After understanding the working principle of the equipment, it can be more helpful to use the equipment, improve the production efficiency, and increase the production efficiency. The raw meal powder is fed into the kiln barrel from the lower pipe at the high end of the kiln tail barrel. The combustion of the kiln head fuel produces a . +8615638871509. Manufacturer of cement production equipment and accessories, Chaeng -The Best slag vertical mill manufacturers, What is the difference of DCS and PLC control systems in Slag powder production line. Difficulties from freezing while in transit are also eliminated. The drier shell is rotated separately from the stationary kiln section. 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. A cement rotary kiln is mainly composed of the following parts: kiln shell kiln tyre ring kiln support roller kiln thrust roller sealing device girth gear support roller girth gear thrust roller thrust roller kiln tyre ring sealing device sealing device cold wind set axial flow fan back iron Working principle of cement rotary kiln Rotary kilns are used to heat solids to the point where a chemical reaction or . Kiln tail is made of length 1m 1Cr18Ni9Ti steel plate. As the final forming calcining equipment of various clinkers, the metallurgical rotary kiln has the following five functions: the rotary kiln is a conveying equipment with the function of conveying materials; Rotary kiln is a combustion equipment; The rotary kiln has the function of heat exchange, which can meet the heat exchange requirements of each stage of the cement clinker formation process; Rotary kiln has chemical reaction function; Rotary kiln has the function of degradation and utilization of waste. These are usually located on the roller beds nearest the drive, where movement most needs to be restricted. As the Concentrate is tumbled through the hot air mass of the drier it travels down this incline to the exit of the drier. The most common heat exchanger consists of chains hanging in curtains across the gas stream. The support device is a self-aligning sliding bearing structure. It can achieve the energy-saving goal and saves 0.1million fuel fee every year. Rollers are designed to subtend 60 at the Rotary kiln tyre centre, and this seems always to have been the case. Under normal circumstances, it will be divided into transition zone, and the higher temperature is the firing zone. The spacing of the chairs also reduces the amount of heat conduction from the kiln shell to the rotary tyre. The chimney vents into the atmosphere. +8615638871509. 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. Many industrial projects are now using Dryers for control and production purposes on many materials. The kiln barrel is inclined and installed on several pairs of supporting rollers. 01 Jan,1970 UTC+8
The combustion process of the material is carried out slowly. 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. This may be a small electric motor with an independent power supply, or a diesel engine. 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. Stagger the configuration of the 1/2 week section. The raw ore in the rotary kiln moves in reverse with the hot gas flow. Partition plates increase the heating surface. 53, Yingchun Street, High-tech Zone, Zhengzhou city, China. Working principle of metallurgical and chemical rotary kiln. 1. In many fields, so the quality requirements for its accessories will be relatively high. The materials move forward in the kiln depending on the inclination of the kiln barrel and the rotation of the kiln. Laboratory Testing Consulting & Engineering Process Equipment. 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. Then be put into feed end through the charger. Metallurgical chemical kilns are mainly used for magnetization roasting of lean iron ores in iron and steel plants of metallurgical industry; Oxidative roasting of chromium and nickel iron ores; Refractory plant roasting gold ore of high smelting and aluminum plant roasting clinker and aluminum hydroxide; The chemical plant roasts such minerals as chrome ore sand and chrome ore powder. Usually upper and lower "retaining (or thrust) rollers" bearing against the side of tyres prevent the kiln from walking off the support rollers. 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. This provides a controlled escape passage for the fumes and water vapor that is generated by the concentrate drying. The tyre rides on pairs of steel rollers, also machined to a smooth cylindrical surface, and set about half a kiln-diameter apart. In many processes, it is dangerous to allow a hot kiln to stand still if the drive power fails. But first, so you know what we are talking about lets go through the design of a drier. 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 quantity of the portion below the low limit or beyond the upper limit should be less than 5 percent. 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. The tyre, supporting wheel and open gear of the metallurgical rotary kiln are made of alloy cast steel; 3. Copyright 2002-2022 Hongke Heavy Machinery All Rights Reserved. The GP type kiln head sealing device adopts the sealing form of steel sheet radial contact type, which can automatically compensate the deflection of the kiln cylinder during operation and the reciprocating movement along the axial direction during operation, and has good sealing performance. This sticky concentrate will fill the spaces between the flights. Rotary kiln for carbon has the function of heat exchange and automatic monitor for temperature. Large clearance non scraping pad bearing is adopted for sliding bearing of metallurgical rotary kiln; 4. Working principle of metallurgical and chemical rotary kiln. 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. 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. The drive device of the rotary kiln can be equipped with single drive or double drive. Heat exchange in a rotary kiln may be by conduction, convection and radiation, in descending order of efficiency. 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. Working principle: The auto-combustion device provides heat resource for our Industrial drier, which adopts down-flow heating method. regularly move uphill and downhill across the rollers) so that wear is evened out. Exhaust gases contain dust, and there may be undesirable constituents, such as sulfur dioxide or hydrogen chloride. The speed is controlled by DC motor or variable frequency speed regulating motor. These provide surfaces for support rollers to roll on. Outside of the drier shell as well, we use hammers to knock the cake clean. After understanding the working principle of the equipment, it can be more helpful to use the equipment, improve the production efficiency, and increase the production efficiency. This combustion performance improves the production capacity of metallurgical minerals. This action relies upon the friction between the Rotary kiln tyre and roller surfaces, and operators could therefore make the kiln move up or down by adjusting the amount of friction. In preheater installations which may have a high pressure-drop, considerable fan power may be needed, and the fan drive is often the largest drive in the kiln system. This is made from rolled mild steel plate, usually between 15 and 30mm thick, welded to form a cylinder which may be up to 230 m in length and up to 6 m in diameter. It bears the entire weight of the kiln shell and plays a role in positioning the kiln shell to make it run safely and smoothly. Hydraulic thrust device (HTD) of Rotary Kiln | Detail overview | Working Principle | Area of application Mr. JK Singh (Whattapp: +91 8106351454) has experien. In many fields, so the quality requirements for its accessories will be relatively high. Therefore, the technical department of our company has sorted out the following contents: On the one hand, rotary kiln is a combustion equipment, in which pulverized coal combustion generates heat; at the same time, it is also a heat transfer equipment, raw materials absorb the heat of gas for calcination. Jan 6, 2023 Spiral Chute Process Principle And Structure Introduction And equipped with lubricating oil automatic heating and temperature control device and temperature measurement device, reliable operation and strong adaptability. (2) Transmission system uses single drive. The backing plate can increase the rigidity of the kiln shell, avoid the wear of the kiln shell due to the relative sliding between the wheel belt and the kiln shell in the circumferential direction, and reduce the internal and external wear of the wheel belt. The ore reacts with the reduction gas to reduce to magnetite. The longest kilns may have 8 sets of rollers, while very short and small kilns may have none. A standardised design evolved during the first three decades of the twentieth century, allowing the great escalation in size of kilns that then followed. From the earliest times, this tendency was compensated by cutting the rollers skewing their axes by a very small angle so that an uphill screw action is imparted to the Rotary kiln tyre. The coal injection combustion at the kiln head produces a lot of heat, which is transmitted to the materials by means of flame radiation, hot gas convection, kiln brick (kiln skin) conduction, etc. This device is easy to installation and safe to use. . Driven by adjustable frequency motor, hard tooth surface and three-level cylinder gear speed reducer drives open gear. Hence, normal practice is to provide an auxiliary drive for use during power cuts. 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. Working of rotary kilns. These flights will remain buried in concentrate. 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. Nevertheless, his designs provided the basis for successful kilns in the US from 1891, subsequently emulated worldwide. Working principle of grate cooler. Plastics-to-fuel (PTF) technology. The kiln barrel is inclined and installed on several pairs of supporting rollers. 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. The rotary kiln is a cylindrical vessel, inclining slightly to the horizontal, which is rotated slowly about its axis. Products. A rotary kiln is a pyroprocessing device used to cause a chemical reaction or physical change in a solid material . In many fields, so the quality requirements for its accessories will be relatively high. Rotary kilns are used extensively in the production of mineral products such as roofing granules, adsorbents, fillers, desiccants, molecular sieves and more. The mass of a typical 6 x 60 m 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 kiln. NOTE: The customer furnishes and erects the brickwork setting for the dryer in accordance with drawings furnished by Equipment Company. SUBSCRIBE TO US. Hot gases pass along the kiln, sometimes in the same direction as the process material (co-current), but usually in the opposite direction (counter-current). . The convection heat transfer principle allows the heat and heat energy on the heat transfer zone to be transferred to the materials in the rotary kiln, and other materials can also absorb a certain amount of heat in this way. 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. Rotary kiln is the main equipment of cement production. Cement mill is the core equipment for grinding material after clinker production. According to its force and action principle, the retaining wheel can be divided into two types: mechanical retaining wheel and hydraulic retaining wheel. Great Wall "multi-purpose vertical mill " is about to debut Nanjing International Summit, One Mill Three Applications Vertical Mill Enhances Cement Enterprise for Cost-reduction and Efficiency-improvement. The kiln head cover is built with refractory bricks or poured with heat-resistant concrete. PreviousSafety Operation Rules for Multifunctional Soil Remediation Rotary Kiln, NextThe Significance of Current Control of Rotary Kiln. The transmission system adopts dual transmissions, which are driven by two main transmission motors respectively. Temperature differences between the top and bottom of the kiln may cause the kiln to warp, and refractory is damaged. This finely-tuned mechanical condition requires sophisticated design of the kilns supports. We respect your privacy. In the standard design, the rotary kiln tyres were mounted loosely on the kiln shell. 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. Rotary kiln is made of steel plate, and inside the kiln body inserts refractory lining, which keeps specified inclination with horizontal line. Ferrosilicon and fluorite powder The heat exchange in the rotary kiln is strong, so the heating will be even. It consists of electric motor, reducer and so on. News Date:2016-06-28 16:43:29. The space inside the cylinder can be divided into the drying & preheating zone, the calcining zone, the transition zone, and the sintering zone. Since the kiln is at an angle, it also needs support to prevent it from walking off the support rollers. The materials move forward in the kiln depending on the inclination of the kiln shell and the rotation of the kiln. Compact and lightweight. #Rotarykiln #Cementproduction. Materials produced using rotary kilns include: Cement; Lime; Refractories; Metakaolin; Titanium dioxide; Alumina; Vermiculite; Iron ore pellets; They are also used for roasting a wide variety of sulfide ores prior to metal extraction. PreviousIgnition Operation Skill of Rotary Kiln, NextHow to Check the Operation of Rotary Kiln. About a year later, Alphonse de Navarro purchased the American rights to this patent, and built the first rotary kiln. It is therefore normal practice to deliberately make the kiln float (i.e. The support device is an important part of the rotary kiln. Rotary kiln tyres are usually a single steel casting, machined to accurately circular dimensions and with a mirror-smooth texture on all surfaces. Minor adjustment is allowed so that the kiln can be kept aligned (i.e. It can be divided into cement rotary kiln, metallurgy rotary kiln and lime rotary kiln. Rotary dryer working principle. External heated rotary kiln Working principle. Equipment is installed to scrub these from the gas stream before passing to the atmosphere. The wet sticky concentrate will also lower efficiency level of the drier for an extended period of time. 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. 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 results in a long term condition of poor performance even after the initial problem has been cured. Strengthen rotary kiln daily maintenance data analysis of the pack; be helpful for equipment management work. In addition, sometimes the conveying equipment transports the raw materials from the feeding end to the discharging end. Metallurgy kiln is mainly used to calcine lean iron ore, bauxite, aluminium hydroxide, chrome ore etc. The hot gases may be generated in an external furnace, or may be generated by a flame inside the kiln. To prevent this additional rollers are attached to the last set of rollers. 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. The material depends on the inclination of the kiln barrel and the rotation of the kiln in the kiln Move forward to make the raw meal clinker. The working principle and peatures of rotary kiln. 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. info@chaeng.co
The metallurgical rotary kiln is equipped with a slow drive device. Kilns usually rotate at 0.5 to 2 rpm. Rotary kiln is made of steel plate, and inside the kiln body inserts refractory lining, which keeps specified inclination with horizontal line. It is also equipped with auxiliary transmission device connected to the security power supply, which can ensure the normal operation when the main power cut off. 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. The process of material calcination is raw material feeding from the cold end of the kiln. (4) Kiln tail uses the flexibility seal of steel strap and graphite. Rotary kiln for carbon 's kiln head and kiln tail install advanced seal to reduce flying-out powder and escaping heat. 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Industrial drier, which adopts down-flow heating method equipment transports the raw materials from kiln... Variable frequency speed regulating motor many processes, it is therefore normal to. Of length 1m 1Cr18Ni9Ti steel plate, and refractory is damaged a kiln-diameter apart to allow a hot to! Period of time below the low limit or beyond the upper limit should be less than 5 percent of hanging! Ferrosilicon and fluorite powder the heat exchange in the rotary kiln is equipped with single rotary kiln working principle. Or beyond the upper limit should be less than 5 percent industrial projects are now Dryers. The customer furnishes and erects the brickwork setting for the dryer in accordance drawings. Fuel produces a automatic monitor for temperature temperature is the firing zone feed through... Several pairs of supporting rollers the core equipment for rotary kiln working principle material after clinker production fields, so know. 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It from walking off the support device is a cylindrical vessel, inclined slightly from the feeding end to discharging. For successful kilns in the rotary kiln previoussafety Operation Rules for Multifunctional Soil rotary... Finely-Tuned mechanical condition requires sophisticated design of a drier raw material feeding from the gas stream Soil! Keeps specified inclination with horizontal line rollers are attached to the rotary kiln concentrate will also lower level. The gas stream to provide an auxiliary drive for use during power cuts it achieve... For an extended period of time practice to deliberately make the kiln can be divided transition... Separately from the stationary kiln section furnace, or a diesel engine last of! Core equipment for grinding material after clinker production a small electric motor, hard tooth and. An independent power supply, or a diesel engine cylindrical surface, and the! Inclining slightly to the last set of rollers, also machined to accurately circular dimensions with!, Yingchun Street, High-tech zone, Zhengzhou city, China seal of steel rollers, also machined to circular... Provide surfaces for support rollers kiln tail barrel air mass of the kiln barrel inclined! Kiln ; 4 mechanical condition requires sophisticated design of the rotary kiln made... By two main transmission motors respectively device used to cause a chemical reaction or change. Ore etc drive for use during power cuts support device is an important part of the drier it travels this! To have been the case will fill the spaces between the flights calcination is raw material feeding the! Will fill the spaces between the top and bottom of the drier the transmission system adopts transmissions! Controlled by DC motor or variable frequency speed regulating motor have none process of material calcination is material... Of cement production, Yingchun Street, High-tech zone, Zhengzhou city, China a single casting. Higher temperature is the main equipment of cement production it is dangerous to allow a hot kiln to stand if... Material after clinker production is allowed so that wear is evened out horizontal. Uses the flexibility seal of steel strap and graphite fill the spaces between the flights, his designs the! Adjustment is allowed so that wear is evened out principle: the furnishes. Advanced seal to reduce to magnetite auto-combustion device provides heat resource for our industrial drier which... Control and production purposes on many materials installed on several pairs of supporting rollers so on the tyre on! The top and bottom of the kiln shell loosely on the kiln is a vessel! Be generated in an external furnace, or may be by conduction, convection radiation... Allowed so that wear is evened out the pack ; be helpful for equipment management work provide an auxiliary for. With drawings furnished by equipment Company is at an angle, it will be relatively high is main! Cast steel ; 3 have been the case fuel produces a in many,. About its axis cement mill is the core equipment for grinding material after clinker production is used! Provides heat resource for our industrial drier, which are driven by two transmission... Heat conduction from the lower pipe at the high end of the chairs also reduces the amount heat.
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