Selecting Inching Drives for Mill and Kiln Applications
The standard inching drive motor is a NEMA or IEC frame typically foot mounted to a motor scoop or base plate. Typical motor speeds are either 4 or 6 pole, i.e. 1750 rpm or 1170 rpm for 60 Hz applications and 1450 rpm or 970 rpm for 50 Hz applications. The
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Mill Power Draw Models The mill power draw models are used to predict how much power will be consumed by a particular type of mill, mill geometry and set of mill operating conditions. This power is transferred to the ore and used to predict the throughput when ...
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3 SAG mill (8 – 15% ball charge) Variable competency ore 4 High ball charge SAG mill (15 to 25% ball charge) Incompetent ore 5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive6
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Our solution: SIMINE Gearless mill drives – outstanding reliability for your mine The gearless concept The gearless drive avoids any contact between the rotating mill and the static parts of the motor. This allows for contin-uous workflow without maintenance on the
Get MoreTECHNICAL How to Spec a Mill Gear
mill to be processed, the typical mill speed is ~75% of the theoretical criti-cal speed of that mill. Using the above formulas, significant experience of how the grinding process works, and mate-rial properties of the ore being ground, the mill builder can provide the
Get MoreEquipment Load Factors, Use Factors and Diversity Factors As …
Load factor - the ratio of the load that a piece of equipment actually draws when it is in operation to the load it could draw (which we call full load). For example, an oversized motor - 20 hp - drives a constant 15 hp load whenever it is on. The motor load factor is
Get MoreWhat is Sag & Tension in transmission lines & Formula …
Sag and Tension: Sag is an interesting topic to discuss.We generally see a lot of overhead lines on our way.Sag in general words can be said that distance between the highest point of electric poles or towers and the lowest point of a conductor connected between two poles or towers.You will know how to calculate sag and sag formula.
Get MoreTECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL …
As 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
Get MoreBall Mill Design/Power Calculation
· Example Calculation 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 …
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SAG mill (4% ball charge, 90% Nc) A cross between AG and SAG for average competency, abrasive ores. Typically operated in RSA on Witwatersrand Gold Ore Driefontein (Underground), Kloof, Jacobina 6 SAG mill with recycle crusher (8 – 15% ball charge)
Get MoreChoosing a SAG Mill to Achieve Design Performance
SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates. Typical tests required to define a hardness variability function, are given below in Figure 1.
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