WASHING METHOD OF BLAST-FURNACE Russian patent published in 2009 - IPC C21B5/00 

FIELD: metallurgy.

SUBSTANCE: method includes loading into furnace of flushing component of blast-furnace mixture in the form of briquette with following correlation of containing in it elements and oxides by mass: O_Fe:Fe=0.29…0.38, where Fe, O_Fe, - mass content of iron, and oxygen, combined with iron, agreeably, CaO:SiO₂=0.005…0.59; slag basicity by (CaO+MgO)/SiO₂ is installed in the range 0.90-0.95 of average quantity during precede five days, and content of silicon in cast iron in limits 1.15-1.25 of average quantity during precede five days. Briquettes loading is implemented in cyclic duty by stations of rotary distributor of mixture of tapered loading device and angular position of duct of chip shed, changing 30-100% iron-ore raw materials 2-10% of all loading deliveries. Loading is implemented up to decreasing of correlation of bottom differential pressure of gas in furnace in the first half of period of works between discharge of melting products to the value of it in the second half of this period up to 0.8-0.95.

EFFECT: increasing of efficiency of blast-furnace and reduction of coke consumption.

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