BLAST FURNACE CHARGING PROCESS Russian patent published in 2014 - IPC C21B7/00 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises preliminary sieving of materials at screens with preset meshes to isolate oversize and undersize fractions. Weight of undersize fraction of agglomerate loaded into blast furnace throat periphery is set subject to agglomerate portion in the charge ion-ore part, its weight in head part of loaded iron-ore portion and agglomerate strength index at reduction-heat treatment of agglomerate oversize fraction. Note here that strength index is defined experimentally from yield of fraction larger than 6.3 mm while undersize fraction feed frequency is set in inverse proportion to in amount in the range of iron-ore feed from each portion to every fifth portion.

EFFECT: higher reliance of the gas reducing capacity, decreased consumption of coke, higher efficiency of blast furnace and sintering plant, longer life.

3 cl, 2 tbl