How to determine the ball grinding ball parts in the ball mill

　　Many manufacturers and insipsers have recently reacted such a problem. After they have used the ball mill, most of them because the mill is loose, and the grinding ball is loose. They want to ask before this failure What is precautionary, it is mainly reflected in which the main failure form is mainly reflected?

　　In the material, the force given by the liner, the mutual extrusion of the grinding ball is grinded. The main mechanism of ball wear is:

　　(1) cutting and chiseling wear. The surface force of the grinding ball can be broken down into a normal force force and tangent force, and the sharp material (abrasive particles) relative to the grinding ball, in the method of embedding the surface under the action of the normal force, and the tangent force pushes the surface of the abrasive. . Low hardness abrasive grains cause shallow scratches on the surface of the grinding ball, and the high hardness abrasive particles cause cutting grooves. Metals in the scratches and cutting grooves are plastic deformation stacked on both sides and the front section. The high strain rate causes the metal internal position of the metal that has occurred, forming a cytoplad structure, and the properties are harder, and then repeatedly rolled, produce strain fatigue cracks, and the properties are hard to become brittle, and then repeatedly rolled, generated Strain fatigue cracks, expanded to the surface, resulting in frosting. When the grinding of the grinding ball is very large, the chiseling effect occurs, forming a chisel pit, the metal is directly premature or plasticity, and ultimately forms iron filings due to turning fatigue;

　　(2) fatigue wear . Grinding balls are repeatedly impacted, and they are repeatedly impacted, and they are repeatedly impact, and they are distressed with each other. Under the pressure of alternation, the Hz contact stress caused by the alternation pressure and shear force. In the sub-surface layer of the material produce maximum alternating cutting stress, the edge of the contact area produces peak tensile stress, resulting in a brittle phase of the sub-plane, causing fatigue, crack expansion and interleaving, and ultimately make the grinding spheroid epidermis and wear . If the crack is generated in a deepest portion, the brittle phase and the defect are extended to the inside to form a larger depth crack. The crack will be incorporated with the surface, which will cause the grinding surface to fall off. Fatigue wear of the grinding surface;

　　(3) brittle wear. In the wet ball mill used in the mine, the wear medium (belonging to the electrolyte solution) and the wear working condition acts on the surface of the material, and corrosion wear occurs. The consumption of the wet mill grinding body reaches 5 to 7 times the dry type. The loss rate of materials under the corrosion wear mechanism is much higher than that of corrosion and wear, and the loss rate of the material is due to its material. Corrosion damageThe mechanical properties of the surface make the material are accelerated, and wear continuously generate "new" material surface, and improves the rate of corrosion.