Specification of ball mill liner crusher mills, cone. Pulpmax composite mill liners are highperformance lightweight mill liners uniquely constructed with a rubber, ceramic matrix, and carefully selected highhardness steel inserts. We are china mill liners suppliers and provide you good quality ball mill liners,cement rubber liner for wet ball mill detailed info for stone different specifications type. Outotec can also be commissioned for project work to optimize mill operation, optimize the sequencing of reline schedules, redesign liners, calibrate load cells, perform a complete reline service for grinding mills, and much more.
What are the factors influencing the liner wear of a ball mill. In grate ball mill work there are no discharge head liners. Using add reply allows you to attach images or pdf files and provide a. Vulco compounds are produced for use across ag, sag, ball, rod and scrubber mills.
Examples of capital equipment in the mine adapters, cclamps and pins on shovel buckets and loaders. An overview of the selection and design of mill liners was published by powell et al 2006, providing a reference source on mill liners, however no comprehensive technical manual or training is. Ball mill liners for mineral beneficiation polycorp has a long successful heritage in the mining industry and is recognized as an international supplier of premium mill liners polycorp has installed rubber liners in ball mills up to 24ft73m in diameter and has supplied mill liners for more than 300 mills worldwide custom designed mill liners. Find details of companies offering ball mill liners at best price. Ball mill design pdfon this product details page, you can find comprehensive and indepth ball mill design pdf descriptions. A ball mill, a type of grinder, is a cylindrical device used in grinding or mixing materials like ores, chemicals, ceramic raw materials and paints. This was applied to cadia hill gold mine through evaluation of their. A slightly inclined or horizontal rotating cylinder is partially filled with balls, usually stone or metal, which grind material to the necessary fineness by friction and impact with the tumbling balls. Ball mill liners mill liners cement mill liners steel mill liners white iron castings wearresistant castings ni hard liners crusher wear parts alloy steel castings heat resistant castings grinding media sag mill liners ball mill lining grinding mill liners mill lining system mill liner design and installation. Pdf selection and design of mill liners researchgate. Modeling and process control article pdf available in cybernetics and information technologies 122 january 2012 with 4,731 reads how we measure reads.
Mill throughput drops markedly when new liners are installed. Based on study of the existing mill operating conditions from maintenance and process point of view, aiae designs mining liners for ball mills of different stage. Three phenomenon of ball mill liner failurehongji group. Ball mill liners in working conditions, by grinding and material impact on itself, rolling, sliding effect, affected by temperature changes, causing the surface material liner wear, which is inevitable. Building materials equipment ball mill liner replacement. Indeed, as explained previously, at a mill stop, the measurement of ball charge filling degree could be undertaken and will provide the static media charge angle. This machine is widely applied to the industries of electronic material, magnetic material, biological medicine, ceramic glaze, metal powder, nonmetallic minerals, new materials and etc. Highlow double wave ball mill liners these are a refinement of the wave liner, figure 5 this was applied to cadia hill gold mine through evaluation of their existing wear profile and wear rate, and provided a more consistent wear profile through the liners working life. Complete mill weight cost life costannum liner kg r day r vgrid 145 368 4 192500 lifterbar 119 302 67 315900 total 508400 100mmflatgrid 192 488 85 402300 125mmflatgrid 240 610 665 64300 lifterbar 2 335 192 122300 total 186600 analysis oftheresults after6monthsofmonitoring, itcanbepredictedthat lifterbarsundertheseconditions willlast192dayson.
The number of rows of lifter depends upon the diameter and type of the mill. Effect of ball and feed particle size distribution on the. Trelleborg then went on to patent the first mill linings in 1953 and after thorough tests applied for. In grinding, selecting calculate the correct or optimum ball size that allows for the best and optimumideal or target grind size to be achieved by your ball mill is an important thing for a mineral processing engineer aka metallurgist to do. Our elastomer laboratory experts are continually developing new compounds for improved mill liner performance and wear life. Measurement of the liner wear in the mill of an ore dressing plant is one of the critical parameters in the context of. The selection design and application of mill liners for. The understanding of the working conditions is not comprehensive, and the understanding is not profound. Using composite liners also cuts the weight of the liners to about 50 percent of standard steel cast liners, making it possible to work with a higher ball charge level without. We use cookies to improve your experience on our website. Multiplemodel control strategy of a one chamber ball mill one chamber.
Tribological processes in a ball mill for ordinary. Head liners are of the segmental type constructed of manganese steel, chrome molybdenum, or nihard and are designed to pass easily through the manhole opening or discharge opening in the case of rod mills. There are three types of grinding media that are commonly used in ball mills. For wet grinding mill, the liner is also subject to water erosion, wet mill liners faster than dry mill liner abrasion. Options include impact resistant alloy inserts of cast and rolled metals for the most arduous grinding applications, or ceramic and rubber mill discharge designs to prevent grate blinding caused by pegging. Ieee xplore abstract ball mill drive motor choices. Adequate caution was taken in order to ensure that the sieves were not clogged and the standard sieving time of 20 min used, was enough to break any agglomerates of fines that may have formed. These, which have the worlds largest volume, are solely ag mills, i. Ball milling pdf crusher mills, cone crusher, jaw crushers. Summary the ball mill is designed to grind materials by turning the cylindrical shell with grinding medium e. For ball mill work ribs are cast with the feed head liners to deflect the ball mass and minimize wear on the headliner itself. The ball mill, liners and grinding media employed were made from stainless steel.
Was generally used for mill liners ag, sag and ball prior to the movement to higher carbon content steels. Pdf friction and wear of liner and grinding ball in iron ore ball mill. The composite liners are thinner than steel cast liners, and thinner liners result in a larger volume inside the mill. The selection and design of mill liners professor malcolm powell 1 day course in conjunction with imec14 san luis potosi, mexico, 21 september 2014 based on 30 years of experience in research and consulting in mill liners, prof powell will present insights into the basis of selection of mill liners for sag and ball mills. Because the structure of ball mills is simple and it is easy to operate, and so they are widely used.
Autogenous mill liners, rod and ball mill liners, and feed and discharge end liners bowl, concave, and mantle liners for both the coarse and fine crusher chute, bin, and dump pocket liners bar, steel plate, or nihard classifier wear plates crusher spider caps, rim liners, lower hub lin. The media balls are wear part,if worn,you can change them. Ball mill improvements maintaining grinding efficiency over liners service life time. Mill shell liners for minerals industry aia engineering ltd. D is the diameter inside the mill liners and le is the effective length of the mill.
Ball mills rotate around a horizontal axis, partially filled with the material to be ground plus the grinding medium. Design of rubber liner e liner, apart from protecting the steel shell of the mill from impact and abrasion. Calculate and select ball mill ball size for optimum grinding. The two main functions of a mill liner consist in protecting the mill shell against wear and in transmitting. Trelleborg rubber mill liners trelleborg introduced wear resistant rubber to ball mills in the 1920s, with the first installation experiment carried out in the united states in a 4 x 20 ball mill, at the nipissing mine. Ball mill liners for mineral beneficiation polycorp has a long ball mill steel shell the liner imparts motion into the ball charge careful intelligent liner design can help to improve the operation and performance of grinding mills polycorp ball mill liners are designed and arranged so. Often, the ball used in ball mills is oversize just in case. Procedure for replacement of ball mill shell liner plates. A comparison of wear rates of ball mill grinding media. Pdf dramatic shortcomings of mill liner designs, especially of large. As with grinding balls local economics and ultimately operating costs determine the best design and material to use. A ball mill also known as pebble mill or tumbling mill is a milling machine that consists of a hallow cylinder containing balls.
The ibolt features a light indicator that is configured such that when a set liner wear point is reached in the bolt head inside the mill, a fixed or flashing led light embedded in the thread end of the bolt, outside of the running mill, is activated for up to 60 hours before the battery is depleted. Ball mill liners for mineral beneficiation polycorp. Design method of ball mill by sumitomo chemical co. Designed for a number of minerals processing applications, they are customisable to fit the specifications of your sag or ball mill. Above the arctic circle in sweden, boliden has just installed two 38 diameter mills with an astonishing length of 45 each, at its aitik36 project. We want to create our own design for liner for mill ball and sag but we dont have. In industrial applications, the inner surface of the mill is lined with mill liners protecting the steel body of the mill and incorporating mill lifters which help to raise the content of the mill to greater heights before it drops and cascades down 36. At bougainville the single stage ball mills gave best performance at or near the end. This transfer is a function of the friction characteristics of the charge sliding on. Ball mill grinding and beneficiation process pdf files.
Hence, optimum selection of the lining material and its design is important for liner life nd proper grinding efficiency. The discharge grates and grate assembly replace these parts. Well, this safety factor can cost you much in recovery andor mill liner wear and. It is an immense pleasure of kedar rubber products to introduce itself as a distinguished manufacturer, exporter and supplier of optimum quality ball mill rubber liner, etc. Ball mill design pdf, view ball mill design pdf, zhongyang.
Wear curves for lifters and plates over two different life cycles feed end of sag mill. Decision support models for the maintenance and design of mill. The selection design and application of mill liners for large wet. The intelligent software tracks and forecasts wear on your shell, discharge and feed end liners, providing accurate information on mill charge and a wide range of metallurgical parameters. Tower mills, often called vertical mills, stirred mills or regrind mills, are a more efficient means of grinding material at smaller particle sizes, and can be used after ball mills in a. History is that mill liners have evolved over time liner design has a significant effect on mill performance and liner life engineering approaches have highlighted mill performance with mill modelling and the use of improved materials liner design,with the advent of large diameter sag mills, the issues of. Trelleborg has a wide range of rubber lifter bars and plates for ball mills, rod mills and drum. Wear curves for lifters and plates over two different life cycles. Liners in ball mill liner roll ball mill lab ball millslab powder equipment liner roll ball mill model no qm50l brand tencan applications this machine is widely applied to the industries of electronic material magnetic material biological medicine ceramic glaze metal powder nonmetallic minerals new materials and etc. Operating principles, components, uses, advantages and. Ball mills normally operate with an approximate ball charge of 30%.
Measurement of the liner wear in the mill of an ore dressing plant is one of the critical parameters in the context of mill. These products are developed using variable polymers and rubbers, in various specifications, drawing and samples as demanded by the patrons. The time has come to rethink the approach to mill drive motors because of the growth in size of newer ball mills, the starting torque restrictions of some of the newer mill drive configurations, and the softness of some utility. Boltless ball mill liners grinding mill power plant ball mill parts industry grid cement mill liners wear resistance with zgcr5mo hardness ak515j high abrasion steel mill liners standard as 2027 crmo 15 3. Pdf a comparison of wear rates of ball mill grinding media. The wear of mill liners affects the production performance of the mining mill. The initial set of liners is rarely the final design selected. Nov 18, 2008 summary the ball mill is designed to grind materials by turning the cylindrical shell with grinding medium e.
Pdf ppt doc grinding tests have been performed in a pilotscale ball mill. Mill liner design and installation good quality ball mill liners iron ball mill liners for high abrasion mill liner design and installation with hrc56 a. Ball mill rubber liner manufacturer,rubber mill liner. The balls which could be of different diameter occupy 30 50% of the mill volume and its size depends on the feed and mill size.
Furthermore, the ball mill of a large capacity has been available to a very extensive range of applications in both dry and wet 14. Highlow double wave ball mill liners these are a refinement of the wave liner, figure 5. Options include impact resistant alloy inserts of cast and rolled metals for the most arduous grinding applications, or ceramic and rubber mill discharge designs to prevent grate. Ball mill liners on sales quality ball mill liners supplier. Pdf to understand the friction and wear of working mediums in iron ore ball mills, experiments were conducted using the ball cratering. A ball mill is one kind of grinding machine, and it is a device in which media balls and solid materials the materials to be ground are placed in a container. Ball mill liners from multotec use specially formulated rubber and composite. Ball mill liner is to protect the cylinder shell from the direct impact and friction of the grinding media and material, and also can adjust the grinding media motion with different liner form. This type of mill uses the same principle as a vsi crusher tower mill. Jun 19, 2019 the mill liners is not wearresistant and has a short service life. Evaluation of abrasive wear measurement devices of mill liners. Metallurgical contentoptimize ball mill liner replacementlorain shell linersmill head linersmill liner boltseffect of liner design on mill performance there are many different designs and styles of ball mill liners. For ball mill work ribs are cast with the feed head liners to deflect the ball mass and minimize wear on the headliner.
94 1593 550 427 1393 266 667 494 882 262 844 1094 1329 462 1586 1261 898 479 1337 435 1032 1479 539 158 1408 1072 1278 1183 57 349 195 15 1323 1260 1102 1140 74 504 308 950 460 1449 1327 1078