Research progress on high temperature interaction of blast furnace iron-bearing burden
The cohesive zone of blast furnace is one of the key factors to ensure the reasonable distribution of gas flow and low-carbon smelting.Its position and shape are mainly affected by the metallurgical properties of iron-con-taining burden and the interaction of high temperature.The mechanism and influencing factors of high temperature interaction between different iron-containing burdens such as sinter,pellet and lump ore,and the influence of high temperature interaction on the softening and melting properties of burdens and the formation of slag phase are re-viewed.It is pointed out that the interaction between iron-bearing burdens can be optimized by properly adjusting the chemical composition and mixing degree of burdens,optimizing the structure of burdens and improving the reduction conditions of burdens,so as to improve the softening and dripping properties and gas permeability of burdens.In the future,the research on the interaction mechanism of high-quality pellets such as cold-pressed pellets,metallized pel-lets and fluxed pellets with other iron-containing burdens can be strengthened,and the correlation between the phase evolution and the diffusion kinetic behavior of different iron-containing burdens during the interaction process of bur-dens can be deepened,so as to provide reference for the optimization of softening performance and permeability of burdens.
blast furnacesinterpelletlump oreshigh temperature interaction
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