METHOD FOR LOADING RAW MATERIALS INTO THE BLAST FURNACE Russian patent published in 2021 - IPC C21B7/20 F27B1/20 F27D3/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to loading raw materials into a blast furnace equipped with a cone-free loading device with main hoppers and an auxiliary hopper in the upper part of the furnace, and the auxiliary hopper has a smaller capacity than the main hoppers. The method involves unloading ore (x) loaded into at least one main hopper into a collection hopper, with ore (x) having a recoverability index greater than 55%, and then subsequent loading of ore (x) from the center of the furnace in the direction of the furnace wall using a rotating chute. At the same time, after the start of ore loading (x), only ore (x) is loaded using a rotating chute at least until 45% of the total ore mass (x) to be loaded in one batch is loaded. Then, the unloading of low-reaction ore (y) loaded into an auxiliary hopper and having a recovery index of 55% or less into a collection hopper starts; and then the low-reaction ore (y) is loaded together with the ore (x) using a rotating chute.

EFFECT: invention makes it possible to efficiently reduce ore with low reactivity in a blast furnace.

5 cl, 12 dwg, 1 tbl