METHOD AND DEVICE FOR IRON SMELTING Russian patent published in 2017 - IPC C21B13/14 

FIELD: technological processes.

SUBSTANCE: invention relates to method and device for recovery of containing iron oxides material. Material containing iron oxides forms a stationary layer in reducing shaft furnace and it is converted into a prereduced material by means of at least one gas fed in the fixed bed under pressure p1. At least part of preliminarily reduced material is introduced into a melting gasifier, wherein with the help of pressurized p2 reducing gas undergoes complete recovery. Note here that top smoke with pressure p3 is removed from the space above the stationary layer, and of stationary layer is removed at least one dust blowout gas under pressure p4. Note here condition p1>p4 and p1>p3 and preferably p4>p3. At least over the part of the path extending previously repaired material in melting gasifier, between reducing shaft furnace and melting gasifier, together with previously restored material towards melting gasifier is carried out at least part of at least one dust blowout gas.

EFFECT: invention is aimed at reducing or preventing formation of deposits of dust in reducing shaft furnace.

12 cl, 5 dwg