低碳绿色炼铁技术发展动态及展望

doi:10.13228/j.boyuan.issn0449-749x.20210736

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Abstract At present, in order to actively respond to a series of issues such as climate change, countries around the world have put forward green emission reduction plans. At the same time, China puts forward the corresponding "carbon peak, carbon neutral" energy conservation and emission reduction goals, and takes "1+N" and other policy systems as the core support to achieve sustainable development strategy, actively respond to climate change, fulfill the obligations of a big country. Steel industry, as the industry with the largest carbon emissions among 31 manufacturing sectors, naturally becomes the "vanguard" in the battle of energy conservation and emission reduction. At present, the complex blast furnace production process is still mainly taking coal, coke and other fossil resources as the main fuel, which makes it become a large carbon consumer, carbon emitter and pollution emitter in the iron and steel process, so the green and low-carbon transformation and upgrading of blast furnace ironmaking process is imminent. This paper discusses from three parts, that is background introduction, development trend of low-carbon green iron making technology and future development prospect. In particular, the development of green and low-carbon iron-making technology is elaborated in detail. Firstly, from two aspects of optimizing energy-saving and low-carbon operation and constructing circular economic environmental protection circle, it discusses how to realize low-carbon and green iron-making of blast furnace process from the perspectives of fine charge operation and improving production technology. Secondly, from the field of non-blast furnace, the development status of direct reduction process and melting reduction process at home and abroad is described, and the corresponding comparison and classification are summarized. Finally, the development trend for this kind of technology is discussed from the angle of innovative ironmaking process (hydrogen metallurgy, intelligent ironmaking). In the end, five aspects are prospected based on the latest developments of current green and low-carbon iron making technology, and the task direction of "green and low-carbon as the direction, energy saving and emission reduction as the target" is clearly defined.

Key words： ironmaking technology hydrogen metallurgy greenhouse effect green and low carbon energy-saving and emission-reduction

Received: 30 November 2021

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