3/30/2013· Ball mill torque curve:- Cascading point is at 60°, independent of speed. Ball Mill Speed,Mill Speed Influence,Grinding Efficiency For Ball Mill Speed, Influence of Mill by multiplying the torque on the driving shaft slope is not affected by the mill speed as the curves are mostly

ball mill speed torque curve stone crusher machine Ciros crushing equipment is designed to achieve maximum productivity and high reduction ratio. From large primary jaw crusher and impact crusher

5/1/2017· At N l = 12 (Fig. 19b), the distance between each torque curve becomes small and shows the same changing trend in comparison to that at N l = 24, which is roughly and directly proportional to the rotation rate when the ball mill works at a low speed and is inversely proportional to the rotation rate when the ball mill works at a high speed.

correct form of the torque curve when the simple torque-arm method of calculation was used. The amount of slip within the charge is independent of the liner r Vector from centre of mill to centre of ball r 0 R a s r.cos~ ~ Vector directed from tip to base of lifter bar s Linear velocity of ball up lifter face

1/1/2018· Torque in tumbling ball mills For a specific load and operating conditions, the torque appearing in a tumbling ball mill is a highly variable magnitude in the time domain. This fact is due to the operating principle of ball mills, which is based in the elevation process of balls and material from the toe region to the shoulder region of the drum.

5/1/2017· The torque of liners and baffles are affected by lifter height, lifter number, and mill speed. Moreover, the changes in the torque and power consumption of a ball mill can be effectively explained using two important factors: lifter and particle area ratio.

3/30/2013· Ball mill torque curve:- Cascading point is at 60°, independent of speed. Ball Mill Speed,Mill Speed Influence,Grinding Efficiency For Ball Mill Speed, Influence of Mill by multiplying the torque on the driving shaft slope is not affected by the mill speed as the curves are mostly

5/12/2000· Abstract: The time has come to re-think the approach to mill drive motors because of the growth in size of newer ball mills, the starting torque restrictions of some of the newer mill drive configurations, and the softness of some utility services. This paper looks at the serviceability and economics of five different mill motor options to meet these restraints.

After the speeds of the driving disc and the driven disc are synchronized, the load torque of the motor is equal to the load torque of the ball mill. Although the theoretical friction torque still increases, as shown by the solid line in the Figure 7, the friction torque that the air clutch transmission is equal to the load torque of the ball mill. In addition, with the rotational speed and angle of the barrel increase, the material begins to cascade and fall, which causes the load torque

Numerous torque mill tests, in addition to the growing plant data base compiled to date, show that media charging near the size that provides highest ball mill grinding efficiency provides a degree of robustness with changing ore grindability. It is rare that the media is incapable of breaking the largest particles as they become tougher.

Motor selection can become still more complex when loads do not exhibit a single speed-torque curve, or for which torque at full speed varies throughout each revolution. One example is the large ball mill used in minerals processing.

The 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

the mill at any time during the run. The torque of the mill was measured by strain gauges attached to the drive shaft. The results of the milling experiments were then correlated with the motion of the grinding media. It was established that changes in the liner design can cause variations of up to 40%

The stall torque,, represents the point on the graph at which the torque is a maximum, but the shaft is not rotating. The no load speed,, is the maximum output speed of the motor (when no torque is applied to the output shaft). The curve is then approximated by connecting these two points with a line, whose equation can be written in terms of

The problem with ball mills vs a simulation like ETAP is that the mill initially is a torque load that is dependent on rotation angle until the charge start to tumble. ETAP only simulates the torque vs speed as a curve. Best bet would be to use a torque peak right off zero speed and then drop down to a more constant torque type of load curve.

## ball mill torque speed curve worldcrushers

3/30/2013· Ball mill torque curve:- Cascading point is at 60°, independent of speed. Ball Mill Speed,Mill Speed Influence,Grinding Efficiency For Ball Mill Speed, Influence of Mill by multiplying the torque on the driving shaft slope is not affected by the mill speed as the curves are mostly

## Cone Crusher Ball Mill Torque Speed Curve Crusher Mills

ball mill torque speed curve mexico Mining and Construction Simons Cone Crusher Torque Speed Curve 152 Views. Mexico. fl vertical roller mills. FL ball mill torque speed curve “EXPERIENCE WITH SYNCHRONOUS

## Jaw Crusher Ball Mill Torque Speed Curve Crusher Mills

ball mill speed torque curve stone crusher machine Ciros crushing equipment is designed to achieve maximum productivity and high reduction ratio. From large primary jaw crusher and impact crusher

## Effect of lifters and mill speed on particle behaviour

5/1/2017· At N l = 12 (Fig. 19b), the distance between each torque curve becomes small and shows the same changing trend in comparison to that at N l = 24, which is roughly and directly proportional to the rotation rate when the ball mill works at a low speed and is inversely proportional to the rotation rate when the ball mill works at a high speed.

## A Study of Charge Motion in Rotary Mills, with Particular

correct form of the torque curve when the simple torque-arm method of calculation was used. The amount of slip within the charge is independent of the liner r Vector from centre of mill to centre of ball r 0 R a s r.cos~ ~ Vector directed from tip to base of lifter bar s Linear velocity of ball up lifter face

## Frequency domain characterization of torque in tumbling

1/1/2018· Torque in tumbling ball mills For a specific load and operating conditions, the torque appearing in a tumbling ball mill is a highly variable magnitude in the time domain. This fact is due to the operating principle of ball mills, which is based in the elevation process of balls and material from the toe region to the shoulder region of the drum.

## Effect of lifters and mill speed on particle behaviour

5/1/2017· The torque of liners and baffles are affected by lifter height, lifter number, and mill speed. Moreover, the changes in the torque and power consumption of a ball mill can be effectively explained using two important factors: lifter and particle area ratio.

## ball mill torque speed curve worldcrushers

3/30/2013· Ball mill torque curve:- Cascading point is at 60°, independent of speed. Ball Mill Speed,Mill Speed Influence,Grinding Efficiency For Ball Mill Speed, Influence of Mill by multiplying the torque on the driving shaft slope is not affected by the mill speed as the curves are mostly

## Ball mill drive motor choices IEEE Conference Publication

5/12/2000· Abstract: The time has come to re-think the approach to mill drive motors because of the growth in size of newer ball mills, the starting torque restrictions of some of the newer mill drive configurations, and the softness of some utility services. This paper looks at the serviceability and economics of five different mill motor options to meet these restraints.

## Electromechanical Dynamic Behaviour and Start-Up

After the speeds of the driving disc and the driven disc are synchronized, the load torque of the motor is equal to the load torque of the ball mill. Although the theoretical friction torque still increases, as shown by the solid line in the Figure 7, the friction torque that the air clutch transmission is equal to the load torque of the ball mill. In addition, with the rotational speed and angle of the barrel increase, the material begins to cascade and fall, which causes the load torque

## Ball mill media optimization through functional

Numerous torque mill tests, in addition to the growing plant data base compiled to date, show that media charging near the size that provides highest ball mill grinding efficiency provides a degree of robustness with changing ore grindability. It is rare that the media is incapable of breaking the largest particles as they become tougher.

## June 2012 Understanding the load speed-torque curve

Motor selection can become still more complex when loads do not exhibit a single speed-torque curve, or for which torque at full speed varies throughout each revolution. One example is the large ball mill used in minerals processing.

## Ball Mill Design/Power Calculation

The 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

## A Study of Charge Motion in Rotary Mills, with Particular

the mill at any time during the run. The torque of the mill was measured by strain gauges attached to the drive shaft. The results of the milling experiments were then correlated with the motion of the grinding media. It was established that changes in the liner design can cause variations of up to 40%

## D.C. Motor Torque/Speed Curve Tutorial:::Understanding

The stall torque,, represents the point on the graph at which the torque is a maximum, but the shaft is not rotating. The no load speed,, is the maximum output speed of the motor (when no torque is applied to the output shaft). The curve is then approximated by connecting these two points with a line, whose equation can be written in terms of

## ETAP Motor Starting Study for 600kW Ball Mill Electric

The problem with ball mills vs a simulation like ETAP is that the mill initially is a torque load that is dependent on rotation angle until the charge start to tumble. ETAP only simulates the torque vs speed as a curve. Best bet would be to use a torque peak right off zero speed and then drop down to a more constant torque type of load curve.