Do you know ball mill grinding theory

We all know that the ball mill is the key equipment for crushing in industrial production. It mainly relies on a certain amount of steel balls in the cylinder as the grinding medium to crush the object. But why is it possible to grind objects through these steel balls instead of blades? What is the principle?

The grinding operation is carried out in the body of the ball mill. After the grinding of the cylinder is brought to a certain height with the rotation of the cylinder, the medium falls due to its own weight, and the ore contained in the cylinder is subjected to the violent impact of the medium. On the other hand, due to the revolution and rotation of the grinding medium in the cylinder body along the axial center of the cylinder, the ore is squeezed and grounded between the grinding medium and the contact area with the cylinder body, thereby grinding the ore. The ball mill steel ball (grinding medium) is brought up and raised to a certain height when the cylinder rotates. Due to the gravity of the steel ball itself, it finally falls along a certain orbit. The steel ball in the area is subjected to two kinds of forces: one is the force applied to the steel ball from the tangential direction when rotating; the other is the force opposite to the above force with respect to the diameter of the steel ball, the force of this force The production is caused by the downward sliding of the steel ball itself due to its own weight. The above two forces, for the steel ball will constitute a pair of couples, because the steel ball is squeezed in the middle of the cylinder and the adjacent steel ball, so the couple will cause friction between the steel balls of different sizes, steel When the ball rotates in the area with the axis of the cylinder, it will drop from the top and bottom in the area, and it will have a strong impact on the ore in the cylinder and break the ore. It can be said that the ore in the mill barrel is mainly ground by the action of abrasion, impact and pressing force.

Understand its grinding theory, in order to better apply to actual production, and improve production efficiency.

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