HORIZONTAL/ TUBE / BALL MILL
A ball mill is a type of grinder used to grind and blend materials for use in various types of industries. A ball mill works on the principle of impact: size reduction is done by impact as the balls drop from near the top of the shell.
A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the shell may be either horizontal or at a small angle to the horizontal. it is partially filled with balls/ Grinding Media. The inner surface of the cylindrical shell is usually lined with an abrasion-resistant material such as steel or rubber.
In case of continuously operated ball mill, the material to be ground is fed from the feed end/ left and the product is discharged through to the right/ discharge end. As the shell rotates, the balls are lifted up on the rising side of the shell and then they cascade down (or drop down on to the feed), from near the top of the shell. In doing so, the solid particles in between the balls are ground and reduced in size by impact.
Normally, cement (clinker) mills are 2 chamber (in some case 3 chamber) (where as Coal/ Raw/ Limestone mills are normally mono chamber), and diaphragms separate one chamber from another, filtering the size of material to the next chamber. The Diaphragms are fitted onto a sturdy structure known as Diaphragm Frame. The other products used are Liners and Grinding Balls, which are in various designs, grades based on various requirements and principals operating.