METHOD OF BLAST-FURNACE SMELTING Russian patent published in 2007 - IPC C21B5/00 

FIELD: ferrous metallurgy; blast-furnace process.

SUBSTANCE: proposed method includes mixing of iron ore materials with coal in charge delivery conveyer by placing portions of coal on iron ore materials. Portion of coal is placed between beginning and center of portions of iron ore materials. Coal in intermediate bin of charging device having no cone is placed between lower and center parts. Mixed portions of coal are unloaded into circular zones of furnace top which are equal to 0.6-0.9 radius of furnace top. When specific consumption of coal is increased to level at which hearth is likely to be clogged, portions of coal in charge delivery conveyer are shifted closer to beginning of portions of iron ore materials so that they may be placed in lower part of intermediate conveyer of charging device. Coal is unloaded to furnace top at angular positions of charging device chute corresponding to delivery of coal closer to larger magnitudes of furnace top radius.

EFFECT: reduced consumption of coke.

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