基于LCA的煤制气-气基竖炉-电炉短流程和高炉-转炉流程环境影响分析  

Environmental performance analysis of coal gasification-shaft furnace-electric furnace process and BF-BOF process based on life cycle assessment

作　　者：李峰 储满生 唐珏 柳政根 周渝生 LI Feng;CHU Man-sheng;TANG Jue;LIU Zheng-gen;ZHOU Yu-sheng(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《钢铁研究学报》2020年第7期577-583,共7页Journal of Iron and Steel Research

基　　金：中央高校基本科研业务资助项目(N172502005,N172506011)。

摘　　要：随着中国煤制气技术的日趋成熟及废钢产生量和累积量增多,基于煤制气的气基竖炉-电炉短流程是钢铁工业低碳绿色发展的重要方向。基于GaBi7.3软件分别对煤制气-气基竖炉-电炉短流程和高炉-转炉(BF-BOF)长流程进行生命周期评价(LCA),对比了短流程及长流程的环境性能优劣。结果表明,煤制气-气基竖炉-电炉短流程和BF-BOF流程LCA结果分别为1.83×10^-11和9.31×10^-11,短流程LCA结果仅为长流程工艺的20%左右。相比BF-BOF流程,短流程吨钢能耗、CO2排放可分别减少60.64%和55.65%,SO2、NOx以及粉尘排放量分别减少74.0%、22.7%和15.9%。综合可知,煤制气-气基竖炉-电炉短流程环境影响远小于传统长流程。With the maturity of coal gasification and the increase of scrap production and accumulation,the gas based shaft furnace-electric furnace process that based on coal gasification is becoming an important direction of low carbon and green development of steel industry.The LCA of coal gasification-shaft furnace-electric furnace(CSE)process and BF-BOF process were carried out using GaBi7.3 software,the environmental performance were investigated thoughtfully.The results show that the LCA results of the CSE process and BF-BOF process are 1.83×10^-11 and 9.31×10^-11.Compared with BF-BOF process,the energy consumption,CO2,SO2,NOx and dust emission of CSE process can be reduced by 60.6%,45.5%,74.0%,22.7% and 15.9%,respectively.All these assessment results show that the CSE process has superior environmental performance than that of BFBOF process.

关 键 词：生命周期评价 煤制气-气基竖炉-电炉流程 高炉-转炉流程 环境影响 能耗 

分 类 号：TQ546[化学工程—煤化学工程] TF55[冶金工程—钢铁冶金]