Method for determining high-temperature interaction reactivity between iron-containing furnace materials of blast furnace

Abstract

The invention provides a method for determining the high-temperature interaction reactivity between the iron-containing furnace materials of a blast furnace. The method is used for determining and evaluating the interaction reactivity of the iron-containing furnace materials. Traditionally, the behavior for comprehensively deducing the furnace charge in a high-temperature zone of the blast furnaceaccording to the molten drop performance of the single furnace material is not comprehensive and accurate, the sintered ore and the lump ore / pellet ore react interactively in a high-temperature state, and the high-temperature interaction reaction characteristic has influence on the burden softening and dripping performance of the comprehensive furnace materials. The theoretical support can be provided for the optimized ore blending of the blast furnace by proposing the high-temperature interaction reaction evaluation indexes.

Description

【Technical field】 [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for measuring the high-temperature interactive reactivity between iron-containing charges of a blast furnace. 【Background technique】 [0002] Due to the obvious differences in chemical composition and microstructure between high-basic sinter and acidic lump ore, pellets and other iron-containing materials, when they are in contact with each other, they are prone to sintering at high temperature under the impetus of concentration gradient. Diffusion and chemical reaction of components occur, which changes the formation of low melting point compounds near the contact surface of iron-containing charge, and then affects the softening and melting behavior of iron-containing charge. This reaction is called high-temperature interactive reaction. [0003] Sinter, natural lump ore and pellets are the main raw materials for modern blast furnace ironmaking. Aft...

AI Technical Summary

Problems solved by technology

However, in the blast furnace charge structure, various types of iron ore are not smelted individually into the blast furnace, but mixed according to a certain ratio and then enter the blast furnace. There will be interaction and affect the metallurgical properties of the comprehensive charge

For a long time, people have known little about the interaction between different charges in the blast furnace smelting process, and no researchers have proposed a clear measurement method and evaluation index for the high-temperature interaction between different iron-containing charges.

Images