熔融还原炼铁最新技术及工艺路线选择探讨

熔融还原炼铁工艺是非高炉炼铁的重要工艺,也是未来炼铁工艺的重要研发方向,目前投入商业化生产的熔融还原炼铁工艺主要有COREX、FINEX、HIsmelt工艺。为了更及时地了解熔融还原炼铁工艺的最新技术动态,有针对性地选择熔融还原炼铁工艺路线,根据近年来对上述3种主要熔融还原炼铁工艺的技术追踪和研究,阐述了中国在引进、消化COREX工艺过程中,在原燃料优化、解决预还原竖炉黏结问题以及工艺控制系统优化取得的技术进步。介绍了韩国浦项公司FINEX工艺在预还原流化床大型化、降低流化床系统高度、能源高效利用等方面的最新技术成果。并对中国引进HIsmelt熔融还原炼铁工艺后,对HIsmelt工艺未来的技术发展方向提出建议和展望。最后,从原燃料条件、炼铁-炼钢工艺路线、产品质量等方面,对如何选择熔融还原炼铁工艺路线提出建议。

Latest technology of melting reduction ironmaking process and discussion of process route choice

The melting reduction ironmaking process is the most important process route of Non-BF-ironmaking process,also is the most important research direction of the iron-making process in the future. At present,the main melting reduction ironmaking process put into commercial practice is COREX,FINEX,HIsmelt. In order to give an insight into the latest technical trends of melting reduction ironmaking in time,and targeted choose the melting reduction ironmaking process route,according to track and research the main three melting reduction ironmaking process mentioned above,the newest technical advancement of COREX process on raw and fuel optimization was introduced,on solving the sticking of the pre-reduction shaft and process controlling system optimization,and during introduction and digestion of COREX process. The newest technical achievement of FINEX process on the pre-reduction fluidized bed large-scale,the height reduce of fluidized bed system and the efficient utilization rate of energy are introduced. Suggestions and expectations for technology advancement of HIsmelt process in the future after importing HIsmelt process are made. At last,the advice in respect of raw material and fuel material condition,iron-making to steel-making process route, production equality,and other sides are proposed to choose the melting reduction ironmaking process.