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

作　　者：周峰 闫立强 闫焕敏 杨庆彬 薛立民[4] 李克江[1] 张建良[1] 吴胜利[1] ZHOU Feng;YAN Liqiang;YAN Huanmin;YANG Qingbin;XUE Limin;LI Kejiang;ZHANG Jianliang;WU Shengli(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Tangshan Shougang Jingtang Xishan Coking Co.,Ltd.,Tangshan 063200,China;Hebei Coal Coking Technology Innovation Center,Langfang 065399,China;Shougang Technical Research Institute,Beijing 100043,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]唐山首钢京唐西山焦化有限责任公司,唐山063200 [3]河北省煤焦化技术创新中心,廊坊065399 [4]首钢技术研究院,北京100043

出　　处：《江西冶金》2024年第2期89-95,共7页Jiangxi Metallurgy

基　　金：国家自然科学基金项目(51974019)。

摘　　要：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。Coke is a crucial component in the smelting process of blast furnaces.As blast furnaces continue to develop on a larger scale,the quality of coke must meet higher standards to improve smelting intensity.The alkali metals present in the raw materials of blast furnaces have a significant impact on the structure and metallurgical properties of coke.To ensure stable and smooth operation of the blast furnace,it is necessary to have a clear understanding of the mechanism of coke deterioration during the smelting process.Reasonable measures for quality control of coke should be taken.This study investigates the effects of alkali metals,specifically potassium and sodium,on the structure and performance of coke using a gas-phase adsorption method.The basic performance of coke was tested and analyzed,and the microstructure of coke,including cracks and pores,was observed through industrial computed tomography(CT)scanning.The study found that the degradation of coke structure was greater with potassium vapor than with sodium vapor.As the amount of potassium vapor increased,the degree of coke pulverization,coke crack extension,and pore size also increased.However,after the coke adsorbed 5%sodium vapor,there were only minor changes in the cracks and pores inside the coke.

关 键 词：焦炭 碱金属 微观结构 气孔 

分 类 号：TF526.1[冶金工程—钢铁冶金] TQ520.6[化学工程—煤化学工程]