The structure of the ball mill itself is also an important aspect that affects its grinding ability. It includes the setting of the length of each bin in the mill, the form of the liner, the type of the bulkhead, the through hole rate, and the layout.

(1) The length of each bin in the mill.

At present, the lengths of rough grinding bins of various specifications of the ball mill are mostly designed according to the large particle size of 25 mm for feeding, so the length of coarse grinding bins is generally relatively long. With the introduction of the pre-crushing process, the size of the material entering the mill is significantly reduced, and the pressure in the mill is greatly reduced. Therefore, if the original length of the warehouse is still maintained, the coarse grinding capacity will be excessive, and the fine grinding capacity will be tight. Unbalanced phenomenon. In order to match the capacities of the warehouses, many manufacturers have taken appropriate measures to shorten the length of the coarse grinding bins and increase the length of the fine grinding bins, and achieved good results.

(2) Improvement of the partition board.

In recent years, the development of high-precision grinding has promoted the improvement of the silo panel, which in addition to its traditional functions such as blocking large blocks, preventing the grinding of bodies, ensuring ventilation, and forced feeding, also has a new classification function. For example, with a double-layered silo plate with a sizing screen, in addition to having a mandatory feeding function, coarse particles with a larger particle size can be returned to a coarse grinding granary for further grinding. As a result of this classification, the stability of the granularity of the material entering the fine-grinding bin is greatly enhanced, and the existence of coarse particles can be avoided to a considerable extent. At the same time, it is of positive significance for stabilizing the system's cyclic loading rate and stabilizing the working status of the entire system. .

(3) Use of new liners.

Mill liners come in a wide variety of forms and have different effects and effects. Among them, step liners are widely used as liners in cement mill, and its Archimedes spiral curved surface ensures mill operation. During the process, the grinding body can be lifted to a certain height in a balanced manner, so as to increase the impact of smashing the material. However, the lining still cannot overcome the defect that the steel ball is in point contact with it. The emergence of new liners such as rounded square liners, angle spiral liners, and groove liners makes the fit between the liner and the grinding body more reasonable, and there is a layer of material that is not easily separated from the steel ball and the liner, making full use of it. With their sliding friction between each other, the grinding efficiency increases. The angle spiral lining plate is to change the movement law of the grinding body in the grinding mill, so that the detachment angle of the grinding body has variability, to enhance the cross penetration of the grinding body and the material and to fully contact the grinding, and the steel balls are automatically sorted to increase the powder. Grinding efficiency. On the basis of the annular groove activation liner, a new type of energy-saving lining plate—a ring groove and a double curved surface lining plate—has been researched and developed. The lining plate makes the lifting of the grinding body more reasonable, and the contact friction between the grinding body and the material has more opportunities. The output can be further increased by 10% to 18%, and the power consumption can be reduced by 10% to 20%.

CHAENG Machinery Co. main products: Vertical Roller Grinding Mill, Ball Mill, Rotary Kiln , Steel Castings, Cement making machines, GGBS Plant.