碱金属对高炉焦炭结构及性能的影响Influence of alkali metals on the structure and properties of blast furnace coke
周峰,闫立强,闫焕敏,杨庆彬,薛立民,李克江,张建良,吴胜利
摘要(Abstract):
焦炭在高炉冶炼过程中发挥着重要作用,高炉的大型化发展以及冶炼强度的提高对焦炭的质量提出了更高的标准,高炉入炉原料中的碱金属对焦炭的结构和冶金性能均有显著影响,为了保证高炉稳定顺行,有必要清晰了解焦炭在高炉冶炼过程中的劣化机制,并采取合理的焦炭质量控制措施。本研究采用气相吸附法考察了碱金属钾和钠对焦炭结构及性能的影响,对焦炭的基础性能检测分析,并采用工业计算机断层扫描(CT)观察焦炭的裂纹及气孔等微观结构。结果表明,钾蒸气对焦炭结构的劣化程度大于钠蒸气,并且随着钾蒸气含量增加,焦炭粉化程度增大,焦炭裂纹进一步延展,孔径增大;但是,焦炭吸附5%钠蒸气后,焦炭内部的裂纹及孔隙变化较小。
关键词(KeyWords): 焦炭;碱金属;微观结构;气孔
基金项目(Foundation): 国家自然科学基金项目(51974019)
作者(Author): 周峰,闫立强,闫焕敏,杨庆彬,薛立民,李克江,张建良,吴胜利
DOI: 10.19864/j.cnki.jxye.2024.02.003
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