首页|基于瘦煤煤质特性的炼焦配煤方案优化试验研究

基于瘦煤煤质特性的炼焦配煤方案优化试验研究

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  • 国家科技期刊平台
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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。
Experimental study on optimization of coking coal blending scheme based on coal quality characteristics of lean coal
Rational use of lean coal and increase its proportion in coking coal blend can reduce cost and increase effi-ciency 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 proxi-mate 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 rea-son 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.

lean coalcoal quality characteristicscoking coal blending scheme40 kg coke ovencoke reactivitycoke qualityoptical structure of coke

岳伟明、周文艳、侯晓瑞、周瑞、李鹄飞、申岩峰、王美君

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山西焦化股份有限公司, 山西洪洞 041606

太原理工大学省部共建煤基能源清洁高效利用国家重点实验室, 山西太原 030024

太原理工大学 煤科学与技术教育部重点实验室, 山西 太原 030024

瘦煤 煤质特性 炼焦配煤方案 40kg焦炉 焦炭反应性 焦炭质量 焦炭光学组织

山西焦化股份有限公司技术开发基金山西省重点研发计划

GFPMJS2022004202102090301002

2024

10.3969/j.issn.1007-7677.2024.02.007

煤质技术
煤炭科学研究总院

煤质技术

影响因子：0.393
ISSN：1007-7677
年,卷(期)：2024.39(2)
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