The ball mill developed by Cronus has a wide range of applications. It can grind more than 100 kinds of ores such as limestone, calcite, calcium carbonate, dolomite, barite, talc, gypsum, quartz, bentonite, etc. It can process various materials such as calcium carbonate crushing, gypsum powder processing, power plant desulfurization, non-metallic ore powder making and coal powder preparation. Successful cases include southern non-metallic ore processing and thermal power plant limestone desulfurization.
Working Principle of Ball Mill
According to the particle size of the grinding material, the material is selected and loaded into the cylinder through the hollow shaft at the feeding end of the ball mill. When the cylinder of the ball mill rotates, the grinding body is attached to the cylinder lining due to inertia, centrifugal force, and friction, and is carried away by the cylinder. When it is brought to a certain height, it is thrown down due to its own gravity. The falling grinding body crushes the material in the cylinder like a projectile.
The material is fed into the first bin of the mill evenly through the feeding hollow shaft spiral from the feeding device. The bin has a stepped lining or corrugated lining, which contains steel balls of various specifications. The centrifugal force generated by the rotation of the cylinder brings the steel balls to a certain height and then falls, which produces a heavy impact and grinding effect on the material. After the material is roughly ground in the first bin, it enters the second bin through a single-layer partition board. The bin is inlaid with a flat lining board and contains steel balls to further grind the material. The powder is discharged through the discharging grate plate to complete the grinding operation.
During the rotation of the cylinder, the grinding body also slides down, and the material is ground during the sliding process. In order to effectively utilize the grinding effect, when grinding materials with large particle size, such as 20 mesh, the grinding body cylinder is divided into two sections by a partition plate, that is, a double bin. When the material enters the first bin, it is crushed by steel balls. When the material enters the second bin, the steel section grinds the material. The qualified ground material is discharged from the hollow shaft at the discharge end. When grinding materials with small feed particles, such as sand No. 2 slag and coarse fly ash, the mill cylinder can be made of a single bin cylinder mill without a partition, and the grinding body can also be made of steel sections.
The raw material is fed into the hollow cylinder through the hollow shaft neck for grinding. The cylinder is filled with grinding media of various diameters (steel balls, steel rods or gravel, etc.). When the cylinder rotates around the horizontal axis at a certain speed, the medium and raw materials in the cylinder, under the action of centrifugal force and friction, will break away from the inner wall of the cylinder and fall or roll down when their own gravity is greater than the centrifugal force as the cylinder reaches a certain height, and the ore will be crushed due to the impact force. 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 materials are discharged through the hollow shaft neck.
