# The basic principle of ore grinding process

posted by .

Lifting height and motion trail of projectile action of ore grinding medium depend on rotating speed of grinding machine and the filled amount of ore grinding medium. Both the low speed and high speed will have direct influence on the performance of grinding machine. The grinding medium moving condition in three kinds of different working speed are:

1. Grinding machine running in a low speed(pic.a)
The rotating speed is not high so the lifting height of grinding medium is low and the grinding medium will fall to the bottom of barrel along to their own inclined plane for circulating. The medium is in spilling state and has smaller impact. The abrasive and extrusion action are formed by rolling action among mediums. Ball has less grinding action to materials.

2£®Grinding machine running in a normal speed(pic.b)
The rotating speed is higher so the lifting height of grinding medium is high and the grinding medium will be up to a certain height with barrel circular motion, then leave the barrel in a certain velocity and do fall down movement along parabolic path. At this time, the grinding medium has high impact and the abrasive and extrusion action will get sufficient exertion. The materials are ground in the most intense level. Most of grinding machines are working in such a ore grinding condition.

3. Centrifugal operation(pic.c)
When the rotating speed of ore grinding machine is enhanced to a limit numerical value, all the grinding medium will do concentric rotation with the barrel and will not fall down, which will be called centrifugal operation. When the medium produces centrifugal operation, the ore grinding action will be lost in theory. So the grinding machine should work in the rotation speed which is below centrifugal operation. Get rotary kiln,ball mill,ball mill

## Similar Questions

1. ### phy

A grinding wheel 0.62 m in diameter rotates at 2400 rpm. (a) Calculate its angular velocity in rad/s. rad/s (b) What are the linear speed and acceleration of a point on the edge of the grinding wheel?
2. ### phy

A grinding wheel 0.62 m in diameter rotates at 2400 rpm. (a) Calculate its angular velocity in rad/s. rad/s (b) What are the linear speed and acceleration of a point on the edge of the grinding wheel?
3. ### physics

A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?
4. ### physics

A grinding wheel 0.40 m in diameter rotates at 2200 rpm. What is the acceleration of a point on the edge of the grinding wheel?
5. ### physics

A grinding wheel 0.28 m in diameter rotates at 2400 rpm. What is the acceleration of a point on the edge of the grinding wheel?
6. ### Physic

An electric motor rotating a workshop grinding wheel at a rate of 114 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.10 rad/s2. (a) How long does it take for the grinding wheel …
7. ### Medium Speed wet milling machine and the relations

So far, the world's medium-speed milling machines are dry law. Hot air carrier that is, separation, sorting products. Therefore in need of a massive and complicated: medium heat generator, fans, vents Central, separator , explosion-proof …
8. ### The defects of ball mill

The Ball Mill faults: (1) work efficiency is low, the power consumption unit. (2) the ball mill barrel rotational speed is low (about 15 ~ 27 r/min), if you use ordinary motor that. The average all need equipped with expensive reducer. …
9. ### The defects of ball mill

The Ball Mill faults: (1) work efficiency is low, the power consumption unit. (2) the ball mill barrel rotational speed is low (about 15 ~ 27 r/min), if you use ordinary motor that. The average all need equipped with expensive reducer. …
10. ### Direct way to improve yield of ball mill

The Ball Mill as a general grinding equipment, is widely used in dressing, building materials and chemical industry, ball mill can be divided into dry and wet type two kinds of grinding way. According to the row of ore in different …

More Similar Questions