mill shell rubber backing

specialised reline service - mining technology | mining news and views updated daily

specialised reline service - mining technology | mining news and views updated daily

Specialised Reline Services is one of Australias leading mill relining companies and has developed a world-renowned reputation for safety, reliability and service that exceeds expectations in all areas of grinding mill lining replacement, shutdown planning and consultation. Our success and reputation is maintained by producing quality work, maintaining a clear company focus by providing safe, reliable and cost-effective solutions. Pre-shutdown planning and scheduling Optimisation, timing and scheduling for shutdown critical path activities. Determine the labour, equipment and consumables required during shutdown. Grinding mill lining removal and installation for Ball, SAG, Rod and Tower mills SRS has extensive expertise in all mill lining systems that will optimise results, leading to more efficient maintenance and higher mill availability. This is undertaken by using fully trained reline teams, using the latest tools and equipment from Russel Mining Equipment, Norbar, Torcup, RAD Torque systems, and URYU air tools.

Our success and reputation is maintained by producing quality work, maintaining a clear company focus by providing safe, reliable and cost-effective solutions. Pre-shutdown planning and scheduling Optimisation, timing and scheduling for shutdown critical path activities. Determine the labour, equipment and consumables required during shutdown. Grinding mill lining removal and installation for Ball, SAG, Rod and Tower mills SRS has extensive expertise in all mill lining systems that will optimise results, leading to more efficient maintenance and higher mill availability. This is undertaken by using fully trained reline teams, using the latest tools and equipment from Russel Mining Equipment, Norbar, Torcup, RAD Torque systems, and URYU air tools.

Optimisation, timing and scheduling for shutdown critical path activities. Determine the labour, equipment and consumables required during shutdown. Grinding mill lining removal and installation for Ball, SAG, Rod and Tower mills SRS has extensive expertise in all mill lining systems that will optimise results, leading to more efficient maintenance and higher mill availability. This is undertaken by using fully trained reline teams, using the latest tools and equipment from Russel Mining Equipment, Norbar, Torcup, RAD Torque systems, and URYU air tools.

SRS has extensive expertise in all mill lining systems that will optimise results, leading to more efficient maintenance and higher mill availability. This is undertaken by using fully trained reline teams, using the latest tools and equipment from Russel Mining Equipment, Norbar, Torcup, RAD Torque systems, and URYU air tools.

Backing rubber is essential to protect the mills shell from wear by contact with slurry. SRS is an industry leader in mill backing rubber replacement during relines, having the ability to coordinate rubber work activities during relines to deliver a complete reline service. Water jetting Services Our team of high-pressure water jetting operators have extensive industry knowledge and experience with a large of range of specialist equipment. Our industrial water jetting service removes unwanted materials from any surfaces using environmentally friendly, dust-free processes. Bolt Torquing Mill bolts that are tensioned properly work at their optimum efficiency, preventing breakages and loose bolts. At SRS we have a large range of calibrated torque units for every bolt fastening application, using Norbar, Torcup, and RAD Torque systems, ranging from 500Nm to 12000Nm. Trommel and trunnion liner change outs and repairs Worn mill trunnions can result in bearing failures and cause structural failure of the entire mill. At SRS we have the resources and knowledge to minimise change out time for trunnion liners and trommel screen replacement requirements. Reline equipment and tools As part of our extensive reline service we have fully stocked reline trailers and workshops, giving us the ability to mobilise at short notice. This is backed up by a fully equipped maintenance workshop located in Geraldton, WA, to maintain our equipment, and provides a distinct competitive advantage, ensuring the highest standards are achieved for all equipment. Qualified supervisors with extensive reline experience All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

Our team of high-pressure water jetting operators have extensive industry knowledge and experience with a large of range of specialist equipment. Our industrial water jetting service removes unwanted materials from any surfaces using environmentally friendly, dust-free processes. Bolt Torquing Mill bolts that are tensioned properly work at their optimum efficiency, preventing breakages and loose bolts. At SRS we have a large range of calibrated torque units for every bolt fastening application, using Norbar, Torcup, and RAD Torque systems, ranging from 500Nm to 12000Nm. Trommel and trunnion liner change outs and repairs Worn mill trunnions can result in bearing failures and cause structural failure of the entire mill. At SRS we have the resources and knowledge to minimise change out time for trunnion liners and trommel screen replacement requirements. Reline equipment and tools As part of our extensive reline service we have fully stocked reline trailers and workshops, giving us the ability to mobilise at short notice. This is backed up by a fully equipped maintenance workshop located in Geraldton, WA, to maintain our equipment, and provides a distinct competitive advantage, ensuring the highest standards are achieved for all equipment. Qualified supervisors with extensive reline experience All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

Mill bolts that are tensioned properly work at their optimum efficiency, preventing breakages and loose bolts. At SRS we have a large range of calibrated torque units for every bolt fastening application, using Norbar, Torcup, and RAD Torque systems, ranging from 500Nm to 12000Nm. Trommel and trunnion liner change outs and repairs Worn mill trunnions can result in bearing failures and cause structural failure of the entire mill. At SRS we have the resources and knowledge to minimise change out time for trunnion liners and trommel screen replacement requirements. Reline equipment and tools As part of our extensive reline service we have fully stocked reline trailers and workshops, giving us the ability to mobilise at short notice. This is backed up by a fully equipped maintenance workshop located in Geraldton, WA, to maintain our equipment, and provides a distinct competitive advantage, ensuring the highest standards are achieved for all equipment. Qualified supervisors with extensive reline experience All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

Worn mill trunnions can result in bearing failures and cause structural failure of the entire mill. At SRS we have the resources and knowledge to minimise change out time for trunnion liners and trommel screen replacement requirements. Reline equipment and tools As part of our extensive reline service we have fully stocked reline trailers and workshops, giving us the ability to mobilise at short notice. This is backed up by a fully equipped maintenance workshop located in Geraldton, WA, to maintain our equipment, and provides a distinct competitive advantage, ensuring the highest standards are achieved for all equipment. Qualified supervisors with extensive reline experience All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

As part of our extensive reline service we have fully stocked reline trailers and workshops, giving us the ability to mobilise at short notice. This is backed up by a fully equipped maintenance workshop located in Geraldton, WA, to maintain our equipment, and provides a distinct competitive advantage, ensuring the highest standards are achieved for all equipment. Qualified supervisors with extensive reline experience All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

All supervisors undertake safety leadership training to gain skills in key practices and principles of health and safety at an operational level. These skills assist our supervisors in creating and maintaining a safe workplace by improved communication of information and the application of risk management processes Trained, job-ready reliners Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

Our Reliners go through extensive training before they arrive on site, beginning with a thorough safety induction process that includes fitness for work, risk assessment, safe hands and safe driver training. All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

All employees are trained in confined space entry, along with working at heights. Most of our employees have high-risk tickets for forklifts, rigging and elevated work platforms. This training is an ongoing process with active mentoring by supervisors and the safety team. Safety Management The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

The safety management team maintains and improves the health and safety systems and processes, carrying out training, undertaking workplace risk assessments and instigating changes in current work practices that prevent accidents, injuries and other adverse consequences. White Papers SRS Capability Statement Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation. Company Links www.srs.reline.com.au

Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation.

Servicing the mining and mineral processing industries, Specialised Reline Services (SRS) has developed a world-renowned reputation for safety, reliability and service that exceeds its market competitors in grinding mill lining replacement, installation and consultation.

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.

rod mill liners

rod mill liners

Among the cast materials used for linings are Ni-Hard. chrome-molybdenum steel, and manganese steel. Rolled alloy steel plate with lifter bars is availableRod mill liners are subjected to severe impact. Premature breakage and scrap loss are reduced by correct selection of liners for the specific gnnd-mg duty. Additional benefit results from use of a backing material, such as rubber between the liners and the mill shell.

Without the cushioning effect of the ore, the impact of the tumbling rods can break a rod mill liner especially if the force is concentrated at one spot. If the load comes down on a small piece of rod or other hard object such as a bolt or nut that happens to be on a worn or weak liner. The entire weight of the rod or rods will be transferred to that spot. The result may be a broken liner. Of course the condition of the mill liners will be a major factor in its survival.

Even if the liner doesnt break, the impact will begin to loosen the bolts that hold the liners in. Once these bolts are loose they will begin to leak. Leaking bolts on a mill can cause damage to other equipment by getting dirt into motors or gears, and at the very least they cause a mess to be cleaned up.

There are three basic types of wet tumbling mills. They are,ROD MILLS which we just finished discussing, BALL MILLS, and AUTOGENOUS MILLS. The Ball mills are much like the Rod mills except that they use balls as their grinding media. The size of these balls may range from three quarters of an inch to over five inches in diameter. There is a definite difference in the grinding performance between a Ball mill and a Rod mill. The Rod mill has a higher impact force than a Ball mill. This makes the Rod mill better suited to grinding courser or harder ore. In contrast the Ball mill is more effective in producing a finer grind. In most mines, where there is more than one mill grinding the ore, as in the case of our third and fourth schematics. You will find the first mill to grind the rock, sometimes referred to as the PRIMARY GRIND, will be a Rod mill. The SECONDARY GRIND will be a Ball mill. In some cases if the work index of the ore is low enough the primary grind maybe a Ball mill as well. The difference between primary and secondary grinding mills is in the design of the liners and the size of the grinding media. The primary grind requires a higher lift to get the impact necessary to reduce the size of the ore.

A secondary mill will require the high surface contact with more of the grinding motion that the lower cascade brings. This means that the secondary mill will have LOW PROFILE ROD MILL LINERS in them. If it is a ball mill being used as the primary grind the size of the grinding media will be increased, this is to increase their impact. A HIGHER PROFILE LINER may also be used. The two variables, the high surface contact and the greater impact will be balanced, to produce the cheapest and best combination.

trelleborg provides rubber lifter ball mill solution to australian gold mine - international mining

trelleborg provides rubber lifter ball mill solution to australian gold mine - international mining

Trelleborgs engineered products operation has supplied a lower cost, long lasting rubber lifter bar solution to Australias largest open pit gold mine for one of their ball mills. A valuable alternative to traditionally used composite steel, they offer a number of significant benefits such as a longer life and reduced downtime. Trelleborg has provided rubber lifter bars in special grade compound 1605AM to replace the existing composite steel solution which lines the mines grinding mills. These special grade rubber lifter bars have achieved the same life expectancy as composite steel, and also provide reduced power draw, noise pollution and weight, which decreases the impact on rotating components and makes the bars easier to handle.

Downtime is a significant issue faced by the mining industry, and the mining and material processing industry is always looking for ways to enhance availability of the mills that grind and blend materials. Trelleborgs rubber lifter bars offer increased operational efficiencies, significantly reduced downtime, simple wear monitoring and life predictability. In addition, when compared with steel, a rubber solution also provides superior resistance to the severe impact, high temperature and abrasion caused by the comminution of the ore within the mines grinding mill, lengthening its life. Composite steel is currently the traditional material of choice for primary and some secondary milling applications and until now has provided a whole-life performance that alternatives could not. However, the development of Trelleborgs special grade rubber compound and various face angles to suit any application, offer greater value and performance versus composite steel lifter bars.

Trelleborgs expertise in the use of polymers and polymer composites means that it is at the forefront of efficient and effective mill lining solutions. By optimizing design and specialized rubber compound selection for all milling wear protection applications, including lifter bars, Trelleborg can provide longer lasting, higher performance solutions. Trelleborg offers a wide range of rubber lifter bars and plates for ball mills, rod mills and drum scrubbers. The standard rubber lifter sizes range from 50 mm-250 mm wide and 50 mm-300 mm in height, and come complete with aluminium and steel tracks, with different face angles to suit the milling or scrubbing application. Trelleborg also provides a wide range of shell plates, grate plates, head plates and filling segments, including the backing rubber to protect the mother plate of the mill.

trelleborg raises bar in ball mills with rubber lifter bars - international mining

trelleborg raises bar in ball mills with rubber lifter bars - international mining

An all-rubber lining has been successfully developed by Trelleborg for composite lifter bar solutions. The company recently developed and supplied a cost effective, long lasting rubber lifter bar solution for a ball mill in Australia. The success with the special 1605AM rubber compound and design has given Trelleborg the opportunity to offer its clients an alternative to composite steel lifter bars.

Composite lifters can not only add to the load in the mill, but are also difficult to handle in confined spaces and take much longer to install, adding to downtime and installation costs. The lifter bars made with new 1605AM rubber compound come with added benefits such as; easy handling, quick installation time, reduced power draw and noise pollution. The reduction in overall weight decreases the impact on rotating components.

Downtime is a significant issue faced by the mining industry, and the mining and material processing industry is always looking for ways to enhance availability of the mills that grind and blend materials. Trelleborg says its rubber lifter bars offer increased operational efficiencies, significantly reduced downtime, simple wear monitoring and life predictability. In addition, when compared with steel, a rubber solution also provides superior resistance to the severe impact, high temperature and abrasion caused by the comminution of the ore within the mines grinding mill, enhancing the life of the mill.

Composite steel is currently the traditional material of choice for primary and some secondary milling applications; and until now, has provided a whole-life performance that alternatives could not. However, the development of Trelleborgs special grade rubber compound and various face angles to suit any application, offer greater value and performance versus composite steel lifter bars, without compromising the available volume and throughput in the mill.

Trelleborg offers a wide range of rubber lifter bars and plates for ball mills, rod mills and drum scrubbers. The standard rubber lifter sizes from Trelleborg range from 50 mm to 250 mm wide and 50 mm to 350 mm in height. They come complete with aluminium and steel tracks, with different face angles to suit the milling or scrubbing application. Trelleborg also provides a wide range of shell plates, grate plates, head plates and filler segments, including the backing rubber to protect the mother plate of the mill.

With over 100 years experience in the mining industry and expertise in the use of polymers and polymer composites, Trelleborg has the ability to provide cost effective lining packages with superior grades of rubber and composite steels using the latest moulding techniques.

tubular rod mills - sciencedirect

tubular rod mills - sciencedirect

The designs of tubular mills loaded with steel rods along its length as the grinding medium are described in this chapter. Details of operation and computations of mill capacities and the power consumption are explained with illustrative practical examples and solution of problems useful for both understanding the process and its practical operation. The importance of rod mills in comminution circuits is explained by flow diagrams and sketches. Mathematical correlations of variables are explained with examples and worked solutions.

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