摘要
在炼焦配煤中合理利用瘦煤并提升其占比,可实现焦化企业降本增效和保护优质炼焦煤资源。为探究焦化厂配煤方案中瘦煤比例添加及方案优化调整对焦炭质量的影响,选取贫瘦煤(MC)和瘦煤(LC1和LC2)及采用工业分析、岩相分析等了解单种煤的基本煤质特性,利用红外光谱、热重分析确定煤样的结构特征和挥发分释放行为,并基于瘦煤的煤质特性,采用40 kg焦炉试验对不同瘦煤比例的配合煤进行焦炭质量评价,探究焦炭质量差异原因。结果表明:基于基础配煤方案,将LC1和LC2的占比增加至35%时,焦炭反应性(CRI)降低,反应后强度(CSR)升高,焦炭质量依然优于基础方案所制备的焦炭质量;在基础方案中,MC能对LC1和LC2进行替换,且替换后的CRI降低及CSR升高,焦炭光学组织中的细粒和中粒镶嵌结构增加,焦炭质量未发生劣化;MC占比增加至11%时,CRI升高以及CSR降低,焦炭质量发生明显劣化。基于瘦煤的煤质特性,配煤中的瘦煤比例可达到较高的配比,为后续工业配煤方案中利用高阶煤提供理论依据。
Rational use of lean coal and increase its proportion in coking coal blend can reduce cost and increase efficiency and protect high-quality coking coal resources.To explore the influence of the addition of lean coal in the coal blend scheme of the coking plant and the optimization adjustment of the scheme on the quality of coke,meager and lean coal(MC),lean coal(LC1 and LC2)were selected to understand the basic coal quality characteristics by proximate analysis and petrographic analysis,and the structural characteristics and volatile release behavior of the coal sample were determined by FTIR spectroscopy and thermogravimetric analysis.Based on the lean coal property,40 kg coke oven test was used to evaluate the coke quality of blended coal with different proportion of lean coal,and the reason of coke quality difference was explored.The results show that when the proportion of LC1 and LC2 is increased to 35%,the coke reactivity index(CRI)decreases,the coke strength after reaction(CSR)increases,and the coke quality is still better than that prepared by the basic coal blend.In the basic scheme,MC can replace LC1 and LC2,and after replacement,CRI decreases,CSR increases,fine-grained and medium-grained mosaic structure increases in the coke optical tissue,and coke quality does not deteriorate.When the proportion of MC in coal blend increases to 11%,CRI increases,CSR decreases,and coke quality deteriorates significantly.Based on the lean coal property,the proportion of lean coal in coal blend can reach a higher proportion,which provides a theoretical basis for the use of high rank coal in the subsequent industrial coal blending scheme.
作者
岳伟明
周文艳
侯晓瑞
周瑞
李鹄飞
申岩峰
王美君
YUE Weiming;ZHOU Wenyan;HOU Xiaorui;ZHOU Rui;LI Hufei;SHEN Yanfeng;WANG Meijun(Shanxi Coking Group Corporation Ltd,Hongtong 041606,China;State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《煤质技术》
2024年第2期73-79,86,共8页
Coal Quality Technology
基金
山西焦化股份有限公司技术开发基金资助项目(GFPMJS(2022)004)
山西省重点研发计划基金资助项目(202102090301002)。
关键词
瘦煤
煤质特性
炼焦配煤方案
40
kg焦炉
焦炭反应性
焦炭质量
焦炭光学组织
lean coal
coal quality characteristics
coking coal blending scheme
40 kg coke oven
coke reactivity
coke quality
optical structure of coke
