Environmental impact analysis of hydrogen shaft furnace-electric furnace process
LI Feng1, CHU Man-sheng2, TANG Jue1, LIU Zheng-gen1
1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
Abstract：Hydrogen metallurgy is one of the effective ways to realize low-carbon and green upgrading of China's iron and steel industry. The hydrogen shaft furnace-electric furnace process based on coal gasification technology is a typical hydrogen metallurgy process which is considered to have broad prospects. The environmental performance of hydrogen shaft furnace-electric furnace (HSE) process was evaluated through life cycle assessments (LCA), and a comparison analysis of environmental impact between HSE process and blast furnace-basic oxygen furnace (BF-BOF) process was also conducted. The results showed that: firstly, the LCA calculated results of HSE process was 2.56×10-11, and GWP100 and POCP contributed 54.16% and 36.76% of total environmental impact, respectively; secondly, decarburization of the syngas and electric furnace production were the key factors leading to massive CO2 emission and energy consumption; thirdly, the total environmental impact of HSE process was 27.41% of BF-BOF process, and the energy consumption and CO2 emission could be reduced by 53.75% and 47.45%, indicating an obvious environmental advantage.
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2021, Vol. 31 
