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고로에서 분의 거동에 미치는 미분탄 취입의 영향
Effects of Pulverized Coal Injection on Fines Behaviors in Blast Furnace
HWAHAK KONGHAK, October 1999, 37(5), 767-774(8), NONE
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Abstract
고로공정에서 미분탄 취입량에 따라 증가되는 노내 발생분의 기원파악과 정량화를 위해서 여러 가지 시험을 실시하였다. 고로내에 퇴적된 분과 고로외로 배출된 분을 채취하여 성분분석과 열중량분석, SEM 분석 및 메틸렌 요오드를 이용한 증액분리 방법을 통하여 물리적으로 미연소 미분탄을 선별한 결과 미연소 미분탄과 코크스분이 혼재하는 것을 확인하였다. XRD 분석에 의해 결정질 탄소와 비정질 탄소 피크의 상태강도 크기를 비교분석하므로서 코크스 및 미분탄에서 기원한 탄소의 분류가 가능하였다.
To investigated on the reasons for the fines increase with PCR, several analyses such as TGA, SEM and separation by heavy medium are carried out for blast furnace wet dust and fines obtained by coke sampling. The results show that the fines are composed of unburned pulverized coal and coke. The contribution of char and carbon contents in char and coke fines changes with coal combustibility. It is concluded that the origin of carbon source, coke or coal, can be discriminated by the relative intensity of graphite peak in XRD carbon analysis.
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