Ring Furnace Equipment of Seamless Pipe Production

Ring furnace in the hot-rolled seamless pipe production line plays a role in the tube saw after cutting the qualified length tube from normal temperature (20?)??heated to 1280 ± 5? for the perforating machine perforating process. Ring furnace is the world's most ideal for the heating of circular tube furnace type. The furnace is characterized by a ring-shaped furnace bottom, under the action of the bottom of the furnace bearing device to carry the tube from the feeding end of the rotation to the discharge end, and then by the discharge machine from the discharge furnace door will be removed from a good tube. In the process of the bottom of the tube with the bottom of the furnace through the furnace wall, top burner heated to achieve the qualified discharge temperature, and to meet the temperature uniformity requirements. In order to achieve the desired heating quality, the furnace is divided from the thermal control into several control zones in the circumferential direction to form the preheating section, the heating section and the soaking section in sequence, and the sections can be subdivided into several control sections to improve the control precision. For example, I plant ring furnace is divided into seven control zones, a control zone preheating zone, four heating zone control zone, a hot zone control zone, the last one out of the area. The control zone according to different temperature control, to achieve reasonable heating of the tube to achieve the required heating quality. The basic heating equipment in each district is a burner, the burner will combustion air, fuel at a reasonable ratio (air-fuel ratio) mixed combustion of flame heating tube. The fuel is supplied by the pipeline system. Combustion air is heated by a blower (combustion air blower) via a heat exchanger, and then is distributed by air ducts to burners in all areas for combustion. The temperature adjustment by the automated control system by adjusting the valve opening on the pipeline to achieve fuel and air flow to achieve. The fumes from the combustion of fuel are discharged into the atmosphere through the chimney. Furnace bottom, furnace walls, flue, chimney, etc. are made of refractory masonry, in order to achieve the effect of energy-saving insulation. Compared with other furnaces, toroidal furnace has the following advantages:

1. Ring furnace is best for heating round billet, and can adapt to a variety of different diameters and lengths of complex billet composition, easy to adjust the heating system according to changes in the specifications of the billet.
2. Tube blank placed at the bottom of the interval, the blank can be heated on both sides, heating time is short, uniform temperature, good heating quality.
3. Tube in the heating process with the bottom of the furnace with the rotation, there is no relative movement and friction between the bottom of the furnace, iron oxide skin is not easy to fall off. In addition to the furnace door with no other openings, tightness, less cold air inhalation, and thus less oxidation burning.
4. Furnace tube blank can be empty, you can set aside empty furnace bottom section is not easy to replace the specifications of the tube, flexible operation scheduling.
5. Loading, discharging and furnace operation can run automatically, the operation of the high degree of mechanization and automation. The disadvantage of toroidal furnace is: the furnace is round, occupy a larger workshop area, the layout is more difficult; tube blank at the radiator radial spacing fabric, bottom area utilization is poor, the unit floor area of??the output lower.

A worker from a steel pipe company, which is located in China.