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wear parts of ball mill liners

ball mill spares | ball mill parts | handy

ball mill spares | ball mill parts | handy

Ball mill spare parts such as ball mill liners, grinding balls, intermediate diaphragms, etc. are essential wear parts used in the ball grinding mills for fine grinding. Casting parts is a specialized wear parts manufacturer from China. It is proud to manufacture all kinds of wear parts for ball mills. If you need ball mill parts, just send us samples or drawings, based on which we can make the desired products for you to match your applications.

The grinding mill liners from Casting parts are manufactured from high quality alloy steel or high chrome iron. From feed head to discharge end, the shell plate liners are specially designed for optimization of mill performance and perfect fit with the mill.

The essential ball mill components can separate the grinding media and keep the sizes of grinding media gradually reducing from coarse grinding chamber to fine grinding chamber. This makes sure that large grinding balls grind large materials and small grinding balls grind small materials.

mill liners - metso outotec

mill liners - metso outotec

A mill lining is a customized wear part. Identifying the appropriate type of lining and design is vital for optimizing mill throughput and total grinding costs, including costs for energy, grinding media and maintenance. Furthermore, the design must be constantly optimized to meet your needs. We work closely with our customers and carefully follow their process to make sure the lining we supply is always optimized for current operating conditions.Metso Outotec offers mill linings with materials and designs optimized for each specific application. We can design and supply mill linings for all types of mills - for Metso Outotec mills as well as for competitor mills - and for all parts of the mill. Our wide product range, innovations, knowledge and experience makes us unique. Our approach to lining design is focused on grinding performance, mill uptime and safety.

At Metso Outotec, cooperation with our customers and availability to offer supportand service are of key importance.We have local support close to our customers, several expertise hubs as well as research facilities focused on wear parts development. Metso Outotec's global laboratory network offers unmatched testing and material development. Our wear parts are manufactured in Metso Outotec's global factory network, utilizing the latest technologies and adhering to stringent quality standards. Today we have eleven production units focusing on rubber and Poly-Met wear parts and five foundries for metallic wear parts.

Metso Outotec is widely recognized as a technology leader in mill manufacturing, which makes us much more than a service and wear parts supplier we are true grinding experts. We know the functional parameters, mechanics, kinematics and forces the mill is subjected to in operation. Thinking long term already when buying a mill provides greater opportunities to achieve lower maintenance and operating costs. This, in combination with knowledge about your current operation conditions and targets, is crucial when designing a mill lining.

Developing new materials and solutions together with our customers is at the heart of what we do. By choosing Metso Outotec, you gain access to the latest innovations and can participate in the process of creating them.We pioneered the use of rubber linings and invented Poly-Met, Megaliner and Orebed mill linings. New products are constantly being developed to enhance our customers ever more advancing processes. Our recent innovations include wear reading solutions, Megaliner for heads, Liner Positioning System upgrade, digitalization etc.

By working with a partner who understands the variables affecting grinding performance, you have a great opportunity to maximize mill performance and availability. We are constantly working to optimize your mill lining design according to your targets and current conditions. Our simulation software allows us to predict the performance of the customized lining extremely accurately, which ensures that we deliver the gains we promise. With Metso Outotec, you can be sure that your mill lining is always designed according to your targets, ore and grinding process.

Finding the balance between grinding and discharging requires in-depth knowledge of the grinding process. It is often challenging, as efficient grinding is dependent on many separate parts and parameters.Metso Outotec designs mill linings for all parts of the mill; shell lining, head lining, discharge system and trommel. We can offer a holistic approach to your whole grinding circuit, and we look at how your different wear parts function together

As part of a system solution, the head lining is designed with consideration to the shell lining design. All components must be in balance to minimize the number of maintenance stops. We try to keep the number of individual parts to a minimum, and to ensure that parts do not interfere with each other during installation. Liners that are most subject to wear are made more robust, and whenever possible these high wear parts are designed to be independently replaceable.

The shell lining has a major influence on grinding efficiency. It transforms the mill rotation into charge motion and both profile and spacing must be carefully selected to suit each specific mill. When designing a shell lining, Metso considers the type of grinding, mill size and speed, maintenance schedules, safety, impact levels, efficient use of materials, and many other parameters.

Metsos wear-resistant rubber-covered or cast dischargers come in two general designs radial and curved. The larger the mill, the longer the distance the material must travel before being discharged into the trunnion. A curved discharger design will initiate a flow towards the center of the mill at an earlier stage and ensure that the discharger pan is emptied and ready to be refilled during the next pass through the charge. Prompt removal of material and less backflow will allow the energy to be more efficiently utilized for grinding fresh ore. As less material is recirculated, wear life increases. In addition, increased flow can also contribute to increased throughput and decreased power consumption.

Metso trunnion liners are custom-made to protect your mill trunnions from internal wear. Fit is critical, and our trunnion liners can be made to almost any size or shape. Typical design features include internal spirals or dams to control material flow, flanges for the mounting of trommel screens, inclusion of threaded holes for jacking screws, inspection ports, etc. Metso trunnion liners are grouped into three categories; One-Piece, Replaceable Sleeve and Bolted Wear Elements.

Mill trommels, whether used for sizing or scalping, play a vital role in your grinding circuit. Metsos robust but light-weight trommel frames consist of carefully selected welded profiles that are covered in a protective layer of wear resistant rubber or polyurethane. Adapting flanges, if required are available to suit the design of virtually any trunnion or trunnion liner interface. There are two main types of screen panels modular and customized. The modular trommel panel with snap-on attachment comes in a standard size of 305 x 610 mm. Installation and replacement of the snap-on screen panels is easily accomplished and results in minimal if any impact on mill availability.

As part of a system solution, the head lining is designed with consideration to the shell lining design. All components must be in balance to minimize the number of maintenance stops. We try to keep the number of individual parts to a minimum, and to ensure that parts do not interfere with each other during installation. Liners that are most subject to wear are made more robust, and whenever possible these high wear parts are designed to be independently replaceable.

The shell lining has a major influence on grinding efficiency. It transforms the mill rotation into charge motion and both profile and spacing must be carefully selected to suit each specific mill. When designing a shell lining, Metso considers the type of grinding, mill size and speed, maintenance schedules, safety, impact levels, efficient use of materials, and many other parameters.

Metsos wear-resistant rubber-covered or cast dischargers come in two general designs radial and curved. The larger the mill, the longer the distance the material must travel before being discharged into the trunnion. A curved discharger design will initiate a flow towards the center of the mill at an earlier stage and ensure that the discharger pan is emptied and ready to be refilled during the next pass through the charge. Prompt removal of material and less backflow will allow the energy to be more efficiently utilized for grinding fresh ore. As less material is recirculated, wear life increases. In addition, increased flow can also contribute to increased throughput and decreased power consumption.

Metso trunnion liners are custom-made to protect your mill trunnions from internal wear. Fit is critical, and our trunnion liners can be made to almost any size or shape. Typical design features include internal spirals or dams to control material flow, flanges for the mounting of trommel screens, inclusion of threaded holes for jacking screws, inspection ports, etc. Metso trunnion liners are grouped into three categories; One-Piece, Replaceable Sleeve and Bolted Wear Elements.

Mill trommels, whether used for sizing or scalping, play a vital role in your grinding circuit. Metsos robust but light-weight trommel frames consist of carefully selected welded profiles that are covered in a protective layer of wear resistant rubber or polyurethane. Adapting flanges, if required are available to suit the design of virtually any trunnion or trunnion liner interface. There are two main types of screen panels modular and customized. The modular trommel panel with snap-on attachment comes in a standard size of 305 x 610 mm. Installation and replacement of the snap-on screen panels is easily accomplished and results in minimal if any impact on mill availability.

There are two types of stirred media mills: Vertimills and Stirred Media Detritors. In a stirred media mill, the mill body is static and the charge motion is created by an agitator such as a rotating spiral or impeller.We provide both original body liners and spiral/impeller liners designed as a system for each of the mill sizes of our extensive range of stirred media mills. Our product range includes all the consumables in your mill e.g. body liners, screw liners, impeller arms, retaining screens, and attachment hardware.

More than a liningWhen buying a mill lining from Metso Outotec, you get more than just a wear part. We always do a pre-study and design the lining based on your conditions and targets. Wear and performance monitoring are regularly done to better understand your grinding process and to optimize the lining accordingly. Technical support is offered, and we arrange product and process trainings as well as technical development meetings for our loyal customers.

Installation and relineOur experienced engineers oversee the safe and timely installation of Metso Outotec-supplied parts. Our experts adhere to the most stringent safety standards and are highly trained in OEM workmanship, allowing for a high-quality installation. If necessary, Metso Outotec can also guarantee the amount of downtime needed to perform wear part changeouts. Read more on Maintenance and repairs.

Grinding circuit optimizationMetso Outotec process experts help in solving complex operational issues using analytical techniques, laboratory testing, and advanced control systems. Whether you need to optimize a piece of equipment, a circuit, or your entire plant, we have the tools and technology to help you make it happen. Read more on Process optimization and controls.

Life Cycle ServicesMetso Outotec's pre-packaged solutions are designed to assist you in meeting your business goals, from start-up to shutdown to end-of-life. We can support you on a specific activity or over a larger scope, combining elements from our large portfolio of services with unique commercial models. Read more on Life Cycle Services.

ball mill liner design

ball mill liner design

There are many different designs and styles of ball mill liners. As with grinding balls local economics and ultimately operating costs determine the best design and material to use. The initial set of liners is rarely the final design selected. Based upon individual experience, mill superintendents develop preferences for liner designs. The following is given as a guideline for the initial set of liners.

For 60 mm (2.5) and smaller top size balls for cast metal liners use double wave liners with the number of lifters to the circle approximately 13.1 D in meters (for D in feet, divide 13.1 D by 3.3). Wave height above the liners from1.5 to 2 times the liner thickness. Rubber liners of the integral molded design follow the cast metal design. If using the replaceable lifter bar design in either metal or rubber the number of lifters should be about 3.3 D in meters (for D in feet* divide 3.3 D by 3.3) with the lifter height above the liners about twice the liner thickness. The use of double wave liners, particularly when using 50 mm (2) or larger balls, may show a loss of 5% or so in the mill power draw until the waves wear in and the balls cannest between the lifters.

When liners, and double wave liners in particular, wear with circumferential grooves, slipping of the charge is indicated, and this warns of accelerated wear. When the top size ball is smaller than 50mm (2.5) and mill speed is less than 72% of critical wear resistant cast irons can be used. For other conditions alloyed cast steel is recommended.Rubber liners are well suited to this same area and not onlyreduce operating costs but can reduce noise levels.

Single wave liners are recommended for larger size balls (50mm/2.5 and larger). The number of the lifters to the circle equals approximately 6.6 D in meters (for D in feet, divide 6.6 D by 3.3). The liners are from 50 to 65 mm thick (2 to 2.5) with the waves from 60 to 75 mm (2.5 to 3) above the liners. The replaceable lifter bar design madeof either metal or rubber in about the same design proportions can be used. There could be a loss in power with rubber particularly if the mill speed is faster than about 72% of critical speed, and the ball size is larger than 75 mm. Because of the impacting from the large balls, single wave liners for ball mills are usually made from alloyed steels or special wear-resistant alloyed cast irons. Because of the difficulty of balancing growth and wear with work hardening manganese steel is used infrequently and then with extreme care to allow for growth.

When a grate discharge is used the grates and wear platesare normally perpendicular to the mill axis while the discharge pans conform to the slope of the mill head. The grates and wear plates are normally made from alloy wear resistant cast steel or rubber. They are ribbed to prevent racing and excessive wear. The dischargers and pans are generally made from either wear resistant cast ironor rubber, or wear resistant fabricated steel.Slot plugging can be a problem in grate discharge mills. Whether the grates are made of metal or rubber the slots should have ample relief tapered toward the discharge side. Total angles 7 to 10 degrees (3.5 to 5 degrees per side) are commonly used. Metal grates often havea small lead-in pocket or recess which can fill in with peened metal rather than have the slot peen shut. With the proper combination of metal internals and rubber surfaces, rubber grates have flexibility that tend to make them self cleaning and yet not fail due to flexing.

Except when using rubber liners, the mill surfaces are covered with a protective rubber or plastic material toprotect the surfaces from pulp racing and corrosion. This is done in wet grinding mills. Since dry grinding mills get hot due to heat from grinding generally rubber liners and rubber materials cannot be used.

Shell liners may be furnished of various materials and of several designs. In each case the material used is the best obtainable, resulting in the lowest cost per ton of ore ground. The liner contours are selected for the specific grinding application and take into consideration liner wear, scrap loss, and mill capacity.

Liners cast of Manganese Steel, Ni-Hard, Chrome-moly, or other similar materials may be of the step type, block type, wave type, or the two-piece plate and lifter construction. These are illustrated on the right. During the past years of building ball Mills various other shapes of liners have been tried, such as the pocket type, spiral liners, etc.; in most cases it is found that these special shapes and designs are not justifiable from the standpoint of economics. They involve additional costs which are not generally recovered from an increased efficiency in milling operation.

Lorain Shell Liners consist of high carbon rolled steel plates accurately formed to the mill shell radius. These are held in place by rolled alloy steel heat treated lift bars. This type liner is carefully engineered for the specific grinding application. Variations in lift bar design and liner plate thickness provide this flexibility of design for application.

All shell liners designed for ball mill operations are of such size and shape that they will easily pass through the manhole opening to facilitate relining operations. In rod mill work the design is such that they will easily pass through the large ball open end discharge trunnion.

Where cast liners are used, and especially in rod mill applications, we furnish rubber shell liner backing to help cushion the impact effect of the media within the mill and prevent pulp racing. With the Lorain type of liner such shell liner backing is not required. For special applications where severe corrosive conditions exist a shell liner of special alloys can be furnished and also the interior surface of the shell can be treated to protect such parts from the corrosive conditions.

Head liners are of the segmental type constructed of Manganese Steel, Chrome molybdenum, or Ni-Hard and are designed to pass easily through the manhole opening or discharge opening in the case of rod mills. For ball mill work ribs are cast with the feed head liners to deflect the ball mass and minimize wear on the headliner itself.

Where cast liners are used shell liner bolts and head liner bolts are made of forged steel with an oval head to prevent turning and loosening within the liners. These are held in place with two hex nuts and a cut washer. For wet grinding applications special waterproof washers can be furnished.

Theeffect of liner design upon mill performance appears to have received little attention. Clearly, the main function of the liner is to form a removable surface to the null body, which may be replaced when seriously worn.

It is also clear however, that the metal plates which serve this purpose may have a surface which ranges from smooth in one which carries an intricate pattern of raised bars or sunken depressions. The merits of the various types do not appear, however, to have been studied.

where smooth liners are those which have projections insufficient to give appreciable keying between the liner and the ball charge, whilst lifter liners are those which are so heavily ribbed as to give rise to appreciable interlocking between the balls and the liners.

Various common types of liners are illustrated in Fig. 6.12. Although these liners have various patterns of projections, or depressions, to give an amount of interaction between the liner and the grinding medium, it would be expected that wear would round the edges. It is doubtful whether, after some time in service, the performance of a mill with these liners differs appreciably from that of a mill with a smooth surface. Liners furnished with heavy lifter bars are also sometimes used and in such a case the locking of the ball charge to the shell must be very effective. Nevertheless, although a few vague general statements to the effect that a lifter mill gives a product with different size characteristics to that of a smooth mill have appeared, the point does not appear to have been widely investigated. It is probable, however, that, on the grounds of differences in the size characteristics of the products, there exists no sound reason for the use of lifters in preference to the normal smooth liners.

It is possible that, when a material with a low coefficient of friction is milled, the charge might slip on a smooth mill shell, with consequent loss of grinding capacity, and in such a case the use of lifter bars might well be the solution. It has also been suggested by one of the authors, Rose, that the use of lifter bars might eliminate the surging of the charge sometimes encountered in mill operation.

An entirely different conception of the duty of the mill liner underlies the design of the studded liner developed by Usines Emile Henricot of Count St. Etienne. These liners, illustrated in Fig. 6.12 and Fig. 6.13, consist of comparatively thin plate liners with uniformly spaced studs on the working surface; these studs being integral with the plate. Provided the spaces between the studs are not allowed to become choked with tramp-iron, etc., the studs furnish a good key between the shell and the charge which, it is claimed, leads to a greater power consumption and to improved grinding. Furthermore it would appear that the studs impose a definite geometrical arrangement in the outer layer of balls which, in turn, brings about a closer packing, throughout the ball mass, than obtains with conventional types of liner. This effect would also lead to improved performance. Evidence of this effect of the studs upon the packing of the charge appears in Fig. 6.13b, for the balls are clearly seen to lie in rows in the mill instead of in completely random array.

An incidental merit claimed for these liners is that the high bearing pressure between the balls and the studs of the liners leads to work hardening of the studs; with a consequential reduction of the rate of metal wear.

The Henricot liners, which have been discussed in a paper by Belwinkel, appear to be the only attempt so far made to influence the grinding characteristics of a mill by means of correctly designed liners. It would therefore appear that there is some room for development in this direction.

huihe miningparts co., ltd - grinding media | ball mill liner

huihe miningparts co., ltd - grinding media | ball mill liner

Chromium alloy liners always be made in Chrome-Moly type and High-Chrome type, which are widely used in SAG mills for mine and Ball mills for cement industry. The choice of alloy used for the liners also depends on operating conditions of each mill o...

Huihes foundry also produce varies of casting products for crushers,like jaw plates, mantle&concave, impact plates,blow bars, hammers etc. For mainly famous crushers brands:Metso,Sandvik,Nordberg,Symons,Hazemag,Kleemann,Keestrack,Powerscreen, Terex,...

We offer full range of chromium alloyed grinding balls, size from 8 to 120mm, low and high chromium,balls/cylpebs. hardness from 55 to 65 HRC, different balls selected should be determined by every unique working conditions and processing environment...

Mill liners is used in the steel ball mills/rod mills to protect the body of mills and also designed to lift the balls to assist grinding. It will be designed based on the grinding mechanisms required for the specific mill, determined by mill type,si...

Chromium alloy liners always be made in Chrome-Moly type and High-Chrome type, which are widely used in SAG mills for mine and Ball mills for cement industry. The choice of alloy used for the liners also depends on operating conditions of each mill o...

Huihes foundry also produce varies of casting products for crushers,like jaw plates, mantle&concave, impact plates,blow bars, hammers etc. For mainly famous crushers brands:Metso,Sandvik,Nordberg,Symons,Hazemag,Kleemann,Keestrack,Powerscreen, Terex,...

We offer full range of chromium alloyed grinding balls, size from 8 to 120mm, low and high chromium,balls/cylpebs. hardness from 55 to 65 HRC, different balls selected should be determined by every unique working conditions and processing environment...

Mill liners is used in the steel ball mills/rod mills to protect the body of mills and also designed to lift the balls to assist grinding. It will be designed based on the grinding mechanisms required for the specific mill, determined by mill type,si...

Chromium alloy liners always be made in Chrome-Moly type and High-Chrome type, which are widely used in SAG mills for mine and Ball mills for cement industry. The choice of alloy used for the liners also depends on operating conditions of each mill o...

Huihe Miningparts Co.,ltd is specialized in design, manufacturing of casting wear parts like grinding balls, ball mill liners, crushers etc. Our marketing offices offers regular on-site technical and after-sales services, to meet our customers milling targets by providing grinding solution, milling system adjustment.

Our manufacturing facilities has leading casting techniques and large production capacity, which can enable us to provide specific wear parts materials to satisfy our customers requirements based on their unique processing environment.

qiming machinery | wear parts for mining, quarrying & cement industry

qiming machinery | wear parts for mining, quarrying & cement industry

Qiming Machinery is the leading manganese steel, chromium steel, alloy steel, and heat-resisting steel manufacturer in China. We manufacture replacement wear part castings for impact, abrasion, and high heat applications in mining, crushing, grinding, and shredding, for industrial clients worldwide. No matter which wear parts you are interested in, send us the drawings or sample products, you will get the best products and professional suggestions. Know more+

Qiming Machinery manufactures shredder wear parts, crusher wear parts, mill liners, TIC inserts wear parts, apron feeder pans, and other industries wear parts for ore and aggregate crushers, metal and waste shredders, coal-fired power plants, cement industry, and custom application.

Qiming Machinery manufactures AG mill liner, SAG mill liner, ball mill liner, roll mill liner, and other types of mill liners for all popular brands. Material includes Cr-Mo, manganese, chrome, Ni-hard, and other steel.

Our steel casting foundry services include manganese steel casting, chromium steel casting, alloy steel casting, and carbon steel casting. Casting products of our steel casting foundry span across many industries. On the other hand, customized materials also can be manufactured after checked with our professional engineers.

Qiming Machinery manufactures ASTM A128 standard manganese steel wear parts over 12,000 tons per year, which products include cone crusher liners, jaw crusher liners, mill liner, apron feeder pans, hammer mill hammer, and other wear parts.

Qiming Machinery manufactures ASTM A532M standard chromium steel wear parts over 4,000 tons per year, which products include impact crusher blow bars, impact plates, feed tube, VSI wear parts, mill liners, distributor plate, and other wear parts.

As an alloy steel casting foundry, Qiming Machinery specialized in manufacturing low-alloy steel and high-alloy steel parts. Material includes Cr-Mo alloy steel, 30CrNiMo alloy steel, heat-resistant alloy steel. Products include alloy mill liners, alloy hammer, heat-resistant liners

Qiming Machinery has had cooperation with casting foundries to offer carbon steel (ZG250-700, ZG20SiMn, G20Mn5, ASTM A148, ASTM A488, ASTM A781, ASTM A802) wear parts, which include cone crusher shell, jaw crusher flywheel, pitman, adjustment ring, and other parts.

We have a customer from Australia, who runs MVP450 cone crusher to crush hard stone. However, the original wear parts just can work for around 7 days. This customer wants to prolong this mantle and concave span life. After visiting our foundry, this customer wants us to manufacture TIC insert MVP450 mantle and concave to

Qiming Machinery is a professional cone crusher liner manufacture in China. We had exported more than 12,000 tons of cone crusher liners for our customers. Recently, we get a trail order from Serbia to test our Mn18Cr2 HP300 cone crusher mantle and concave. About the feedback, please check the following communication message: T The messages

We have a Philippines customer who has four crushing lines to crush hard stone. There are 1 set HPT300 crushing lines, 1 set PEW760 crushing line, 1 set HP200 crushing line, and 1 set HP300 crushing line. They had tested many foundries crusher wear parts, however, no products have a long working life. From April

Qiming Machinery is the leading manganese steel, chromium steel, alloy steel, and heat-resisting steel manufacturer in China. We manufacture crusher wear parts, shredder wear parts, mill liners, apron feeder pans, and other wear parts for customers.

step by step guide to replace ball mill liners | qiming machinery

step by step guide to replace ball mill liners | qiming machinery

Ball Mill liners are an extremely efficient variant of mill liners, which is what compels the ball mill liners manufacturers to manufacture them in the first place. If used properly, they may last pretty long. However, at one point or another, we may be obligated to replace the ball liners mill, due for various reasons.

Before installing a ball mill liner initially, we need to understand its working. In other words, we need to understand how long it will work, and if it works efficiently. Furthermore, judging the cost will also be a reasonable thing to do. The culmination of this will lead us to a clearer understanding of how and when to do the replacement job, which will help us make a timely schedule.

In order to ensure efficiency and coordination during the replacement process, we will be needing expert supervision over the process, and laborers and technicians that very well understand the process. If this is not ensured, the replacement procedure will not go smoothly and as a consequence, we may also have an improper replacement.

For efficient and proper removal, you must first clean the mill. You may have pulp accumulated on the ball mill that you need to clean. Furthermore, remove the rubber pad, clean the wall and remove the dust by descaling the cylinder. Once the barrel is fixed, ensure good ventilation so that the replacement process can start.

First, remove the lining screws, then remove the line of the ball by line. It should be ensured that necessary safety precautions are taken because this is the point where the injury is most common to occur. When lifting the ball out, make sure to keep the wire rope and hook into consideration, that they are firmly at their place. Hoisting should also be done carefully.

We have to install the new balls keeping the gaps and time periods into consideration. The spiral on the ball mill liner should be fixed, and the seal and gasket shall be applied carefully, ensuring that there are no leakages. The inner cylinder should be screwed tightly and it should be cemented properly so that it can solidify and culminate the reinstallation process.

The mill liner should be revisited to ensure that all the things had been done properly, and no people or tools were left behind. If so, it can cause a lot of problems and damages, especially the loss of human lives.

The process of replacing these ball liners is very easy but needs to be handled with real care. You can get in touch with Qiming Machinery if you are looking to get any information about Ball Mill liners.

Qiming Machinery is the leading manganese steel, chromium steel, alloy steel, and heat-resisting steel manufacturer in China. We manufacture crusher wear parts, shredder wear parts, mill liners, apron feeder pans, and other wear parts for customers.

ball mill liner function | wear parts for industry | qiming casting

ball mill liner function | wear parts for industry | qiming casting

Ball mill is a major equipment in the production of power plants, cement plants, mines, chemical industry, metallurgy and other industries, the liner is one of the components of the mill, the main role is to protect the cylinder, the cylinder from the grinding body and Material direct impact and friction, help to improve the mill grinding efficiency, increase production and reduce metal consumption. As the liner in the harsh conditions of long-term conditions, maintenance and replacement of considerable volume, not only requires human, material and financial resources, but also a direct impact on productivity.

Ball mill liner plays a major role in protecting the inner wall of the anchor windlass. Different shapes of the ball mill lining plate can improve the grinding effect of the ball mill and improve the working efficiency of the ball mill. 1, flat ball mill liner, the surface smooth, suitable for installation in the fine grinding warehouse. 2, the pressure of the type of ball mill liner, suitable for coarse grinding warehouse, for low speed ball mill. 3, ladder-type ball mill liner, ladder liner is better than the pressure liner, suitable for installation in the coarse grinding warehouse. 4, small corrugated liner crest and pitch are small, suitable for fine grinding and coal mill. 5, end cover liner installed in the grinding head cover or cylinder cover to protect the end cover from wear and tear. 6, ring groove liner in the lining of the T surface for casting a circular groove, after installation to form a circular groove, suitable for multi-warehouse grinding of the first and second positions, dry, wet grinding Machine can be. 7, grading liner, grinding mill for the ideal state should be large particles of material with a large diameter grinding body to impact and crush, that is, in the direction of the mill feed with large diameter grinding body, with the material The direction of the material to the gradual reduction of the grinding body should be sequentially reduced.

Qiming Casting is one of the largest manganese steel, chromium steel, and alloy steel foundry in China. Products include crusher wear parts, Crusher spare parts, mill liners, shredder wear parts, apron feeder pans, and electric rope shovel parts.

ball mill liner | wear parts for industry | qiming casting

ball mill liner | wear parts for industry | qiming casting

Ball mill liners are the main replacement wear parts for ball mills. These liners are manufactured by wear-resistant material and rubble. As a wear-resistant foundry, Qiming Casting manufactures manganese steel, Cr-Mo alloy steel, and Ni-hard steel liners for all kinds of ball mills, which include: single wave liners, modified single wave liners, double wave liners, shell liners, feed head liners, and discharge end liners.

Qiming Casting is Your Foundry for Ball Mill Liners! All Qiming Casting liners are backed by ISO9001:2015 quality control system and are shipped only after meeting our rigorous quality standards. We are committed to meeting your replacement parts needs in a professional and efficient manner. Our Customer Support Department is ready to help you with a quote, to check inventory, or simply answer a technical question. Talk to your Qiming Casting professional today about your specific needs!

It is widely used in cement, silicate products, new building materials, refractories, chemical fertilizer, black and non-ferrous metal mineral processing, glass ceramics and other production industries, dry or wet grinding of various ores, and other grindable materials. Ball mill is suitable for grinding all kinds of ores and other materials. It is widely used in mineral processing, building materials, and the chemical industry. It can be divided into dry grinding and wet grinding. According to the different ways of ore discharge, it can be divided into grid type and overflow type.

The ball mill is composed of a horizontal cylinder, feeding and discharging hollow shaft, grinding head, and other parts. The cylinder is a long cylinder, which is equipped with a grinding body. The cylinder is made of steel plate, which is fixed with the cylinder by steel liners. The grinding body is generally a steel ball, which is loaded into the cylinder according to different diameters and a certain proportion. The grinding body can also be used as a steel section. The grinding material is selected according to the particle size. The material is loaded into the cylinder by the hollow shaft at the feed end of the ball mill. When the cylinder of the ball mill rotates, the grinding body is attached to the liner of the cylinder due to the action of inertia, centrifugal force, and friction, and is taken away by the cylinder. When it is brought to a certain height, it is thrown down due to its own gravity, and the falling grinding body is like a projectile The material in the cylinder will be broken.

The material enters the first bin of the mill evenly through the feeding device through the feeding hollow shaft screw. There are stepped lining plates or corrugated lining plates in the bin, which are filled with various specifications of steel balls. The rotation of the cylinder generates centrifugal force to bring the steel balls to a certain height and then fall down, which has a heavy impact and grinding effect on the material. After rough grinding in the first bin, the material enters the second bin through a single-layer partition board. The bin is inlaid with a flat lining board and steel balls to further grind the material. The powder is discharged through the discharging grate plate to complete the grinding operation.

During the rotation of the cylinder, the grinding body also has the phenomenon of sliding. In the process of sliding, the material is ground. In order to make effective use of the grinding effect, the grinding body cylinder is divided into two sections with a partition board when the material is finely ground with 20 mesh. That is to say, it becomes a double bin. When the material enters the first bin, it is broken by the steel ball. When the material enters the second bin, the steel section has no effect on the material For grinding, the qualified materials are discharged from the hollow spindle at the discharge end. When grinding the materials with small feed particles, such as sand No.2 slag and coarse fly ash, the mill cylinder can be a single bin cylinder mill without partition, and the grinding body can also be made of the steel section.

The raw material is fed into the hollow cylinder through the hollow Journal for grinding. The cylinder is filled with grinding media of various diameters (steel ball, steel bar or gravel, etc.). When the cylinder revolves around the horizontal axis at a certain speed, the medium and raw materials in the cylinder will fall or roll off the inner wall of the cylinder when the gravity is greater than the centrifugal force under the action of centrifugal force and friction, and the ore will be broken due to the impact force. At the same time, in the process of mill rotation, the sliding motion of grinding media also produces a grinding effect on raw materials. The ground material is discharged through the hollow journal.

The maintenance and overhaul of the ball mill is a regular work, the quality of the maintenance work directly affects the operation rate and service life of the ball mill, so how to correctly maintain and overhaul in the process of use is introduced as follows:

The maintenance of the ball mill is regular work, and the quality of maintenance directly affects the operating rate and service life of the ball mill. In order to find out the defects and eliminate the hidden dangers in time to ensure the normal operation of the mill, in addition to daily maintenance, it is necessary to stop grinding regularly (it is recommended to check the important parts such as hollow shaft, main bearing, cylinder, reducer, big and small gear, etc.) carefully and make detailed records. According to the defect situation, the appropriate treatment and arrangement of medium repair and overhaul plan shall be made according to the priority.

Solution 1: It is that some of the liner bolts are not tightened. When the ball mill rotates, the mill liner hits the ball mill barrel. Judge the parts of the mill liner of the ball mill according to the sound, find out the loose bolts and fasten them separately.

The above problems should be dealt with according to their causes. Only if the side clearance of the bearing bush is too small or the bottom contact angle is too large, the grinding cylinder must be jacked up with an oil jack, and the bearing bush should be pulled out from one side of the shaft and scraped separately.

Problem 4: Vibration occurs when the motor speed reducer of the ball mill is started. Solution 4: Adjust the clearance between the two wheels to make the two shafts concentric. Fasten the coupling bolts symmetrically with the same torque. When the rotor is unbalanced, the rotor of the ball mill shall be pulled out for static balance.

Problem 5: Huge vibration occurs when the ball mill reducer drives the mill. Solution 5: When the mill is installed with ball mill liners, there is no secondary grouting or the anchor bolt after the secondary grouting is not fastened properly. The winch is used to rotate the mill barrel, resulting in one end of the mill barrel displacement, and the two axes are not in a straight line, which causes vibration after the reducer drives the mill.

Treatment method: to readjust, so that the ball mill axis and reducer axis in the same plane axis line. The large-scale ball mill has a large volume and heavy weight, which makes the foundation sink and displace. Set monitoring settlement points beside the foundation; conduct observation, and adjust when settlement is found.

Solution 6: The sound of the normal operation of the ball mill reducer should be uniform and stable. If there is a slight knocking sound or hoarse friction sound on the gear and there is no obvious change during the operation, you can continue to observe and find out the cause, and stop the ball mill for treatment. If the sound is getting louder and louder, stop the ball mill immediately for an inspection.

It is worth noting that the balance wheel and intermediate wheel of the ball mill reducer are not installed according to the specified meshing tooth elevation, which will cause the high-speed shaft pinion of the ball mill to drive the large gear of the intermediate shaft on one side, while the pinion of the intermediate shaft of the ball mill drives the balance wheel, and the balance wheel of the ball mill turns to drive the intermediate shaft on the other side so that the reducer of the ball mill does not form both sides of the load sharing rotation, which occurs Its dangerous to make a noise.

The selection of the material of construction is a function of the application, abrasivity of ore, size of mill, corrosion environment, size of balls, mill speed, etc. liner design and material of construction are integral and cannot be chosen in isolation. A list of the primary material of construction is given, with the particular uses and strengths of each.

1. Before installing the liner, the dust in the cylinder should be removed. When the ball mill installs the liner, a layer of 1:2 cement mortar should be applied between the inner wall of the cylinder and the liner, and the liner bolts should be tightened while wet. The gaps between the liners are also smoothed with sand and grout.

2. Before installing the liner of the ball mill, the liner should be inspected and trimmed. The back and the periphery of the liner should be smooth and flat. The bolt holes should be thoroughly sanded and cast flash removed so that the bolts can penetrate smoothly.

4. Note that the direction of the liner should not be reversed. The long grinding machine generally divides the grinding cylinder into front and rear bins by the partition board. The feed end is the first bin, and the first bin is the step liner. When installing, the thin end of the step liner should be in the same direction as the arrow of the turning direction when the mill is working. The grate hole of the compartment board is tapered, and the large end of the cone mouth should be consistent with the discharge direction of the ball mill during installation. The cylinder liner cannot form an annular gap.

5. When installing the partition board, wear all the bolts, and then tighten the bolts gradually in three times. At the same time, note that the connecting bolts on the central disc in the cylinder body should be tightened first, and then the bolts on the cylinder body should be tightened. After all the bolts are tightened, the nut of the bolt on the central disk of the cylinder is spot welded to prevent loosening.

Qiming Casting is one of the largest manganese steel, chromium steel, and alloy steel foundry in China. Products include crusher wear parts, Crusher spare parts, mill liners, shredder wear parts, apron feeder pans, and electric rope shovel parts.

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