrichment through the oxy-coal burner.

Keywords

Oxy-Coal Injection Blast Furnace Raceway Temperature

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