rotary kiln working principle

The main mechanical accessories include the rotary kiln shell, the rotary kiln tyre, the supporting roller, the rotary kiln stop wheel and the kiln head and kiln tail, etc., which are widely used in metallurgy, building materials, environmental protection, and building materials. The process of material calcination is raw material feeding from the cold end of the kiln. Working Principle of Cement Rotary Kiln: The cement rotary kiln is a cylindrical body with a certain inclination, and the inclination is 3 to 3.5%. The material to be burned is evenly fed into the kiln barrel from the kiln head hopper through the feeding mechanism. When the fuel is mixed with air and heated to a specified level, a high temperature environment for the combustion of the material will be formed. The belt and the kiln cylinder are forced to reciprocate along the centerline of the kiln on the supporting roller at a certain speed and stroke through the hydraulic stop wheel, so that the belt and the supporting roller can be uniformly worn over the entire width, so as to prolong the service life. First is the KILN, this provides the heat, The BURNER is inside this portion. Despite the challenges of their size and their high temperature, the best examples of rotary kiln rotate on their support rollers almost frictionlessly, the power supplied by the drive being almost entirely in order to oppose the eccentric load of the contents of the kiln. Using flexibility seal under the heat resistance spring steel strap compress the cylinder of air cow, the kiln head seal can ensure the seal function when the cylinder of kiln head has a bit deflection. There is another problem that the inclined shell has, the incline causes the shell to want to slide in the direction of the incline. Guard plate at kiln head and air cowl form sleeve space, blew into the kiln from horn mouth, clod air cools the non-working surface of guard plate, which makes this parts work long-term. Only stable material bin is set at the kiln tail, which can reduce investment. The latter are favoured where lifters would cause excessive dust pick-up. Good sealing performance. It is put into the revolving SHELL. The transmission system adopts dual transmissions, which are driven by two main transmission motors respectively. At the same time, a combined elastic coupling is used to improve the stability of the transmission. Rotary Dryer Working Principle. The spacing of the chairs also reduces the amount of heat conduction from the kiln shell to the rotary tyre. The hydraulic blocking wheel is arranged near the underside of the large ring gear adjacent to the belt. In low-temperature processes, and in the cooler parts of long kilns lacking preheaters, the kiln is often furnished with internal heat exchangers to encourage heat exchange between the gas and the feed. Material is fed into kiln from kiln tail. The synchronization of the two transmission systems is realized by adjusting the electrical equipment, so as to ensure the uniform force of the two systems. The direct heat unit is used when it is permissible for the drying gases to come in direct contact with the material being dried. Rotary Kiln Working Principle Because the cylinder has a certain slope and rotates at a certain speed, the raw meal will move from the back end to the front end when it is fed into the rotary kiln. The raw meal powder is fed into the kiln barrel from the lower pipe at the high end of the kiln tail barrel. There are many components of the rotary kiln. Rotary Kiln Working Principles And Function In Cement Production. Rotary kiln manufactured by Xinxiang Great Wall Machinery can be used for cement and limestone making, and it has the characters of big output, low energy consumption and good effect. Rotary kiln refers to rotary calciner, belongs to building material equipment. Cement mill is the core equipment for grinding material after clinker production. Early tyres were occasionally produced as half-sections that could be easily assembled and replaced, but this was very soon abandoned because of the resulting rapid and erratic wear at the joints. . Except the small rotary kiln can use Z2 series small DC motor, the others all use ZSN4 DC motor specially for rotary kiln, which is a special product manufactured on the basis of Z4 series motor and according to the working conditions of the main drive of cement rotary kiln. The fuel is injected from the kiln head and burned in the kiln, and the heat emitted heats the raw meal, so that the raw meal is calcined into clinker. Manufacturer of cement production equipment and accessories, GRM series vertical mill turns "waste" into treasure, Slag Cement Association announces slag projects of the year. These may consist of scoops or "lifters" that cascade the feed through the gas stream, or may be metallic inserts that heat up in the upper part of the kiln, and impart the heat to the feed as they dip below the feed surface as the kiln rotates. The material is the heat receiver, and the kiln lining, as the intermediary of heat transfer, transfers the heat transferred by high temperature gas to the material periodically, playing the role of heat accumulator. In many processes, it is dangerous to allow a hot kiln to stand still if the drive power fails. The auxiliary motor is equipped with a brake to prevent the kiln from reversing under the partial weight of the material and the kiln skin after the motor stops. Tyres, sometimes called riding rings, usually consist of a single annular steel casting, machined to a smooth cylindrical surface, which attach loosely to the kiln shell through a variety of "chair" arrangements. info@chaeng.co - YouTube. NOTE: The customer furnishes and erects the brickwork setting for the dryer in accordance with drawings furnished by Equipment Company. Working Principle: Based on the structure of a traditional rotary dryer, steam tube rotary dryer/ calcinator is equipped with some steam heating tubes inside of the dryer. Heat exchange in a rotary kiln may be by conduction, convection and radiation, in descending order of efficiency. Air, fuel, materials, etc. These flights will remain buried in concentrate. The combustion process of the material is carried out slowly. This sticky concentrate will fill the spaces between the flights. It can be divided into cement rotary kiln, metallurgy rotary kiln and lime rotary kiln. The composite motion of the low-end movement, the raw meal passes through the process of decomposition and sintering in the kiln, and after sintering the cement clinker, it is discharged from the bottom end of the kiln cylinder and enters the cooler. The combustion process of the material is carried out slowly. Inevitably, the rotary tyres are cooler than the kiln shell, and so a small gap allows differential expansion to take place. The rotary kiln is a cylindrical vessel, inclining slightly to the horizontal, which is rotated slowly about its axis. The sealing device of metallurgical rotary kiln can be designed with different sealing forms according to different kiln types. The work comprises of data acquisition and utilization of the same for the evaluation and assessment . The space between tire and raiser block is determined by expansion number, during normal operation, tire can cover cylinder moderate to reduce the radial deformation of cylinder. Kilns usually rotate at 0.5 to 2 rpm. Working principle: The auto-combustion device provides heat resource for our Industrial drier, which adopts down-flow heating method. It consists of electric motor, reducer and so on. Rotary kiln for carbon has the function of heat exchange and automatic monitor for temperature. Whenever possible to apply heat direct to the material to be dried, Rotary Dryers of the Direct Heating Design are used. The tyre rides on pairs of steel rollers, also machined to a smooth cylindrical surface, and set about half a kiln-diameter apart. Rotary kiln is made of steel plate, and inside the kiln body inserts refractory lining, which keeps specified inclination with horizontal line. Rotary kiln tyres are usually a single steel casting, machined to accurately circular dimensions and with a mirror-smooth texture on all surfaces. Of the different types of dryers that there are the most common is the ROTARY DRUM DRYER/Kiln, This type of drier is common not only in the mining industry but you will find them in fertilizer plants, Cement plants, and peat hogs to name but a few. To prevent this additional rollers are attached to the last set of rollers. In addition, sometimes the conveying equipment transports the raw materials from the feeding end to the discharging end. How to Check the Operation of Rotary Kiln, 30 Years of Experience in Rotary Kiln Production, Office Add: Gongye Road and Tonghang Er Road crossing, Shangjie District, zhengzhou, Henan Province, China. These are usually located on the roller beds nearest the drive, where movement most needs to be restricted. The rollers must support the kiln, and allow rotation that is as nearly frictionless as possible. Rotary kiln is the main equipment of cement production. The rotary kiln was invented in 1873 by Frederick Ransome. The combustion of the kiln head fuel produces a . Metallurgy kiln is mainly used to calcine lean iron ore, bauxite, aluminium hydroxide, chrome ore etc. The body of metallurgical rotary kiln is rolled with high-quality killed carbon steel or alloy steel plate and automatically welded; 2. . These require some ingenuity of design, since the tyre must fit the shell snugly, but also allow thermal movement. The refractory selected depends upon the temperature inside the kiln and the chemical nature of the material being processed. Copyright 2002-2022 Hongke Heavy Machinery All Rights Reserved. Rotary Dryer - Kiln For evaporating moisture from concentrates or other products from plant operations, Rotary Dryers are designed and constructed for high efficiency and economy in fuel consumption. The kiln barrel is the trunk of the rotary kiln, which is rolled and welded by steel plates. The body of metallurgical rotary kiln is rolled with high-quality killed carbon steel or alloy steel plate and automatically welded; 2. News Date:2016-06-28 16:43:29. A rotary kiln is a pyroprocessing device used to cause a chemical reaction or physical change in a solid material through the application of high temperature.Materials produce using rotary kiln include: CementsRefractoriesMetalworkingTitanium oxideAluminaVermiculiteIron ore pellets etc.The basic Components of a rotary kiln include:The shell,Refractory liningSupport tyres and rollersDrive gearsHeat exchangers.Four stages in the manufacture of Portland cement:Crushing and grinding the raw materialsBlending the raw materials in the correct proportionsBurning/calcining the mixture in a kilnGrinding the clinker together with some gypsum.All these are discussed in the video, do well to watch till the end and also subscribe to the channel. The concentrate will become wet and sticky which will result in the discharge plugging. Cement rotary kiln is mainly used to calcine cement clinker, it can be divided into dry process and wet process. The heat exchange in the rotary kiln is strong, so the heating will be even. 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 kiln and the ingress of dust. Pre: ball mill liner two installation points, Next: What are the advantages of steel slag vertical mill compared with ordinary vertical mill, Home / About Us / Site Map / Copyright 2021 Great Wall Corporation, Rotary Kiln Active Lime Production Equipment Calcined Lime Kiln Equipment. It assists the natural process of air movement as the hot air mass expands. Is used when it is dangerous to allow a hot kiln to stand if! A kiln-diameter apart allow a hot kiln to stand still if the drive, where movement most needs to dried! This provides the heat exchange in a rotary kiln is rolled and welded by steel plates kiln hopper! 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