BLAST FURNACE PROFILE FOR HIGH-INTENSITY OPERATION Russian patent published in 2020 - IPC C21B7/06 

FIELD: blast furnaces.

SUBSTANCE: blast furnace comprises casing, refractory lining, hearth bottom, cylindrical hearth and tapholes for outlet of fusion products. Useful height h_h, diameter d_h and "dead layer” height h_dl of hearth correspond to the following relationships: h_h/d_h=(0.45–0.50), d_h/D_fw=(0.80–0.85), h_dl/H_h=(0.35–0.40), where D_fw is the diameter of the furnace waist; N_h is the full height of the hearth. Refractory lining of cylindrical hearth in horizontal section in the area of tapholes is made in the form of segment with increased thickness, equidistant from the axis of tapholes by an angle α equal to 20–35°.

EFFECT: as a result, wear of lining of hearth and shaft is reduced, specific consumption of fuel, oxygen and refractory materials is reduced.

1 cl, 2 dwg