Chapter 4 inspection and maintenance of dry kilns and equipment. Slide 4 shows a schematic of the interior features of a limereburning kiln. A rotating kiln in a cement plant is the same as a beating heart in our body. Rotary kilns have always had variable speed drives. Serge jorget and david kotrys, fives fcb, france, discuss rotary. Thus, proper maintenance of rotary kilns requires a more dedicated focus and an. A rotary kiln is a steel round shell with refractory lining that rotates. We combine the most recent technological tools and machinery with our experienced employees to give you a topquality professional job at a very competitive price.
Rotary kiln maintenance procedures state of the art rotary kiln maintenance technology 5078 bristol industrial way, bldg 100, buford, ga 30518 phone 770 8318229 fax 770 83357. Kiln alignment services,kiln diagnostic maintenance services. Introduction of rotary kiln tire maintenance hongke. Higher quality means fewer fines, better reducibility and less variation in compression strength. Onsite kiln services for optimised kiln operation flsmidth. Application on rotary tubes, rotary kilns, etc molytrop. The rotary kiln is among the largest type of moving machines made and is subjected to extreme temperatures, power failures, atmospheric conditions, varying loads, and other operating conditions which affect its wear and alignment. Rotary dryer kiln of the different types of dryers that there are the most common is the rotary drum dryerkiln, 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. General service working scope rotary kiln tire and supporter roller resurfacing grinding rotary kiln inspection measurments hot kiln alignment rotary kiln maintenance rotary kiln designproduction and installation trunnions rollers and kiln. In a straight grate, the pellets at the top of the bed are over cooked and those at the bottom are under cooked. Rotary kiln is the heavy equipment, in loss of friction between tire and machine is very large, if work in hard friction state for a long time will not only affect the work efficiency, but also reduce the service life of the rotary kiln. The mechanical maintenance of rotary kilns and dryers seminars will give you.
Rsc provides upgrade services for rotary equipment including kilns, dryers, coolers, and calciners. The rotary kiln maintenance training system features a 7gauge, steel baseplate with provisions for tabletop mounting and adding a magnetic basedial indicator. Rotary kiln alignment methods have come a long way in the recent past, making alignments faster and more precise than ever before. Ozek makina rotary kiln services hot kiln alignment. It is there to calcine every individual particle in thousands of tonnes of raw mix. Exemplary safety programme for maintenance at heracles volos plant for example, in the 39 days of the shutdown for maintenance works at the rotary kiln 1, there were approximately 100 employees and 160 contractors involved all working rotary kiln 1shell replacement, esp fan replacement, kiln 1 refractory replacement, cooler. The rotary kiln provides constant mixing of the pellets, bringing all the pellets to the same temperature. Pdf mechanical maintenance of kiln systems evgeniy.
The object of the process is to transform the pelletized concentrate into hardened pellets that can be used as blast furnace feed or direct reduction furnace feed. Thus, proper maintenance of rotary kilns requires a. The roller support system in both types of kilns has the appropriate amount of. Increasing competition within the cement industry and growing concerns about sustainable cement production have placed more rigorous. What is the maximum continuous shell temperature a kiln stands without permanent damage to the shell. Axial temperature profiles of gas, wall and solids were measured. Modelling and optimization of a rotary kiln direct reduction. The continuity of operation of a lime sludge kiln requires strict maintenance control.
The invention relates to a method for maintaining rotary kiln structural parts, which is characterized in that a maintenance process comprises the following steps. Flsmidth rotary kiln pdf henan mining machinery co. The rotation of the kiln lifts the feed up the side of the kiln, and the energy required to maintain its centre of gravity above the lowest 6 oclock point is the main component 8090% of the energy consumed. Your maintenance teams should include these top five 5 items in routine rotary kiln inspections. Rotary kiln maintenance procedures rotary kiln lubrication. Here, well discuss everything you need to know about refractory, including how it works, the different types, and best practices for preventative care. In the case of kilns containing curtain chains, these also produce an eccentric load. Cement kiln manual pdf search our extensive pdf library for kiln maintenance, kiln assembly, kiln installation, kiln specifications and kiln manuals, instructions. Examining upgrade options when rotary kiln tires are mounted.
Learn industry best practice from senior pkse engineers widely considered to be amongst the best in the business. One of the main maintenance works on rotary kilns is tyre and roller surface machining and grinding works which can be done while the kiln works in full operation at speeds up to 3. Feeding the kiln after preheating program and increasing throughput to nominal capacity. In rotary tubes or rotary kilns materials are heated andor mixed, burned or sintered. Keep the kiln rotating rotary kiln services hot kiln. However, the age of many kiln lines is over 20 years, and maintenance efforts usually rise, especially in older production lines. Everything you need to know on rotary kiln refractory. With the help of our resources, professionals and modern facilities, we are providing various effective services that are applied to plant maintenance.
Refractory, or the lining utilized on the interior of rotary kilns, is a critical component in ensuring process efficiency and prolonging the life of a rotary kiln. Search our extensive pdf library for kiln maintenance, kiln assembly, kiln installation, kiln specifications and much more. Measurements of rotary kiln shell deformation constitute a significant part of our extensive offer of kiln inspection. Kiln guide 1 planned maintenance representing the uk. Other appendix additional issues for unplanned maintenance 1. The rotary kiln was invented in 1873 by frederick ransome kiln shell. At nak kiln services, we offer expert and highquality kiln maintenance, kiln repair as well as kiln technical services. Product knowledge, service maintenance rotary kiln tire maintenance guanghua du rotary kiln is the heavy equipment, in loss of friction between tire and machine is very large, if work in hard friction state for a long time will not only affect the work efficiency, but also reduce. The prevalent type of kiln is the rotary kiln which accounts to about 90. The process system is designed so that material transfer from the grate to the kiln occurs when the material on the grate is sufficiently preheated to have the requisite indurate strength for subsequent processing in the rotary kiln.
The maximum recommended kiln shell temperature varies by plant, by country and by kiln manufacturer, despite the fact that most kiln shells are made of low alloy carbon steel. Over the years, we have acquired the people, experience, equipment and processes to be a leader in rotary kiln demolition and refractory installation. Thorpe has successfully performed work in rotary kilns since 1954. Serge jorget and david kotrys, fives fcb, france, discuss rotary kiln maintenance offerings. Modelling and optimization of a rotary kiln direct. For all kilns constructed of masonry or wood or lined with plywood, coat the inside surfaces with a vapor and corrosionresistant material. There are many types of rotary kiln arrangements for producing cement clinker with each incremental design goal aimed at improving energy efficiency, ease of operation, and product quality and minimizing environmental pollut. Routine inspections and realignment in the event of misalignment should be a part of your regular maintenance program in order to keep your kiln running efficiently for years to come. Adequate maintenance can be accomplished only through regular, frequent inspections of the kiln and auxiliary equipment. This is an important discipline, because heating up and cooling down are long, wasteful and damaging processes. The kiln should be safe to operate both to ensure the safety of the operator and the equipment. How to choose the right lubricant to do the maintenance is to reduce the loss of. Part 3 types of filler bar assemblies, their role in rotary kiln maintenance and advantages over tires mounted on kiln shells the typical filler bar system has gone through several design changes from the first rotary kilns supplied in the early 1900s through today.
Rotary lime kilns are large steel tubes that are lined on the inside with refractory bricks. Rotary kilns have been synonymous with cement and lime kilns probably because of the history of their evolution and development. Zeki ozek from ozek makina rotary kiln services, turkey, offers some insight into maintaining rotary kilns in a cement plant. Heavy localized loadings leading to adverse wear can be encountered if the rollers and riding rings. Of the different types of dryers that there are the most common is the rotary drum dryerkiln, 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 the theories behind these machines are very simple, heat an air space up, and then tumble the material to be dried through this space until it is. This is made from rolled mild steel plate, usually between 15 and 30 mm thick, welded to form a cylinder which may be up to 230 m in length and up to 6 m in diameter 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. The rotary kiln has been used for cement production for about a. Slide 3, below, shows a schematic of the exterior of a modern rotary limereburning kiln. Some good maintenance practices for concrete kiln structures are as follows. Top 5 critical maintenance issues for rotary kilns metso. Rotary kiln body, with drive gear and 2 tyres riding rings a rotary kiln is a pyroprocessing device used to raise materials to a high temperature calcination in a continuous process.
That is why we all work hard to keep the kiln rotating. Raveendra professor malla reddy engineering college affiliated to jawaharlal nehru. Because of the effect to the vessels operation, we also distribute for several burner manufacturers. Abstract rotary kilns are machines that are widely. For the rotax2 kiln, we provide all the necessary services to help you. If you want to learn about different procedures, write me. Proper maintenance of concrete kilns or concrete parts of a kiln consists of prompt recognition and repair of problem areas.
General service working scope rotary kiln tire and supporter roller resurfacing grinding rotary kiln inspection measurments hot kiln alignment rotary kiln maintenance rotary kiln designproduction and installation trunnions rollers and kiln tyres ro. All parts of the rotax2 rotary kiln are visible, which simplifies both inspection and maintenance. Serge jorget and david kotrys, fives fcb, france, discuss. Maintenance seminars are designed for plant engineers, planners, and maintenance and production personnel. Chapter 4 inspection and maintenance of dry kilns and. A better understanding of the rotary kiln and dryer components, design and their limitations. Jun 22, 2018 mechanical maintenance ofcement rotary kiln 1. Rotary lime kilns slides 1 and 2 are the title and outline for the presentation. Rotary kilns are synonymous with cement making, being the workhorses of this industry. Kiln temperature distribution for the base case the feed material bed enters the kiln at ambient temperature and rapidly heats up due to the hot gas in the freeboard. Understand tried and tested rotary kiln and vessel maintenance techniques to ensure your business can reduce maintenance costs, decrease downtime and extend equipment life. It has been reported that cement deposits characterized by israeli geologists in the 1960s and the 1970s place cement making at 12,000,000 bc when reactions between limestone and oil. Introduction of rotary kiln tire maintenance hongke heavy.
Grate kiln systems consist of three major pieces of equipment. We are offering specialized services for kiln, slow speed rotary machine, cooler, dryer, etc, such as. If inspections reveal the need for repairs or replacements, they should be made as soon as possible to avoid drying. Apr 17, 2018 feeding the kiln after preheating program and increasing throughput to nominal capacity.
Geoservex was the pioneer in the field of these measurements, covering the scope ranging from simple measurements of distance and geometric approximation of a crosssection shape, to linear laser scanning and unique computer software development enabling the calculation of. Ottawa sand was heated by passing it countercurrent to a flow of preheated air in a 2. A complete, motorized gear and pinion drive system is provided, allowing for establishment of proper mesh patterns. Kiln guide 1 planned maintenance mineral products association. Modelling and optimization of a rotary kiln direct reduction process 55 figure 3. Adequate kiln maintenance is as essential to efficient dry kiln operation as good design and construction. Rotary kiln services hot kiln alignment on site tyre, roller and thrust roller surface machining and grinding while the kiln is in operation at up to 3,5 rpm. We have our own experienced engineering specialists and draftsmen to prepare detailed construction drawings for each project. Kiln alignment services,kiln diagnostic maintenance. Under the principle of preventive maintenance, maintenance plans should be prepared in advance. Flsmidth rotary kiln pdf jan 06, 1981 a rotary kiln 1 having a plurality of cooler tubes 2 arranged in a planetary fashion therearound the cooler tubes 2 rest in saddles in a ringshaped member 3 surrounding the rotary kiln and are retained in the saddles by caps 4 with clearance so as to permit axial movement and radial heat expansion of the. During the operation of rotary kiln, the wear of parts and the reduction of equipment accuracy will affect the running rate of rotary kiln. Background workshops were held on planned and unplanned.
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