Sage-Tips

Which is more efficient ball mill or rod mill?

The processing capacity of rod mill is greater than that of the ball mill when the product size is 1-3mm in the coarse grinding process, while the grinding effect of ball mill is greater than that of the rod mill when the product size is less than 0.5mm in the fine grinding process.

For what purpose the ball mill is used?

Ball mills are commonly used for crushing and grinding the materials into an extremely fine form. The ball mill contains a hollow cylindrical shell that rotates about its axis. This cylinder is filled with balls that are made of stainless steel or rubber to the material contained in it.

What is the difference between ball mill and tube mill?

Tube Mills consist of revolving cylinders, the interior of which is perfectly plain. They differ from ball mills essentially in having the inlet for ore at one end and the outlet at the other, and in the absence of provision in the machine itself for the return of uncrushed material (oversize).

What is rod mill?

Definition of rod mill 1 : a mill that produces rods of steel or other metal. 2 : a pulverizing machine that uses loose iron rods as the grinding media — compare ball mill.

What is the operating speed of rod mill in critical speed?

Rod mills speed should be limited to a maximum of 70\% of critical speed and preferably should be in the 60 to 68 percent critical speed range. Pebble mills are usually run at speeds between 75 and 85 percent of critical speed.

What is a rod mill?

Why the speed of ball mill is critical?

Critical Speed of a Ball Mill (ƞc): As the product size becomes finer, the capacity of the mill reduces and the energy requirement increases. As the speed of the mill exceeds ηc (i.e. mill is centrifuging), the size reduction capacity decreases.

Which one of the milling process is best suitable?

Down milling is always the preferred method wherever the machine tool, fixture and workpiece will allow. In peripheral down milling, the chip thickness will decrease from the start of cut, gradually reaching zero at the end of cut.

What is the difference between a rod mill and ball mill?

Because of this, the rod mill can effectively reduce 1″ feed size to 10 mesh or finer in open circuit. The voids (or interstitial space) within a rod load are approximately half those in a ball mill grinding load.

How does the rod mill reduce the feed size?

The average particle is subjected to an action similar to many sets of rolls in series, before it is discharged. Because of this, the rod mill can effectively reduce 1″ feed size to 10 mesh or finer in open circuit.

What is the working principle of ball mill?

The working principle of ball mill and rod mill machine is similar, too. That is, the cylinder drives the movement of the grinding medium (lifting the grinding medium to a certain height then dropping).

What kind of rod mill can grind coarsely?

Center and side discharge rod mill can grind ores coarsely because of its structure. This kind of rod mill can be used for wet grinding and dry grinding. ” A rod mill is recommended if we want to properly grind large grains, because the ball mill will not attack them as well as rod mills will.” ①