Ball Mill Design/Power Calculation 911 Metallurgist
A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power The ball mill motor power requirement calculated above as 1400 HP is the power that must be the desired motor power and drive rating, the maximum design mill speed, and the maximum design ball charge volume (Barratt, 1989) For single pinion and dual pinion drives, with 21 MW now a distinct possibility, the probability of pinion changes to a higher mill speed should always be Mill drives: the desire for increased power and the The drive motor for the Ball mill ranges fro 05 MW to 25 MW depending on the hardness of Bauxite, feed size and operating capacity of the mill for meeting the hourly alumina production requirement as described in earlier post Generally squirrel cage induction motors are installed as drive motor for the Ball millProcedures for Systematic Start up and Stoppage of mounted to a motor scoop or base plate Typical motor speeds are either 4 or 6 pole, ie 1750 rpm or 1170 rpm for 60 Hz applications and 1450 rpm or 970 rpm for 50 Hz applications The advantage of using a four pole motor allows for a smaller footprint and a smaller brake if required by the process A six pole motorSelecting Inching Drives for Mill and Kiln Applications motor rating The equation that relates motor load to measured current values is shown in Equation 4 Equation 4 The Slip Method The slip method for estimating motor load is recommended when only operating speed measurements are available The synchronous speed of an induction motor depends on the frequency of the power supply and on theDetermining Electric Motor Load and Efficiency
BAB II LANDASAN TEORI 21 Pengertian Ball Mill
Agar mill bekerja dalam kondisi optimal, kecepatan putaran harus sedekat mungkin sampai 75% dari kecepatan kritis, dan kecepatan normal dianggap antara 67 sampai 78% dari kecepatan kritis These Online Motor Sizing Tools are designed to make sizing a motor faster and easier These forms calculate the necessary Torque, Speed, Stopping Accuracy and System Inertia important when selecting a proper motor for the application Call our experts for any assistance needed: 1800GOVEXTA (4683982) (MF 7:30am CST to 5:00pm PST)Motor Sizing Tools Oriental Motor In one configuration, each lowspeed motor (usually 200 rpm) supplies power to the ring gear through a pinion, and the ring gear turns the mill Other applications use a higherspeed motor Ring gear drives huge grinding mill Machine Design • Radial bearing: a constant radial load, being 5% of the basic static load rating Co • Thrust bearing: a constant axial load, being 2% of the basic static load rating Co • Open bearings with Normal clearance For oil lubricated bearings: • Lubricant: mineral oil without EPadditives having a Bearing Handbook for Electric Motors