HEATING FURNACE WITH WALKING BEAMS FOR HEATING CIRCULAR CROSS-SECTION WORKPIECES Russian patent published in 2023 - IPC F27B9/30 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, in particular to rolling production, and can be used when heating round blanks in furnaces before hot rolling. A heating furnace with walking beams for heating workpieces 11 of circular cross-section with a diameter of 20-700 mm contains a walking hearth 3 with movable beams 6 and fixed beams 5, which is equipped with a hot rider 13 located simultaneously in the working layer 7 of the refractory lining and on the reinforcing layer 8 of the refractory lining along its longitudinal axis, while the hot rider 13 is made with a base 14, the vertical part 15, the surface of the vertical part 16, moreover, the base 14 of the hot rider 13 is installed in the center of the fixed beams 5 and movable beams 6 and on the surface 17 of the reinforcing layer 8 of the refractory lining 17, while the surface of the vertical part 16 of the hot rider 13 is flush with the surface of the hearth beams 12 and the working layer 7 of the refractory lining, and the vertical part 15 of the hot rider 13 corresponds to the height of the working layer 7 of the refractory lining. In the second version of the invention, the base 14 of the hot rider 13 is installed with an offset in the horizontal plane relative to the vertical axis of the beams 18, fixed beams 5 and movable beams 6 to the right or left to the vertical axis 19 of the hot rider 13 by a distance l calculated by the formula: l = L·k, where L is the width of fixed beams 5 or movable beams 6, mm; k is a constant coefficient equal to no more than 0.45. In the third variant, the vertical part 15 of the hot rider 13 corresponds to the height of the working layer 7 of the refractory lining and the height of the reinforcing layer 8 of the refractory lining, calculated by the formula: H₁ = h₁ + h₂, where H₁ is the height of the vertical part 15 of the hot rider 13, mm; h₁ is the height of the working layer 7 of the refractory lining, mm; h₂ is the height of the reinforcing layer 8 of the refractory lining, mm. In the fourth variant, the vertical part 15 of the rider 13 corresponds to the height of the working layer 7 of the refractory lining and the height of the reinforcing layer 8 of the refractory lining, calculated by the formula: H₂ = h₁ + h₂ + h₃, where: H₂ is the height of the vertical part 15 of the rider 13, mm; h₁ is the height of the working layer 7 of the refractory lining, mm; h₂ is the height of the reinforcement layer 8 of the refractory lining, mm; h3 is the height of the thermal insulation layer 9 of the refractory lining 5, mm.

EFFECT: reducing the wear of the working layer of the refractory lining of the heating furnace, minimizing the negative impact of “warping” of workpieces, reducing emergency downtime of heating furnaces with walking beams.

9 cl, 6 dwg