The wet sticky concentrate will also lower efficiency level of the drier for an extended period of time. Blew into kiln through horn mouth, cold air cools guard plate, and discharged from top after being heated. These are usually located on the roller beds nearest the drive, where movement most needs to be restricted. 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. Stagger the configuration of the 1/2 week section. The tail of the main motor is equipped with a tachogenerator to provide power for the instrument that displays the kiln speed. The raw meal preheating and carbonate decomposition process of the suspension preheater kiln, especially the precalciner kiln, are basically moved to the precalciner system, which makes the movement speed of the materials in the kiln tend to be consistent, and creates conditions for improving the kiln speed, which is also the reason why the speed of the modern precalciner kiln has been greatly increased. Driven by the transmission device, the material advances along the axis of the barrel with the rotation of the barrel, and the lifting plate turns over the material to make it . 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. Small changes due to wear could be adjusted by adding shims. 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. (1) Cylinder is made of 20g and Q235-B steel plate, and it adopts automatic welding. PreviousIgnition Operation Skill of Rotary Kiln, NextHow to Check the Operation of Rotary Kiln. The body of metallurgical rotary kiln is rolled with high-quality killed carbon steel or alloy steel plate and automatically welded; 2. The combustion process of the material is carried out slowly. 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. Hot air enters at the inlet or outlet end and exits at the top of the other end. Under the influence of gravity and the rotation of the cylinder, the material is dispersed and evenly moves to the lower end of the cylinder. The metallurgical chemical rotary kiln is mainly used for magnetization roasting of iron ore in iron and steel plants. Length is not necessarily limited, but it becomes difficult to cope with changes in length on heating and cooling (typically around 0.1 to 0.5% of the length) if the kiln is very long. 1.The working movement principle of materials in the rotary kiln: 2.The combustion principle of fuel in the rotary kiln: 3.The principle of air flow in the rotary kiln, 4. The materials in the kiln continuously move from the kiln tail to the kiln head due to the inclination and rotation of the kiln body. The equipment operates reliably and can save more energy. The discharged end of cylinder has guard plate with high temperature resistance and wear resistance. A 6 x 60 m kiln requires around 800kW to turn at 3 rpm. 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. Due to the inclination and slow rotation of the kiln barrel, the material rolls in the circumferential direction and moves from high temperature to the axial direction. Nevertheless, his designs provided the basis for successful kilns in the US from 1891, subsequently emulated worldwide. Under normal circumstances, it will be divided into transition zone, and the higher temperature is the firing zone. Manufacturer of cement production equipment and accessories, What are the advantages of steel slag vertical mill compared with ordinary vertical mill. The body of metallurgical rotary kiln is rolled with high-quality killed carbon steel or alloy steel plate and automatically welded; 2. 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. These have the advantage of developing extremely high torque. The supporting device of metallurgical and chemical rotary kiln adopts advanced spindle structure. The raw meal powder is fed into the kiln barrel from the lower pipe at the high end of the kiln tail barrel. Save up to 80% https://shrsl.com/3neix Cement mill is the core equipment for grinding material after clinker production. The Kilns of modern cement plants are running at 4 to 5 rpm. The kiln is usually turned by means of a single Girth Gear surrounding a cooler part of the kiln tube, but sometimes it is turned by driven rollers. Exhaust gases contain dust, and there may be undesirable constituents, such as sulfur dioxide or hydrogen chloride. 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 transmission system adopts dual transmissions, which are driven by two main transmission motors respectively. After sintering process, the material is calcined in cement clinker and discharged into cooler machine through kiln head hood. As the kiln rotates, the time of material and lining leakage in high-temperature gas is repeated periodically, so the temperature distribution at different parts is inconsistent, leading to the difference of heat transfer direction. There are three rectangular and solid tires on cylinder. Rotary kiln is the main equipment of cement production. This poses a problem: if the Rotary kiln tyre remains in one position relative to the roller, wear or plastic deformation causes a depression to form on the roller face. Large clearance non scraping pad bearing is adopted for sliding bearing of metallurgical rotary kiln; 4. Here are some principles when we choose refractory materials for each part of the kiln: 6. The production process of metallurgical and chemical rotary kiln is that raw ore is directly fed to the kiln tail through electronic belt weighing scale, belt conveyor, stable material bin and air lock valve. This requires gas-tight seals at either end of the kiln. Copyright 2002-2022 Hongke Heavy Machinery All Rights Reserved. At this exit point the concentrate is either deposited straight into a storage area or taken to the storage area by a conveyor. 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. (2) Transmission system uses single drive. There is enough space for heat dissipation between the cylinders, which can reduce the influence of the bending and deformation of the kiln cylinder on the meshing accuracy, and also has a certain shock absorption and buffering effect, which is beneficial to prolong the life of the kiln lining. The kiln barrel is the trunk of the rotary kiln, which is rolled and welded by steel plates. Rotary kiln is the main equipment of cement production. Get Offer Subscribe to receive our Offer. This turns the kiln very slowly, but enough to prevent damage. As the preheating and carbonate decomposition of the new dry process kiln are moved to the preheater and calciner outside the kiln, the kiln is divided into three zones, namely transition zone, sintering zone and cooling zone. The production process of metallurgical and chemical rotary kiln is that raw ore is directly fed to the kiln tail through electronic belt weighing scale, belt conveyor, stable material bin and air lock valve. In the metallurgical rotary kiln, the heat source is high-temperature flue gas. May 27, 2015 Rotary kiln working principle; May 21, 2015 Compact and Efficient main drive of Rotary Kilns ; May 03 . The ore is first heated in the rotary kiln. Rotary kiln for carbon has the function of heat exchange and automatic monitor for temperature. Temperature differences between the top and bottom of the kiln may cause the kiln to warp, and refractory is damaged. Then be put into feed end through the charger. Rotary Kiln Working Principles And Function In Cement Production. Usually upper and lower "retaining (or thrust) rollers" bearing against the side of tyres prevent the kiln from walking off the support rollers. Views: Pre: GRM series vertical mill turns "waste" into treasure, Next: Slag Cement Association announces slag projects of the year, Home / About Us / Site Map / Copyright 2021 Great Wall Corporation. 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. This provides a controlled escape passage for the fumes and water vapor that is generated by the concentrate drying. According to the formation process of materials, the rotary kiln can be divided into six zones: drying, preheating, carbonate decomposition, exothermic reaction, firing and cooling. To prevent the buildup of concentrate on the flights there are often CHAINS attached to them. In many fields, so the quality requirements for its accessories will be relatively high. . Besides the energy consumed by the magnesite, the heat expenditures are through different areas of the process, such as kiln shell, exit gases, clinker exit, dust etc. In these settings, rotary kilns help to remove impurities, modify physical and chemical properties, bond coatings and colors to base materials and more. The mechanical stop wheels are installed in pairs on both sides of the large ring gear adjacent to the wheel belt, and play the role of limiting the axial movement of the kiln cylinder. Working principle of metallurgical and chemical rotary kiln. But first, so you know what we are talking about lets go through the design of a drier. This removal of the water vapor is one of the functions of the blower. The material to be burned is evenly fed into the kiln barrel from the kiln head hopper through the feeding mechanism. According to its force and action principle, the retaining wheel can be divided into two types: mechanical retaining wheel and hydraulic retaining wheel. The barrel is equipped with a forward-running plate, which makes . The fuel combustion, heat transfer and raw material movement must be coordinated reasonably so that the heat generated by fuel combustion can be transferred to raw materials in time when the raw materials pass through the rotary kiln, which has reached the goal of high yield, high quality and low consumption. Multi-use machine and flexible application It has unique feeding and crushing structure and many kinds of shapes of crushing cavity, which can very conveniently realize conversion between "Using stone to hit stone" and "Using stone . Products. The working principle of the rotary kiln is introduced here for you. The calcination process of metal magnesium rotary kiln has a high degree of mechanization, the operation process is easy to control, and the production capacity is large; calcining. Material is fed into kiln from kiln tail. 01 Jan,1970 UTC+8 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. Wrong refractory materials will not only affect the operation of the cement plant, but also cause production accidents. It sits on the kiln head operating platform through the legs on both sides, and the lower part is connected to the interface of the cooler. Compact and lightweight. Rotary kiln system is the key equipment of cement production, it is necessary to be careful in the selection refractory materials. For successful Kilns in the metallurgical chemical rotary kiln, NextHow to Check Operation! 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