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If a ball mill uses little or no water during grinding, it is a 'dry' mill. If a ball mill uses water during grinding, it is a 'wet' mill. A typical ball mill will have a drum length that is 1 or 1.5 times the drum diameter. Ball mills with a drum length to diameter ratio greater than 1.5 are referred to as tube mills.
Get PriceA ball valve will be fitted at the side of the shell for gas discharge.The mill will be driven by a grid gear and pinion. The pinion will be coupled to a suitable gear box and that in turn coupled to a motor of appropriate H.P.The full assembly with the motor and gear box will be mounted on a three piece stand fabricated from heavy duty channel.
Get PriceA ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the shell may be either horizontal or at a small angle to the horizontal. it is partially filled with balls. The grinding media is the balls, which may be made of steel (chrome steel), stainless steel or rubber.
Get Price47 – Diameter of shell (in decimeters) i.e. 4.7 m diameter. 72 – Length of shell (in decimeters) i.e. 7.2 m length. The grinding in the ball and tube mill is produced by the rotating quantity of steel balls by their fall and lift due to tube rotation. The ball charge may occupy one third to half of the total internal volume of the shell.
Get PriceBall mill works on the principle of impact: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the shell may be either horizontal or at a small angle to the horizontal. it is partially filled with balls.
Get PriceAdvantages and features of the ceramic ball mill. The grinding fineness depends on the milling time. The motor of the ceramic ball mill is started by the coupling reduce voltage which lowers the starting electricity and the ball mill's structure is divided into integral type and freestanding type; advantages of the ceramic ball mill are lower investment, energy saving, structure novelty
Get Pricehe gearless motor (also called wrap- around motor or ring motor) is a very large synchronous motor. The poles of the motor are directly installed on a pole flange on the mill shell: this means the mill body becomes the rotor. The stator of the gearless motor is then wrapped around the mill.
Get Pricemill accelerates electrically controlled reaching an indivi-dually set mill angle between 30° and 45° (see icon 6 in figure 4) – 30° are selected in Figure 5 – where a strong counter-torque is applied. This counter-torque of up to 130% (almost in figure 5) stops the mill shell imme-diately. The charge slips due to its high kinetic
Get PriceThe basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum and finally the type of circuit open/closed
Get Pricegrates, motor rated power output, torque output, and rated speed (expressed as mill speed in the case of gearless mill drives, (GMDs), and shell liner/lifter wear so that the ex-pected range of operating conditions can be accommo-dated once the mill diameter has been set. In this respect, the ratio of mill diameter to mill length EGL is important
Get PriceMill speed: 16.6 RPM. Construction Materials 2-Piece shell Cast steel feed and discharge heads Rubber shell liners Rubber lifters with steel spine. Motor and Drive 1750 HP, 4000 Volt Reliance motor Falk 485A1 parallel shaft gear reducer, 5.1:1 ratio Eaton 4VC120 pneumatic clutch. Gears and Bearings 281-Tooth Ring gear 20-Tooth Pinion gear
Get PriceAs a result the motor does not have a separate (motor) rotor and thus no separate (motor) bearings. The number of poles is based on the required speed of the mill. The motor operates with typical frequencies from zero to about 6 Hz. In general, the bigger the mill diameter, the lower are the mill operating and critical speeds.
Get PriceA practical case of ball mill foundation is examined herein. The diameter of mill is 8.0 m with length of 13.1 m, operating at 12 rpm. The height of mill shaft is 18.1 m above ground.
Get PriceOutotec® MH Series Grinding Mills offer a cost effective, and easy to operate and maintain grinding solution across the mill lifecycle. The MH Series includes a range of SAG, ball, and rod mills in standardized sizes with a capacity of up to 3.1 MW installed power, and is based on over 100 years of experience with grinding technologies.
Get Priceball mill with a particular emphasis on the damping of the mill itself. It was considered possible that the mill could be a significant source of energy dissipation for torsional vibration. A small batch ball mill was investigated using a servo motor as both the drive and a torsional exciter.
Get PriceThe two main functions of a mill liner consist in protecting the mill shell against wear and in transmitting the energy of the mill motor to the grinding charge to carry out the required size reduction in the most efficient way. For a mill liner, the design as well as the liner material are to be considered. The required movement of the mill charge to carry out effi-
Get Pricedirectly on the mill shell through a flange motor carrier ring. One option is to mount this flange by using bolting connection on to the mill shell into the fixed mill bearing side. This is the location with least axial movement of the mill due to thermal expansion. Also the mill deflection due to bending after shut down is smallest at this
Get Priceball mill motor control base, and 30 years of experience with ball mill motor controls. Using this experience, Benshaw has provided the innovative technique of using a low voltage AC drive to power a medium voltage application to provide a customer with a reliable and cost effective solution for ball mill
Get PriceBall mill refiner up to 100 kg/h. Compact, vertical ball mill: – Jacketed grinding chamber for pre-heating and cooling – Easy cleaning characteristics – Adjustable grinding shaft speed – Temperature monitoring – Compatible with a product re-circulation mixing tank – Compatible with an automatic process control – Direct gear drive
Get Price12 x 14 ft (3.6 x 4.3 m) Marcy Ball Mill with 1,500 HP - 12 ft diameter and 14 ft length mill shell - Feed and discharge heads - Shell with steel liners installed (spare shells available at additional cost) - 2 piece bull gear (spare available at additional cost) - S
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