颗粒
高炉
材料科学
造粒
氢
等温过程
冶金
还原气氛
学位(音乐)
金属
还原(数学)
化学
复合材料
热力学
物理
几何学
有机化学
数学
声学
作者
Chen Xu,Anjun Xu,Jianliang Zhang,Zhengjian Liu,Yaozu Wang,Rongrong Wang,Anyang Zheng,Liming Ma
标识
DOI:10.1080/03019233.2022.2071093
摘要
In order to explore the mechanism of hydrogen-rich blast furnace on improving the reduction behaviour of fluxed pellets, the isothermal reduction experiments of fluxed pellets in CO-CO2-N2 and CO-CO2-H2-H2O-N2 atmosphere were studied. The results show that the condition of hydrogen-rich blast furnace at 900°C has a significant effect on improving the reduction degree of fluxed pellets. It is helpful to increase the reduction rate of fluxed pellets at 1000~1100°C. The phenomenon of "reduction stagnation" at 800°C is due to the metallic iron layer formed on the periphery of the fluxed pellets, which hinders the entry of reducing gas. The morphological observation of the reduction products showed that the grid-like metallic iron structure is the key factor to improve the reduction rate and reduction degree of fluxed pellets in CO-CO2-H2-H2O-N2. Finally, the reduction mechanism of flux particles in hydrogen-rich blast furnace is summarized.
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