The Effects of Operational Parameters on the Transport Phenomena in COREX Melter-Grsifier

この論文にアクセスする

この論文をさがす

著者

    • LEE Seung-Cheo
    • School of Materials Science and Engineering, College Engineering, Seoul National University
    • SHIN Myung-Kyun
    • Smelting Reduction Research Team, Research Institute of Industrial Science and Technology(RIST)
    • JOO Sanghoon
    • Smelting Reduction Research Team, Research Institute of Industrial Science and Technology(RIST)
    • YOON Jong-Kyu
    • School of Materials Science and Engineering, College of Engineering, Seoul National University

抄録

Using a computational code developed for simulating the COREX melter–gasifier, the effects of operational parameters on the transport phenomena in the melter–gasifier were studied. The parameters studied were the bed height, C/O ratio, operating pressure and steam injection ratio. When the bed height was increased, the temperature near the combustion zone also increased due to there being sufficient heat exchange between the gas and solid phase. However, the freeboard zone temperature remained constant due to the increased residence time for heat exchange. Operational pressures affect the rate of tar in the coal. However, the extent of the change in the evolved tar as a function of pressure did not vary severely. The variation in the C/O ratio affected the heating rate of coal followed by a drastic change in the heat and mass transfer of solid and gas phases. The combustion zone and the freeboard zone temperature were changed largely by variations in the C/O ratio. The C/O ratio also changed the evolution rate of the coal by the changes in heating rate. From these considerations, the C/O ratio should be carefully controlled for the stable operation. The effects of steam injection into the melter–gasifier were also studied. Up to a steam injection rate of 30 %, the temperature of the combustion zone increased. Steam injection also affected the effluent composition of the gas phase. When the steam injection ratio was increased, the CO/CO<sub>2</sub> ratio was decreased while H<sub>2</sub>/H<sub>2</sub>O ratio was remained unchanged.

収録刊行物

  • ISIJ international  

    ISIJ international 40(11), 1073-1079, 2000-11-15 

    The Iron and Steel Institute of Japan

参考文献:  7件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

ページトップへ