The basic components of a Rotary Kiln are the kiln shell, refractory lining, support tyres and rollers, drive gear and internal heat exchanger.

  rotary Kiln Shell,The kiln shell of a Rotary Kiln is made from rolled mild steel plate,This will be usually situated on a east/west axis to prevent eddy currents.Upper limits on diameter are set by the tendency of the shell to deform under its own weight to an oval cross section, with consequent flexure during rotation. The Rotary Kiln length is not necessarily limited, but it becomes difficult to cope with changes in length on heating and cooling ,if the rotary kiln body is very long.rotary kiln Refractory Lining,The purpose of the refractory lining is to insulate the steel shell from the high temperatures inside the Rotary Kiln, and to protect it from the corrosive properties of the process material. It may consist of refractory bricks or cast refractory concrete, or may be absent in zones of the rotary kiln that are below around 250C. The refractory selected depends upon the temperature inside the rotary kiln and the chemical nature of the material being processed. In some processes, such as Cement rotary Kiln , the refractory life is prolonged by maintaining a coating of the processed material on the refractory surface. The thickness of the lining is generally in the range 80 to 300 mm. A typical refractory will be capable of maintaining a temperature drop of 1000C or more between its hot and cold faces. rotary kiln Tyres and Rollers,Tyres, sometimes called riding rings, usually consist of a single annular steel casting, machined to a smooth cylindrical surface, which attach loosely to the rotary kiln shell through a variety of "chair" arrangements. These require some ingenuity of design, since the tyre must fit the shell snugly, but also allow thermal movement. The tyre rides on pairs of steel rollers, also machined to a smooth cylindrical surface, and set about half a rotary kiln-diameter apart. The rollers must support the rotary kiln equipment , and allow rotation that is as nearly frictionless as possible. A well-engineered rotary kiln, when the power is cut off, will swing pendulum-like many times before coming to rest. The mass of a typical 6 x 60 m rotary kiln, including refractories and feed, is around 1100 tonnes, and would be carried on three tyres and sets of rollers, spaced along the length of the rotary kiln. The longest Rotary Kiln may have 8 sets of rollers, while very short Rotary Kiln may have only two. Rotary kiln usually rotate at 0.5 to 2 rpm, but sometimes as fast as 5 rpm. The rotary Kiln of most modern cement plants are running at 4 to 5 rpm. The bearings of the rollers must be capable of withstanding the large static and live loads involved, and must be carefully protected from the heat of the rotary kiln and the ingress of dust. In addition to support rollers, there are usually upper and lower "retaining rollers" bearing against the side of tyres, that prevent the rotary kiln from slipping off the support rollers.

  The rotary kiln equipment connects with a material exit hood at the lower end and to ducts for waste gases. This requires gas-tight seals at either end of the rotary kiln. The exhaust gas may go to waste, or may enter a preheater which further exchanges heat with the entering feed. The gases must be drawn through the rotary kiln, and the preheater if fitted, by a fan situated at the exhaust end. In preheater installations which may have a high pressure-drop, a lot of fan power may be needed, and the fan is often then largest drive in the rotary kiln system. Exhaust gases contain dust and there may be undesirable constituents such as sulfur dioxide or hydrogen chloride. The rotary kiln equipment is installed to scrub these out before the exhaust gases pass to atmosphere.

  Henan zhengkuang mining Machinery Co., Ltd is committed to developing the latest technology of rotary kiln, and warmly welcomes friends all over the world. If you have any interesting with our products, please telephone us: 0086-0371-86079588 or leave us a message: info@zkcorp.com and the professional technological staff will serve you all day long.