This finely-tuned mechanical condition requires sophisticated design of the kilns supports. Rotary Dryer Working Principle. 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. (1) Cylinder is made of 20g and Q235-B steel plate, and it adopts automatic welding. The operation principle of clinker cooler is to realize the heat exchange between clinker and cooling air efficiently and quickly. Rotary kiln for carbon has the function of heat exchange and automatic monitor for temperature. Get Offer Subscribe to receive our Offer. The operation principle of clinker cooler is to realize the heat exchange between clinker and cooling air efficiently and quickly. For the single cylinder or multi cylinder cooler used in the past, the cooling air is directly sucked from the cooler by relying on the negative pressure in the rotary kiln . And equipped with lubricating oil automatic heating and temperature control device and temperature measurement device, reliable operation and strong adaptability. Whenever possible to apply heat direct to the material to be dried, Rotary Dryers of the Direct Heating Design are used. +8615638871509. The combustion of the kiln head fuel produces a . The characteristics of the materials change due to the changes in various sections and compositions in the kiln, and their movement speeds are also different. The kiln connects with a material exit hood at the lower end and ducts for waste gases. The flame center temperature in the reduction zone is controlled at about 1000 , and the hot gas temperature is controlled at about 700 . (2) Transmission system uses single drive. Rotary kiln; I hope the above content can help you to some extent. During normal operation, the rotary kiln is driven by main motor through main reducer to transmit power to open gear. Under normal circumstances, it will be divided into transition zone, and the higher temperature is the firing zone. The magnetite enters the cooling belt, where it meets with the incoming gas. The purpose of the refractory lining is to insulate the steel shell from the high temperatures inside the kiln, and to protect it from the corrosive properties of the process material. A well-engineered kiln, when the power is cut off, will swing pendulum-like many times before coming to rest. NOTE: The customer furnishes and erects the brickwork setting for the dryer in accordance with drawings furnished by Equipment Company. SUBSCRIBE TO US. The kiln is a cylindrical vessel, inclined slightly from the horizontal, which is rotated slowly about its longitudinal axis. Rotary kiln is made of steel plate, and inside the kiln body inserts refractory lining, which keeps specified inclination with horizontal line. The supporting device is equipped with automatic temperature measuring and electric heating devices, and there are also spare flow supports for selection. The raw meal powder is fed into the kiln barrel from the bottom of the high end of the kiln tail barrel. Working of rotary kilns. Because the kiln has a certain inclination (generally 3-3.5%), with the help of the continuous rotary motion track, the raw material continuously moves to the hot end, and is stirred in the rotary kiln (rotary kiln), so that the materials mix and contact with each other for reaction. Views: First, put the required materials into the rotary kiln. These have the same purpose as the chains. When driving through rollers, hydraulic drives may be used. This may be a small electric motor with an independent power supply, or a diesel engine. The equipment operates reliably and can save more energy. The rotation of the kiln is used to promote the stirring of the material in the rotary kiln, and the materials are mixed and contacted for reaction. The most common heat exchanger consists of chains hanging in curtains across the gas stream. This requires gas-tight seals at either end of the kiln. The heating tubes run through the dryer with pattern of 1 to 5 concentric circle (s), supplying heat needed by drying process. The QD kiln tail sealing device adopts the cylinder pressing end face contact type, the entire sealing ring is uniformly stressed and can eliminate the adverse effects caused by the installation and the deflection of the kiln shell. Great Wall Rotary Kiln Working principle swfchaeng 100-1000t/d lime rotary kiln,200-5000t/d cement rotary kiln,web:http://www.greatwallcorporation.com/email. Working principle . Working Principle of Ball mi; Rotary Kiln - the equipment f; CONTACT US. In many fields, so the quality requirements for its accessories will be relatively high. 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. There are several rectangular belts along the length of the kiln shell, which bear the weight of all rotating parts such as the kiln shell, kiln lining, materials, etc., and transmit the weight to the supporting device. The kiln head cover is a cover shape made of welded steel plates. to keep the centres of the Rotary kiln tyres co-linear) as small changes take place, such The roller outer face is made wider than that of the Rotary kiln tyre, mainly to allow for contraction of the kiln during shut-down. If it is not possible to apply heat direct to the material to be dried, Rotary Dryers of the Indirect Heating Design can be furnished so that the heated gases will not come in direct contact with the material. This provides a controlled escape passage for the fumes and water vapor that is generated by the concentrate drying. Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Rotary_kiln&oldid=1116491014, Articles needing additional references from December 2019, All articles needing additional references, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 16 October 2022, at 21:11. Driven by adjustable frequency motor, hard tooth surface and three-level cylinder gear speed reducer drives open gear. A 6 x 60 m kiln requires around 800kW to turn at 3 rpm. The metallurgical rotary kiln is equipped with a slow drive device. The support device is a self-aligning sliding bearing structure. 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. 01 Jan,1970 UTC+8 Rotary kiln is mainly composed of kiln shell, transmission device, support device, blocking wheel device, kiln head sealing device, kiln tail sealing device, kiln head cover and so on. The heat exchange in the rotary kiln is strong, so the heating will be even. The gear is connected through a gear train to a variable-speed electric motor. 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 . In addition, the grease is injected into the contact surface of the friction ring by the electric dry oil pump for lubrication, the friction resistance and wear are small, and the sealing effect is good. . The main mechanical parts include rotary kiln shell, rotary kiln tyre, supporting roller, rotary kiln stop wheel and kiln head and kiln tail, etc., which are widely used in metallurgy, building materials, environmental protection, and building materials. The rotation of the kiln can promote the mixing of materials in the rotary kiln (rotary kiln), so that the materials can mix and contact each other for reaction. The work comprises of data acquisition and utilization of the same for the evaluation and assessment . The biggest granularity is no more than 50mm. In these settings, rotary kilns help to remove impurities, modify physical and chemical properties, bond coatings and colors to base materials and more. In addition, sometimes the conveying equipment transports the raw materials from the feeding end to the discharging end. To achieve the rotation a BULL GEAR is attached around the shell section. The kiln head sealing device adopts either SM type (graphite block type) kiln head sealing device or GP type (steel sheet type) kiln head sealing device to meet different working conditions and user needs: The SM type kiln head sealing device adopts the graphite block radial contact type + labyrinth type sealing form, which can automatically compensate the deflection of the kiln cylinder during operation and the reciprocating movement along the axial direction during operation. Cement mill is the core equipment for grinding material after clinker production. 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. Rotary kiln is among the largest items of permanently moving industrial machinery, the largest examples weighing in their fully-loaded form several thousand tonnes. The combustion process of the material is carried out slowly. As the drier revolves, the hammers (formed by grinding balls) will fall against the side of the drier as it passes the top of the driers revolution. Rollers are designed to subtend 60 at the Rotary kiln tyre centre, and this seems always to have been the case. Exhaust gases contain dust, and there may be undesirable constituents, such as sulfur dioxide or hydrogen chloride. The working principle and peatures of rotary kiln. Rotary kilns are used extensively in the production of mineral products such as roofing granules, adsorbents, fillers, desiccants, molecular sieves and more. The kiln barrel part. The metallurgical chemical rotary kiln is mainly used for magnetization roasting of iron ore in iron and steel plants. There are many components of the rotary kiln. As a further precaution to prevent the kiln from falling off its rollers, thrust rollers bearing upon the side of the Rotary kiln tyres are used. Another effect of the gap is that rotary tyres would gradually precess around the rotary kiln, with one complete turn in every 500 turns of the kiln. 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. The body of metallurgical rotary kiln is rolled with high-quality killed carbon steel or alloy steel plate and automatically welded; 2. The transmission system adopts single transmission, which is driven by a main transmission motor. 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. The hot gases may be generated in an external furnace, or may be generated by a flame inside the kiln. 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