高炉喷吹焦炉煤气操作的㶲分析  

Exergy analysis on blast furnace with coke oven gas injection

作　　者：郭同来[1] 储满生[1] 柳政根[1] 王兆才[1] 唐珏[1] 付小佼[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《中南大学学报（自然科学版）》2013年第8期3108-3114,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50804008);教育部新世纪优秀人才项目(NCET-08-0099);东北大学基本科研业务费项目(N110602004)

摘　　要：基于分析理论,建立高炉喷吹焦炉煤气分析模型,系统地研究焦炉煤气喷吹量对高炉损失、热力学完善度和效率的影响,提出高炉喷吹焦炉煤气操作条件下能量利用再优化的途径。研究结果表明:高炉的输入主要为燃料的化学和热风物理;输出主要为铁水的物理和化学、高炉煤气化学以及内部损失;与未喷吹操作相比,当喷吹量为11.89 m3/s时,内部损失和总损失分别降低26.38%和3.98%,外部损失升高2.11%,喷吹焦炉煤气对减少高炉内部的损失更为明显;喷吹焦炉煤气后,高炉的热力学完善度由90.23%上升到92.65%,效率由53.39%上升到54.25%,能量利用的质量得到提高;喷吹焦炉煤气后,铁水和炉渣的物理和化学相对稳定,吨铁炉顶煤气的化学由4.60增加到4.97 GJ,应加强这部分的利用。Exergy analytical model of blast furnace with coke oven gas （COG） injection was established based on the theories of exergy analysis. Effects of COG injection volume on the exergy loss, thermodynamic perfection degree and exergy efficiency of blast furnace were researched systematically, and the ways of energy utilization re-optimization of blast furnace with COG injection were put forward. The research results are shown as follows： the input exergy of blast furnace is mainly chemical exergy of fuel and physical exergy of hot blast, and the output exergy is mainly physical exergy and chemical exergy of hot metal, chemical exergy of top gas and internal exergy loss. Compared with no COG injection, internal exergy loss and total exergy loss are decreased by 26.38% and 3.98% respectively while external exergy loss is increased by 2.11% for 11.89 m3/s COG injection. Namely, the injection of COG is more obvious to reduce internal exergy loss of blast furnace. With the increase of COG injection, the thermodynamic perfection degree is increased from 90.23% to 92.65%, and the exergy efficiency is increased from 53.39% to 54.25%, which shows the improvement of energy utilization quality. With the increase of COG injection, the physical exergy and chemical exergy of hot metal and hot slag are relatively stable. The chemical exergy of top gas per ton of hot metal is increased from 4.60 to 4.97 GJ. Therefore it is import.ant to strengthen the utilization of top gas.

关 键 词：高炉 低碳炼铁 焦炉煤气喷吹 㶲分析模型 㶲评价 

分 类 号：TF531[冶金工程—钢铁冶金] TF538.61