Cement mill drives pdf free

Philadelphia gears rugged, hightorque cement mill drives are vital links in the manufacturing process of cement plants worldwide. The ball mill is used to grind many kinds of mine and other materials, or. As the drum rotates, the motion of the balls crushes the clinker. Falk caption reads, 2205tcd with lube system and turning gear. Abb process control solutions for cement plants abb. Parts of electrical drives, choice of electrical drives, status of dc and ac drives, dynamics of electrical drives, fundamental torque equation, speed torque conventions and multiquadrant operation. Cement clinker is usually ground using a ball mill. Content quality of clinker kiln operation parameter cooler operation burner operation. Cement mill certificates, also called mill test reports, contain a lot of information that can prove useful for tracking changes in your concrete and controlling variability in your mix. Cement plant from an african cement plant menzel received the order to supply a 100% interchangeable motor to the existing main mill drive.

Cement mills and raw mills for high throughput rates. More than 30 raw materials are known to be used in the manufacture of portland cement, and these. Ball mill is an efficient tool for grinding many materials into fine powder. Cement mill drives transmission mechanics engines scribd. Our awardwinning process control solutions provide easy single window access to the process, production, quality and business information from the most remote location to corporate headquarters. No matter what type of material has to be ground cement raw material, cement clinker or granulated blastfurnace slag and how different their grindability and abrasiveness may be, the mvr mill ensures throughput rates of a different dimension, around the clock, reliably and on the long term. Our ok mill grinding solution skilfully comminutes raw material, cement and slag. Pdf evaluation of synchronous motors on grinding mills. The drum rotates approximately once every couple of seconds. The starting current must be limited to a maximum of two times full load value to minimise. Main mill drive for a cement plant menzel elektromotoren. Cement mill process requirement of mill motors kiln drives. A cement mill or finish mill in north american usage is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement. Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment.

A pioneering innovation in 1970, siemens developed the first gearless drive for the sudbayerisches portlandzementwerk in. Cement grinding vertical roller mills versus ball mills. Gap of outer cage wheel sealing 25 35 mm gap of inner cage wheel sealing 10 30 mm. It iscomposed of calcium silicates and someamount of gypsum. Dear experts, we have two identical cement mills ball mills of 140 tph capacity with twin drives each drive 2500 kwh. Most mill test reports are one page, identify the astm or aashto cement type, and list primary chemical and physical properties measured by sample testing.

Here the inching drive provides positional accuracy and holding capabilities for mill shell liner replacement and other operations. Output torque up to 4 million nm high gear ratios allow the use of lowcost 4pole motors highest reliability thanks to proven components and modules quick assembly disassembly of the bevel pinion under the mill. Mar 03, 2015 ball mill is an efficient tool for grinding many materials into fine powder. The first gearless mill drive gmd with a power of 6. Common types of grinding mills include ball mills and rod mills. Cement mill drives free download as powerpoint presentation. Jan 07, 2015 nael shabana 20102 in the name of allah, the beneficent, the merciful content 1. You can easily adjust it to grind any feed material and produce multiple cement types in the same mill. Most cement is currently ground in ball mills and also vertical roller mills which are more effective than ball mills. As a kind of cement grinding machine, cement mill is the equipment used for grinding the hard, nodular clinker from the cement kiln into the fine grey powder that is cement cement grinding mill is normally driven. A motor with self control has the characteristics of a dc motor with respect to both steadystate and dynamic behaviour. Gentlemen, anybody in this forum who have had some practicalextensive experience on vertical roller mill being used for cement grinding. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users.

Fixed versus variable speed control the most common flow control method is by means of a fixed speed motor where the flow is adjusted by a mechanical device. Basic motor specifications begin with determining the motor nameplate hp and rpm. Cement mill process requirement of mill motors kiln. For the cement industry the ball mill was really an epochmaking breakthrough as for almost 80 years it was the predominant mill for grinding of raw materials and coal, and still today is the most used mill for cement grinding. Cement kilns are used for the pyroprocessing stage of manufacture of portland and other types of hydraulic cement, in which calcium carbonate reacts with silicabearing minerals to form a mixture of calcium silicates. Manufacture, chemical composition, heat of hydration. Blended portland cements blended cement, as defined in astm c 595, is a mixture of portland cement and blast furnace slag bfs or a mixture of portland cement and a pozzolan most.

Drives, geared motors,control systems and have been dealing with comp. Although their concepts are very similar, they are not discussed here. Due to their low energy consumption in comparison with conventional horizontal mills, it is preferable to use vertical mills that employ enormous drives. Marks3 1abb switzerland ltd segelhofstrasse 9 p badendaetwill, switzerland, ch5401 corresponding author. Photographs of a glass ended laboratory ball mill show action of ball mass within the mill. Gearless drives are especially suited for use in cement and ore mills, conveyer belt systems as well as for mills, ship drives and windpower facilities. Selecting inching drives for mill and kiln applications.

Raw material dryinggrinding cement plant optimization. The mill consistently uses five to ten percent less power than other cement vertical roller mills, and in comparison with traditional ball mill operations, the energy requirements for the ok cement mill is 3045 percent lower for cement grinding and 4050 percent lower for slag. We are planning to put up a new cement grinding plant using vertical roller mill300350 tph and before implementing the project, we would like to. Working principle of ball mill ball cement milling. Vertical roller mill homogenization silo fine grinding performed by vertical mills mills grinding raw materials to very fine grain are used at various stages in cement production. Failure of the pinion from the drive of a cement mill. Drive technology for the cement industry flender gmbh a. The following seven pages describe four typical applications and present the reasons why electrical drives were chosen. The gmd is also known as wraparound motor or ringmotor. A complete solution including products such as motors, drives and cubicles, all driven through the abb ability expert optimizer software.

Cement mill process flow chart cement manufacturing. Filling degree by the free height method 2 visible angle method. A cement mill drive that was manufactured in the speed reducer department of the falk corporation. Thai cement producer to increase capacity tpi polene has awarded siemens with a contract for a new clinker production line in saraburi, thailand. Application of electrical drives in cement industry includes function and requirements of. Often used in large mills in the cement and mining industry, these. The installation topology allows it to be deployed both in abbs 800xa control system and in thirdparty control systems, making it applicable to any type of control system setup. As enterprise software, pdf printer driver is extremely inexpensive, but individuals might balk at paying for functionality they dont need, especially with many free alternatives available. This page and the linked pages below summarize the cement manufacturing process from the perspective of the individual components of a cement plant the kiln, the cement mill etc for information on materials, including reactions in the kiln, see the clinker pages. The emission limit values shall be set by national authorities based on best available techniques for the relevant industrial sector. This fact should be carefully kept in mind when determining the capacity of a steel head ballrod mill, as this unit can carry a greater. Ball mill drives dual drives, twin motor drives high speed slip ring induction motors, liquid rheostat, slip compensation resistance and gearbox low speed low torque synchronous motors with air or hydraulic clutches.

Often used in large mills in the cement and mining industry, these motors were driven by lci variablefrequency drives vfds or used with direct start with a. Cement manufacturing brief description of a cement mill. The aim was to offer a lowcost, efficient and easy to assemble gmd that embodied 40 years of mill drive experience in the mining industry. Fe2o3 c4af 58 aluminoferrite tricalcium aluminate 3 cao. The gmd is a drive system without any gear where the transmission of the torque between the motor and the mill is done through the magnetic field in the air gap between the motor stator and the motor rotor. Auxiliary or maintenance drives are available in accordance with your requirements. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other plant equipment and motor characteristics. Engineering and production since introducing with great success in 1966 the technology of mill gear units to the cement industry we have sold over 6000 maag gear units and girth gears.

Pdf grinding mill drives play an important role in the mining industry. Cement mill drive photograph wisconsin historical society. Ball mill ball mills with high efficiency separators have been used for raw material and cement grinding in cement plants all these years. Our modern vertical roller mill takes you further flsmidth. The understanding cement glossary contains over 100 definitions of words used in cement science. Gearless mill drives are a well established solution for grinding applications in the. Click here or on the image to sign up for cembytes. In addition, savings in the precalciner, kilncooler area, the optimisation of cement mill operations can provide additional specific energy consumption savings of up to 5%.

In 1988, siemens provided the first gearless drives for semi. Welcome to this open and free electrical engineering study site. In the first few years, the gmd was only used in the cement industry. Ball mill drives single motor drives ring gear and pinion with lowspeed synchronous motor and air clutch ring gear and pinion with highspeed motor, gearbox and fluid coupling. In fact the customer bought already another 100% interchangeable menzel motor. Manufacture of portland cement university of technology. Cement in the most general sense of the word, a cement is a binder, a substance that sets and hardens independently, and can bind other materials together.

The pinion from the drive of the cement mill was failed. In addition, the new trend is to have the ball mills. An ebook reader can be a software application for use on a computer such as microsofts free reader application, or a booksized computer this is used solely as a reading device such as nuvomedias rocket ebook. It is based on the number of plates visible inside the mill, knowing the total number of plates per. Bevelhelical and bevelepicyclic roller mill drive designs have been supplied by philadelphia gear for roller mill applications, and primary motor driven parallel shaft reducers which drive final reduction pinions and girth gear sets for grindingball. Ball mill is a cylinder rotating at about 7080% of critical speed on two trunnions in white metal bearings or slide shoe bearings for large capacity mills. Training for pioneer cement operation clinker quality clinker component sio2 22.

In cement plants, variable speed drives are used to control the rotational. Ok cement mill the most energy efficient mill for cement. In the cement production line, we use cement crusher for cement crushing process, then we need cement mill for fine grinding stage. While larger mill drives come in four or even five segments that need timeconsuming interconnection on site, the. Optimizing cement mill using apc techniques at votorantim. Pdf technical evaluation and practical experience of highpower. Prepared by hatsachai prahanph siam cement taluang co. The auxiliary drive is a cost effective drive used during buildup welding on the mill or for convenient positioning of the mill during maintenance. For constructional purposes, the meaning of the term cement is restricted to the bonding materials used with stones, sand, bricks, building stones, etc. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This includes all rotating mills with heavy grinding media loads. No annoying ads, no download limits, enjoy it and dont forget to bookmark and share the love.

Mechanical drives for cement and materials processing industry. Cement mill,cement mills,cement ball mill,cement grinding. Due to its highly effective drying performance, the ok mill is the natural choice for grinding blended cements with one or more wet components. Grinding and milling systems course a sixweek course designed to take students through the complete cycle of raw material grinding and preparation, clinker grinding, milling and separation cycles.

Get cement mill at best price with product specifications. Also, reports show a certification statement and are signed by the cement plants quality control manager. This article focuses on ball and rod mills excluding sag and ag mills. Motor bearings, not just a piece of metal english pdf article ringgeared mill drives flexible and smooth operation brochure english pdf brochure collaborative services for grinding solutions excellence in support is never far away english pdf brochure abb in cement english pdf brochure. The main types are described and illustrated on these pages. Pdf synchronous motors continue to be a viable alternative to induction. Cement used in construction is characterized as hydraulic or nonhydraulic. Equivalent values of drive parameters, components of low torques, nature and classification of load torques, calculation of time and energy loss in. Selection of ac induction motors for cement plant applications.

It tackles the complexity of cement processes, minimizes the effect of variability in feed and fuel and then drives the process in the direction that makes you money. Usually this certificate must be included in submittal documents to show that the cement conforms to the requirements of applicable specifications, such as. Optimizing operations and minimizing costs at medcem cement. Several drives in cement mill process are raw mill drives, cement mill drives, kiln drives, crusher drives, waste gas fan drives and compressor drives. This is essentially a large rotating drum containing grinding media normally steel balls. Industrial drives and applications electricalnotesengine. The aim of this document is to provide background information on the cement industry and cement manufacturing technology, and to determine best available techniques for the installations for production of cement.

Rolling mill drives, cement mill drives, paper mill dries and textile mill drives. Working principle of ball mill ball cement milling machinery. The inching drive components include a prime mover, speed reducer, and a connection. The main types are described and illustrated on these. Condition based monitoring kiln and ball mill girth gear abstract this practice describes a twopart new proposed standard for electromagnetic methods for preparation and examination of gear teeth in the cement sector on kiln and ball mill girth gear drives including pinions particularly on the addendum dedendum and root areas. This drive was later purchased by fuller company and used by hudson cement company of kingston, new york. No wear was found at the cage, outlet head and air intake spiral. The first is to reduce the speed of the electric motor to the selected mill speed and to transmit the torque created by the motor. Portland cement is a hydraulic cementcapable of setting, hardening and remains stable under water. The failure was only located on one side of the pinion. This enables girth gear load ratings that are unachievable for conventional drives.

As leading technical developer of drive solutions for the cement and minerals industries we remain focused on our customers productivity. Ball mills and vertical milling technologies will all be included with operator training on improved grinding techniques, cost saving strategies. The ball mill is used to grind many kinds of mine and other materials, or to select the mine. The concept to drive the mill this way is relatively simple using the mill body as motor rotor and mounting the poles there. Setting and curing and cement manufacturing process, process. In the chemical and process industries, grinding is an important step in preparing raw materials for subsequent treatment. The mounting procedure takes less time than ever before while the foot can be directly cast to the base concrete without separate steel structures for adjustment. Join the community and register for a free guest account to post a reply. As of today we have 110,518,197 ebooks for you to download for free. The auxiliary drive is fitted behind the electric motor or on the opposite side of the gear unit. Cement and glass makers need integrated process control systems that can improve plantwide efficiency and productivity. English pdf brochure ringgeared mill drives flexible and smooth operation brochure english pdf brochure. Abb drives in cement medium voltage drives for reduced energy.