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ball mill plates materials

Ball Mill

Ball Mill

Ball mill is the vital equipment for recrushing after being crushed.

Processing ability:0.5-500t/h

Feeding size:≤25mm

Applied material:cement, silicate, new-type building material, refractory material, fertilizer, ore dressing of ferrous metal and non-ferrous metal, glass ceramics, etc.

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ball mill liner design - mineral processing & metallurgy

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 from 1.5 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 π D in meters (for D in feet* divide 3.3 π 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 can nest 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 only reduce operating costs but can reduce noise levels

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

ball mill liner design - mineral processing & metallurgy

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 made of 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 plates are 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 iron or 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 have a 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

grinding mills - 911metallurgist

Common types of grinding mills include Ball Mills and Rod Mills. This includes all rotating mills with heavy grinding media loads.  This article focuses on ball and rod mills excluding SAG and AG mills. Although their concepts are very similar, they are not discussed here

As the mill revolves, lifters assist in picking up the grinding charge and elevate it to an angle at which gravity overcomes friction and centrifugal force. The charge then cascades downward, effectively grinding particles of material within the mill by continuous, repeated impact and attrition action

Grinding Mill speed is one of the factors affecting the character of the cascading charge. As shown in the illustrations, the lower the percentage of critical speed, the smoother the flow of balls from top of charge to bottom. Higher percentage of critical speed is used for impact grinding of large feed. Lower percentage of critical speed is used for attrition grinding when a fine product is desired. The graph below will be helpful in determining percentage of critical speed when internal mill diameter and RPM are known. A Grinding Mill is a revolving cylinder loaded to approximately one-half its volume with steel rods, balls or pebbles

Grinding mills reduce particle size by impact, rolling and sliding. Of the many types in use, the cylindrical mill, which employs a cascading mass of balls or rods, is universally used for the size reduction of hard, moderate to highly abrasive materials, such as minerals, ores, stone, and chemicals. ,

grinding mills - 911metallurgist

A cylindrical mill, when operating under uniform conditions, will produce a uniform product. Wear on grinding surfaces has little effect on capacity or product size. Very little maintenance is required with these mills, downtime being a negligible factor in their operation. For continuity of operation, the cylindrical mill has no equal

Grinding mills of this type will give you dependable, trouble-free operation year after year, with “planned” periods of stoppage for renewal of parts. Initial cost is distributed over a long operating period. Many grinding mills are still in service after more than 40 years of almost continuous operation. Ton for ton of material handled, the cylindrical type mill has proved to be the most economical investment for reducing moderate to extremely abrasive materials

ball mill-henan centbro machinery (stm) equipment co., ltd

This type of machine are widely used in mineral , metallurgy, chemical industry, building materials, coal, matallugrge, powder with material mositure under 8% and hardness below 8 class. The finess of the final products can be adjusted during the range from feldspar, calcite, limestone, dolomite, graphite, gold and silver ore, rutile, aluminum, titanium dioxide, kaolin, bentonite, flint clay, fluorite, wollastoniteore, phosphate rock, silicon metal, electrolytic fierce, coking, corundum, silicon smelting, calcic magnestie mine, coal, actiated carbon, plant ash, coal gangue, slag, ziron sand, iron ore, potash feldspar, talc, granite, marble, barite, wax, feldspar, clay, glass, coke, pet coke, fly ash, yanliu, clay ceremsite sand, salt mud, sand, additives, curing agent, waste, waste brick of pottery and porcelain and refactory materials

This type of machine are widely used in mineral , metallurgy, chemical industry, building materials, coal, matallugrge, powder with material mositure under 8% and hardness below 8 class. The finess of the final products can be adjusted during the range from feldspar, calcite, limestone, dolomite, graphite, gold and silver ore, rutile, aluminum, titanium dioxide, kaolin, bentonite, flint clay, fluorite, wollastoniteore, phosphate rock, silicon metal, electrolytic fierce, coking, corundum, silicon smelting, calcic magnestie mine, coal, actiated carbon, plant ash, coal gangue, slag, ziron sand, iron ore, potash feldspar, talc, granite, marble, barite, wax, feldspar, clay, glass, coke, pet coke, fly ash, yanliu, clay ceremsite sand, salt mud, sand, additives, curing agent, waste, waste brick of pottery and porcelain and refactory materials

5.Cylinder is rolled and welded with Q235B steel plate. (the steel thickness is generally 1/100 of the cylinder diameter, for example ball mill of Φ1500, the steel plate thickness is 16 mm), the material of inlet and outlet hollow shaft is ZG35

6. The hollow axis adopts the cast steel and the lining can replace, the rotating big gear processes in the way of casting rolling gear. The barrel body is wearable well and bears wearable scaleboard. This machine run steadily and works reliably

ball mill-henan centbro machinery (stm) equipment co., ltd

Henan Centbro Machinery(STM) Equipment Co., Ltd sepecializes in the production and sales of mining machine and equipment, Jaw Crusher, Impact crushers, Cone Crusher, Sand making machines, ball mill, Raymond type mill, coal mills and other euqipment. The factory has a professional production base of more than 10,000 square meters, more than 100 workers, more than 50 professional and technicist and R&D capabilities

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