METHOD OF BLOWING-IN OF BLAST FURNACE Russian patent published in 2004 - IPC

FIELD: ferrous metallurgy; production of cast iron in blast furnaces. SUBSTANCE: proposed method includes loading blowing-in burden at constant ore loading of 2.8-3.5 t/t of coke beginning with first portion of iron-ore materials which is placed in furnace at height inversely proportional to hot blast temperature at moment of blowing-in of furnace. Hearth of furnace is loaded with coke and intact automobile tires at outer diameter lesser than d_a, pieces of tires lesser than d_a in size through ports of air tuyere units, where d_a is outer diameter of flange of intermediate cooler. Tires are loaded in the following amount, t: M=[0.0039+0.013 (V_bl-0,3)]•V_us.vol,], where V_bl is flow rate of blast, cu m/min per cu m V_us.vol of useful volume of furnace. Loading the tires is started after filling the hearth with coke to height H_t = 9,0,4M/D², where D is diameter of furnace hearth, m considering H_t from level of air tuyeres, portion of tires are M_t = M/4 each are covered with coke of mass 0.79 M, where M is mass of tires loaded into hearth. EFFECT: increased yield of hearth gas; low cost of energy carrier. 6 cl, 4 dwg, 5 tbl, 1 ex