16x22ft, 2800kW Ball Mill. 4. TRUNNION BEARING (BRONZE BUSH BEARING) GENERAL The following section is to be used in conjunction with the Trunnion Bearing Assembly drawing. Thoroughly study both before proceeding with work. CLEANING The trunnion bearing assemblies are normally shipped to the field fully assembled.
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WhatsApp: +86 18838072829Crushed ore is fed to the ball mill through the inlet; a scoop (small screw conveyor) ensures the feed is constant. For both wet and dry ball mills, the ball mill is charged to approximately 33% with balls (range 3045%). Pulp (crushed ore and water) fills another 15% of the drum's volume so that the total volume of the drum is 50% charged.
WhatsApp: +86 18838072829A generalized SAG mill power draw equation developed by Austin, is given by: where the parameters used in the model are defined as: mp= net mill power (kW) K = a constant (kW/ton ) D = mill internal diameter (m) L = mill length (m) J = fractional volume of mill filled by total charge. εB = effective porosity of the total charge.
WhatsApp: +86 18838072829With the design criteria established the following repair/reinforcement procedures were performed. Initially the mill was jackedup to remove the weight of the mill and the charge from the trunnion. The sections in the upper half of the trunnion that either exhibited cracking or were less than (.75″) thick were removed.
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WhatsApp: +86 18838072829Make sure the bearing caps are not bolted down. ABOUT THE TRUNNION: Remove all of the bolts as a precaution no need to pull the bearing caps completely off. The mill needs to be jacked high enough to get the last shim in place so that when the mill is lowered onto the shims, it is no longer resting on the bearings.
WhatsApp: +86 18838072829Grinding Mills: Ball Mill Rod Mill Design Parts. ... AllisChalmers mills are provided with steel sole plates under the trunnion bearings. All mills have adjustable sole plates for lateral movement of the mill. ... Drives 3, 4 and 5, without magnetic clutch, are high starting torque drives requiring synchronous motors with approximate ...
WhatsApp: +86 18838072829The design charge load defined earlier is a direct input in the calculation of the trunnion bearing pressure. Rearing pressures are most accurately calculated when based on total rotating mill assembly weight plus total design charge weight. Then, by taking moments around each trunnion bearing for these components, determine the load which the ...
WhatsApp: +86 18838072829It was found that the mill vibration and the bearing temperature increased with motors power. Also, the results revealed that the mill noise reduced with the increase in water flow rate. ... on a laboratoryscale ball mill, ... As shown in Fig. 1, the bearings of motor 1, the bearings of pinion 1 and mill trunnion were selected to monitor their ...
WhatsApp: +86 18838072829In these cases, the feed to the ball mill may be from 10 to 100 mesh or even finer. Here this Ball Mill Design Calculator. ... which has made it possible to use flotation of a ball mill discharge without chokeups. ... Selfaligning main trunnion bearings on large mills are sealed and internally floodlubricated. Replaceable mill trunnions.
WhatsApp: +86 18838072829For fine grinding, the charge consists of small balls, which ensures the best possible grinding efficiency without obstructing the material flow through the ball charge. • Shell supported ball mill of wellproven design. • Either side or central drive. • Considerably shorter overall length than mills with trunnion bearings.
WhatsApp: +86 18838072829A trunnion bearing lubrication system retrofit featuring: • Customsized reservoir • Filtration system and heat exchanger • Temperature, flow, and pressure instrumentation Your challenge Maintaining oil temperature, flow, and cleanliness is vital for the health of your mill. If not controlled, fluctuations can shorten
WhatsApp: +86 18838072829A stepbystep systematic analytical design of the hydrostatic trunnion bearing is presented, followed by a discussion of grinding mill erection requirements to conform with the design. ... The St. Lawrence Cement mill. Both bearings have 4 shoes each with no "Satellite" shoes at the horizontal 3 and 6 o'clock positions. by Jorge October ...
WhatsApp: +86 18838072829On a 11'6" x 22'0" Ball Mill, the trunnion bearing lubrication system provides continuous low pressure flood oil for cooling and lubrication of the bearings, and high pressure oil for hydrostatic lift of the feed and discharge trunnions during startup of the mill. System monitors including pressure switches and flow monitors are provided, along with temperature sensors that monitor ...
WhatsApp: +86 18838072829Ball Mill Trunnion Bearing also known as the ball mill trunnion, is an important part of the ball mill that carries the rotation of the cylinder of the ball mill. ... it has high wear resistance and corrosion resistance and can run for a long time without damage. Good stability: Ball mill bearing adopts advanced technology and process in the ...
WhatsApp: +86 18838072829trunnion and the bronze bushing of a hydrostatic bearing. The lack of lubrication was originated by a logic failure which allowed the mill to start and run over the trunnion bearing bushing without the lubrication system to be turned on, that is, without oil film. The logic failure was caused by an operator fault.
WhatsApp: +86 188380728291. If a person is looking for a higher load machine where the surface area is restricted, Trunnion Bearings works the best. However, in the case of selfaligning and compressive loads, Slide Shoe Bearings are the bestsuited ball mill bearings. 2. Trunnion Ball Mill Bearings are widely used in many industries due to their popularity owing from ...
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WhatsApp: +86 1883807282911. Lubricant Data: Masbate Gold Project's SAG mill uses Compounded Gear Oil as their main lubricant. But a different class of Gear oil is use in every operating system of the SAG mill. SAG Mill Components Type Characteristic Motor Bearings Omala 150 Gear oil. 150 viscosity at 40 C and 15 viscosity at 100˚C Gearbox Omala 320 Gear oil. 320 viscosity at 40˚C and 25 viscosity at 100˚C.
WhatsApp: +86 18838072829Ball mill trunnion design. The trunnion design is an important factor for the operation of a ball mill. The trunnion must be strong enough to withstand the alternating stress during operation. The mill shell is generally made of rolled mild steel plates buttwelded together. Slots are drilled in the shell for bolts that hold the liners in place.
WhatsApp: +86 18838072829The stationary inlet can be offered for cement mills with trunnion or slide ring support and slide ring supported raw mills. The inlet is supplied as preassembled unit. The mill inlet and trunnion liner are suitable for dual direction of the mill rotation. The Inlet is equipped with a manually regulated
WhatsApp: +86 18838072829Without the balls in the c ... 4 17 mm inner diameter ball bearing. ... To ensure the stability of the mini ball mill, a ball mill base is design and fabricate to withstand the weight of the ...
WhatsApp: +86 188380728293 The design offers such benefits as: xElimination of castings and the structural risk associated with them. xFeed and discharge designed to process requirements rather than to restrictions imposed by trunnion bearings. xMinimised risk of feed blockage through short trunnions. xQuick accessibility to mill interior. xLighter weight and lower number of flanges for ease
WhatsApp: +86 18838072829Installation of a ball mill. particular emphasis of video is how to install the trunnion bearings, scraping, etc. ideal for total beginners. doesnt go into m...
WhatsApp: +86 18838072829A trunnion (from Old French trognon 'trunk') [1] is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development. [2] Alternatively, a trunnion is a shaft that positions and supports a tilting plate. This is a misnomer, as in reality it is a cradle for the true trunnion ...
WhatsApp: +86 18838072829"pinching" of the trunnion and extends the life of these integral components What can Excel do to help you? Two Piece Head Trunnion Design Standard 1Piece Design Less Resistance Modified Bearing Design Excel 2Piece Design Mill Heads • Ductile Iron • Feed End • Discharge End With or Without Integral Trunnions Trunnion Liners ...
WhatsApp: +86 18838072829High operating reliability Partition diaphragm High capacity Outlet wall Smaller builtup space in comparison with Grinding charge Cement grinding plant with a Ø x m mills seated on trunnion bearings mill seated on shoetype bearings. Ball mill structure
WhatsApp: +86 18838072829Type CHRK is designed for primary autogenous grinding, where the large feed opening requires a hydrostatic trunnion shoe bearing. Small and batch grinding mills, with a diameter of 700 mm and more, are available. These mills are of a special design and described on special request by all Ball Mill Manufacturers.
WhatsApp: +86 18838072829Trunnion Bearing Assembly Ball Mill Rod Mill The first part of the mill that we will look at is the TRUNNION BEARING. This is a HYDROSTATIC BEARING which is a slow moving bearing that carries a heavy load. Usually it is constructed from Babbitt's metal.
WhatsApp: +86 18838072829Mills Ball Mill Rod Mill Design Parts Read online for free. ... AllisChalmers mills are provided with steel sole plates under the trunnion bearings. All mills have adjustable sole plates for lateral ... Drives 3, 4 and 5, without magnetic clutch, are high starting torque drives requiring synchronous motors with ...
WhatsApp: +86 18838072829The bearing surface is sacrificed, with Babbitt actually becoming the lubricant, and the shaft surface is preserved in case there is a loss of lubrication or other operating anomaly. In the 17th century, Robert Hooke began utilizing "bell" metal as a bearing surface material. Bells were often formed with a bronze alloy that usually included ...
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