Yiran Natural Gasroller hearth type heating furnaceThe heat treatment materials are mainly transported by roller conveyors, and a roller is installed at regular intervals along the entire length of the furnace. The materials run on the roller, and burners can be arranged in the furnace above and below the roller for heating. There are two types of rollers: ring rollers and flat rollers. Ring rollers are generally only used for heating plates, while flat rollers can be used not only for heating plates, but also for steel sections, pipes, and bars. The material of the outer sleeve of the roller is usually heat-resistant steel, and some also use silicon carbide. The high-temperature roller bottom heating furnace adopts heat-resistant steel furnace rollers with water-cooled shafts and insulation lining or fully water-cooled furnace rollers. In order to prevent the furnace rollers from bending, the rollers working at high temperatures must rotate continuously. Roller bottom furnace is widely used in heat treatment processes such as normalizing, annealing, quenching, and tempering due to the rapid and uniform heating of materials on both sides. The roller bottom heating furnace uniformly heats the thin slab sent by the continuous casting machine to the rolling temperature according to the process requirements. The function of roller bottom heating furnace:

1. The roller bottom heating furnace uniformly heats the thin slab sent by the continuous casting machine to the rolling temperature according to the process requirements.

2. During the rolling of single length billets, the furnace can store several pieces of single length billets. When the rolling mill changes rolls or stops in case of an accident, the thin slab sent by the continuous casting machine can be stored in the heating furnace. The continuous casting machine can produce normally, and the furnace plays a buffering and storage role.

3. On the thin slab continuous casting and rolling production line, in addition to the roller bottom heating furnace, some production processes use electric induction heating, steel coil insulation furnace, and shorter roller bottom furnace combinations, as well as stepper heating furnaces, to meet the above requirements. However, due to various factors, this combined heating method has not been greatly developed. At present, the use of roller bottom heating furnaces with longer furnace lengths is still the mainstream heating equipment in thin slab continuous casting and rolling production processes.

Characteristics of roller bottom heating furnace:

1. Furnace roller: Cobalt alloy roller ring, with good high-temperature performance, not easy to crack, and long service life.

2. Anti deviation function: The furnace roller design cleverly utilizes its own deflection to automatically align the steel billet during operation, effectively reducing production and operating costs;

3. Installation of furnace rollers: The reducer and furnace rollers are connected by rubber joints, simplifying the equipment manufacturing process and reducing engineering investment. In actual production, operating costs will also be correspondingly reduced;

4. Selection of refractory materials for furnace rollers: The roller bottom heating furnace roller is in operation for a long time, and the insulation of the roller is very important. The Yiran roller bottom heating furnace adopts a non baking casting material that is between light and heavy casting materials, effectively solving the insulation of the furnace rollers and achieving good results. The maintenance cost of the furnace rollers is greatly reduced;