Mounting method for preventing thermal deformation and rotation jamming of heating furnace bottom roller

The invention relates to a mounting method for preventing thermal deformation and rotation jamming of a heating furnace bottom roller, and belongs to the technical field of heating furnaces in the metallurgical industry. According to the technical scheme, the furnace bottom roller (4) penetrates through a furnace shell (2), a fire-resistant sleeve (5) is arranged on the furnace bottom roller (4) in a sleeved mode, a furnace shell flange (8) is arranged on the furnace bottom roller (4) in a sleeved mode, the furnace shell flange (8) moves upwards, downwards, leftwards and rightwards, the positions of a furnace shell flange upper limit center (11), a furnace shell flange lower limit center (12), a furnace shell flange left limit center (14) and a furnace shell flange right limit center (15) are recorded, the furnace shell flange lower limit center (12) is set as a zero point, the upper and lower positions of the furnace shell flange (8) are adjusted to the position of b = a/2 + (2-6 mm), and the furnace shell f