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WhatsApp: +86 18838072829The mill used for this comparison is a diameter by meter long ball mill with a 5000 HP drive motor. It is designed for approximately 90 per hour. This type twocompartment mill is a state oftheart shell supported cement finish mill. The torque and time requirements of the mill with the ball
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WhatsApp: +86 18838072829ball mills, 18x27 drive with an air clutch. motor, 602,000 6050 D Primary SAG, 34x1 6 Two vafiable speed dc motors coupled mill, 4 million 22,500 to a gear drive with air clutches. motor, million each 6000 Two secondary ac synchronized motors coupled to a gear mill, million ball mills, 18x27 drive with an air clutch, motor ...
WhatsApp: +86 18838072829The pinion is a small gear with a matching tooth profile to the ring gear on the ball mill. From a bearing point of view, there are two bearings at the end of the shaft on the pinion and there are ...
WhatsApp: +86 18838072829wear of the pinion surface should not exceed 30% of the tooth thickness. The wear of the tooth surface of the ball mill is not more than 25% of the tooth thickness. It can be used on the reverse side and should be scrapped when it is 1/2. deformation of the rim of the large gear of the ball mill should not exceed
WhatsApp: +86 18838072829Monzonite Bond Ball mill work indices (Wi) averaged /t, with a maximum variation of ±9%. The inferred average orebody Wi, based on ... Maximum SAG mill power was determined by deducting the installed ball mill pinion power of /t (16,400kW) from the maximum overall circuit power of /t to give /t (18,060kW).
WhatsApp: +86 18838072829Ball mill 9000 HP Motor speed 990 rpm Mill speed 14 rpm R/L ill diameter 5 m Mill bearing 22 m Project A Twopinion girth gear drive Fig. 2A 1 Annulus, 2 pinions 2 Reducing gears, each 2stage 2 Main motors 2 Turning gears Project B Central drive Fig. 2B 1 Double planetary gear 1 Main motor 1 Turning gear
WhatsApp: +86 18838072829a dual pinion configuration is required, this also implies that mills bigger than 18MW can only be driven by GMDs. 9 12 6 18 36 Central Drive Single Pinion Dual Pinion Gearless Number of mills Power [MW] 4 Figure 1: Typical mechanical mill configurations The central driven mill solution is found on the lower power range of the mills due to the high
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WhatsApp: +86 18838072829other methods. The ball mill correction factor (CFnet) is empirical and one way of estimating it was presented by Amelunxen at the Procemin 2013 Short Course by Doll Amelunxen. The SGI equation uses a transfer size between a SAG and ball mill; it is proposed that a synthetic transfer size of 2100 µm be used to model singlestage SAG mills. ˇ
WhatsApp: +86 18838072829The pinion of the primary ball mill. 99 /89/010099+09 / 1989 Academic Press Limited 100 A. SZCZEPANIK with corrected pitch, the vibration spectrum remained very similar to the spectrum of the old A pinions.
WhatsApp: +86 18838072829at the drive pinion(s). 4. Obtain the circuit throughput rate (dry tonnage). In the laboratory: 1. Conduct screen analyses of the circuit feed and product samples. 2. Conduct Wi test(s) on the circuit feed (see Section 8).. Use a 1,190 µm screen to close the rod mill Wi test for these purposes. Choose a closing screen for the ball mill
WhatsApp: +86 18838072829Usually, the power of the ball mill pinion shaft was directly proportional to the motor power of the ball mill, and the correlation coefficient was The correlation coefficient and equality (18) [32] were adopted to ensure the safe and stable production of the ball mill, where N e was the motor power of the ball mill. (18) N e ...
WhatsApp: +86 18838072829SAG and Ball mill tests and results in the obvious situation where: 1) SAG pinion energy + Ball Mill pinion energy = Total Grinding pinion energy By measuring these two components which can be called coarse and fine grinding parameters, the total grinding pinion energy can be determined. But this is only part of the story.
WhatsApp: +86 18838072829Our high torque, high precision integral and nonintegral mill pinions are used in SAG, horizontal ball mill and rotary kiln applications across the globe. Book an appointment. ... the walk, talks the torque. Supplied as an individual component or as a fully optimised system comprising a girth gear, mill drive gearbox, pinion and barring drive ...
WhatsApp: +86 18838072829Ball Mill Sole Plate. This crown should be between .002″ and . 003″, per foot of length of sole plate. For example, if the sole plate is about 8′ long, the crown should be between .016″ and .024″. Ball Mill Sole Plate. After all shimming is completed, the sole plate and bases should be grouted in position.
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WhatsApp: +86 18838072829The pinion, usually integral with the pinion shaft, is cut from an alloy steel forging and heat treated prior to cutting the teeth. The pinion shaft is double ended so it is also reversible. All ball Mill gearing is designed in accordance with sound engineering principles and at the same time with consideration given to the long range economics ...
WhatsApp: +86 18838072829We will begin with the mill's bull gear assembly and work towards the motor, The BULL GEAR, sometimes called the RING GEAR is designed to turn the mill transforming the energy of the motor into motion for the mill. By mill we refer to Ball Mills, Rod Mills and SAG Mills. Anything gear and pinion really. The discharge end of the mill; For the ...
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WhatsApp: +86 18838072829Power drawn at the pinion is 448 kW, kWh/tonne (SAG mill) and 570 kW, kWh/tonne (ball mill) when processing mtph, for a total of kWh/tonne or % above the conventional estimate. ... Obviously, the SAG mill is consuming more and the ball mill less power than was predicted by the empirical method, but the overall ...
WhatsApp: +86 18838072829Methods to Estimate AG/SAG Mill Grinding Power Requirements. (1) Using the results of SMC data. (2) Using SAG Power Index (SPI) data. (3) Using the 1989 Barratt method updated on Alex Doll's Web site (February 16, 2015) (3) Using Don Burgess' method (11th Mill Operators Conference 2012) They seem to give very different predictions for ...
WhatsApp: +86 18838072829The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S dBWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.
WhatsApp: +86 18838072829Drive packages from a single source: industrial gear units and segmented girth gears. Large girth gears are installed around the cylinder to rotate the horizontal ball mill cylinders. A pinion connects these directly to the industrial gear unit. SEWEURODRIVE does not just provide industrial gear units, we provide the complete drive package ...
WhatsApp: +86 18838072829The "pinion power" is the mechanical power available at the output shaft of the motor and is related to the torque required to turn the mill and the mill speed. If you remember back to your electrical engineering courses, the power available in a circuit drops due to losses as you move down the circuit (because each electrical item causes a ...
WhatsApp: +86 18838072829Mechanochemistry using ball mills is a promising technique with applications in organic and inorganic chemistry as well as material sciences [14].During ball milling, up to 80 % of the energy that is generated in the mill is dissipated as heat [].This is why measurement and control of the temperature in the ball mills is important, for example, if heatsensitive products are formed that ...
WhatsApp: +86 18838072829The main part of the ball mill mainly include feeding part, discharging part, a rotary part, a transmission part (reducer, small gear, motors, electrical control) and other parts. Hollow shaft adopts steel castings, the liner is detachable, slewing gear hobbing with casting, the cylinder body with wearresistant liner, with good resistance to wear.
WhatsApp: +86 188380728291. Fill the container with small metal balls. Most people prefer to use steel balls, but lead balls and even marbles can be used for your grinding. Use balls with a diameter between ½" (13 mm) and ¾" (19 mm) inside the mill. The number of balls is going to be dependent on the exact size of your drum.
WhatsApp: +86 18838072829Ball mills as used in mining, cement production and allied industries consume about 40% to 56% of the total electric power ... pinion bearing temperature, mill motor temperature, mill motor vibration, pinion gear vibration of ⁰C, 44 ⁰C, 59 ⁰C, mm/s2 and mm/s2, respectively. Decrease in any of the influential factors considered
WhatsApp: +86 18838072829fRunningin procedure Ball Mill Open Gear drive. 3. Process. •load with appr. 60 % of mill balls. •continuos spraying of runningin grease. •only little charge of raw material. •check load pattern after 5, 15, 30 minutes by. using a stroboscope. •realign if necessary.
WhatsApp: +86 18838072829In today's ultra large ball mills of up to 28′ diameter and 44′ long; a 2832% ball charge is your maximum. Source: Paul Staples; A grate (diaphragm) discharge ball mill will consume 15% more power than an overflow (open) discharge ball mill even though the grinding efficiencies are the same. Source: Lewis, Coburn, and Bhappu
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