Bottom roller is an indispensable processing equipment in the steel plate smelting production process. In order to ensure the requirements of steel plate production, the bottom roller also has high requirements for use. The hearth roll is a typical centrifugal casting pipe fitting, one of the important parts for supporting and transporting slabs in metallurgical equipment, and is widely used in steel plate continuous casting and rolling production lines.

In the rolling process, the steel slab must be continuously and stably heated to a rolling temperature of 1050 to 1150°C in the heating furnace, and the slab can be stably supported by the furnace bottom roller to ensure smooth and uniform transportation. Since the middle section of the hearth roll is directly installed in the billet calciner, the furnace gas temperature is as high as about 1150°C during the production process, and it is usually made of high-temperature alloy materials such as ZG45Cr28Ni48W5Si2. At the same time, because the supporting part in the middle of the bottom roller is directly installed in the furnace, and the cone section and the bearing support part are installed in the furnace wall and outside the forging furnace, respectively, the temperature gradient of different parts of the bottom roller is very large, so The bottom roller is generally formed by welding the cylinder, cone and shaft to each other. In order to reduce the burning damage to the inner surface of the cone, a heat insulation board is designed inside the cone. In order to ensure the smooth transportation of high-temperature slabs, it is required that the roller shaft is not deformed and the outer roller ring is heat-resistant and wear-resistant.

Now that everyone understands the application of furnace bottom rollers in metallurgy, it can only be used better if they understand their role. In addition, in order to ensure good performance of the hearth roller and prolong the service life, regular inspection and maintenance are required.