The Ball Mill is the key equipment for the material to be crushed and then crushed. This type of grinding machine is to put a certain number of steel balls in its barrel as grinding medium.
It is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, black and non-ferrous metal beneficiation and glass ceramics and other production industries.
Dry or wet grinding of various ores and other grindable materials. Ball mills are suitable for grinding various ores and other materials. They are widely used in mineral processing, building materials and chemical industries. They can be divided into dry and wet grinding methods. According to the different discharge methods, it can be divided into two types: lattice type and overflow type.
Working Principle
The ball mill is composed of a horizontal cylinder, a hollow shaft for feeding and discharging materials, and a grinding head. The cylinder is a long cylinder, and the cylinder is equipped with a grinding body. Generally, it is a steel ball, which is loaded into the cylinder according to different diameters and a certain proportion, and the grinding body can also be made of steel.
It is selected according to the particle size of the grinding material. The material is loaded into the barrel by the hollow shaft at the feed end of the ball mill. When the ball mill barrel rotates, the grinding body is attached to the barrel liner due to the action of inertia, centrifugal force and frictional force. It is taken away by the cylinder, and when it is brought to a certain height, it is thrown down due to its own gravity, and the falling grinding body crushes the material in the cylinder like a projectile.
The material enters the first chamber of the mill spirally and evenly from the feeding device through the feeding hollow shaft. There is a stepped lining plate or a corrugated lining plate in the chamber, and various specifications of steel balls are installed inside. The rotation of the cylinder generates centrifugal force to bring the steel balls to a certain level. When it falls after the height, it has a heavy impact and grinding effect on the material. After the material reaches the rough grinding in the first warehouse, it enters the second warehouse through the single-layer partition board. The warehouse is inlaid with a flat lining plate and has steel balls to further grind the material. The powder is discharged through the discharge grate to complete the grinding operation.
During the rotation of the cylinder, the grinding body also slips off. During the sliding process, the material is subjected to a grinding action. In order to effectively utilize the grinding action, when grinding the material with a larger particle size, the grinding body is placed on the grinding body. It is divided into two sections by the partition board, that is, it becomes a double warehouse. When the material enters the first warehouse, it is crushed by steel balls. When the material enters the second warehouse, the steel section grinds the material, and the qualified material is hollowed out from the discharge end. Shaft discharge, when grinding materials with small feed particles, such as No. 2 sand slag, coarse fly ash, the barrel of the mill can be a single-silo mill without partitions, and the grinding body can also be made of steel.
The raw materials are fed into the hollow cylinder through the hollow journal for grinding, and the cylinder is equipped with grinding media of various diameters (steel balls, steel bars or gravel, etc.). When the cylinder rotates at a certain speed around the horizontal axis, under the action of centrifugal force and frictional force, the medium and raw materials in the cylinder will leave the cylinder when the gravity of the cylinder is greater than the centrifugal force as the cylinder reaches a certain height. The inner wall is projected to fall or roll down, breaking the ore due to the force of the impact. At the same time, during the rotation of the mill, the sliding movement of the grinding media between each other also produces a grinding effect on the raw materials. The ground material is discharged through the hollow journal.
Do you have any specific questions about the Ball Mills? Contact Yogie! Our sales engineers will work with you from start to finish to ensure that your project is completed to your requirements.
Also, Yogie is a professional manufacturer for Mining equipment, CNC Machine tools, and Machinery parts for over 20years.
