PURPOSE: To prevent the abnormal damages of refractories for lining of the well part and bottom part of a blast furnace by using refractory bricks of SiC base or SiC-C base for the lower step on the side wall of said wall part and the upper step of the bottom part.

CONSTITUTION: Of the refractory bricks for lining of a blast furnace, at least the lowermost step 2A of refractory bricks 2 on the side wall in a well part and at least the uppermost step 3A of refractory bricks 3 on the side wall in a bottom part are built of bricks of SiC base or SiC-C base contg. ≥60wt% SiC. The SiC or SiC-C bricks has high oxidation resistance and the surfaces are coated with SiO2 glass by the reaction with CO and steam which are the atmospheric gases in the furnace, whereby the surfaces are made dense. Thus the oxidation and damage of the side walls in the well and bottom parts are suppressed and the life of the blast furnace are prolonged.