As a piece of common grinding machinery in cement plants, ball mills have a simple function in the grinding process and continuous working performance. The commercial ball mill system is divided into closed-circuit grinding and open-circuit grinding in the process. Many industrialists have queries about these two systems while choosing.
Here are the differences between the open and closed circuit ball mill that you must know:
Open-circuit grinding system:
Open circuit ball mill manufacturers use this grinding process where the material is passed through the mill once and it becomes the product.
The benefit of the open circuit system includes less investment, a simple process, less equipment, maintenance, and convenient operation.
Disadvantages: All materials reach the product fineness before they are milled. Hence, when the size of the product is required to be fine will be over-crushed, and a cushiony layer is formed in the mill, stopping the coarse material from more grinding, and sometimes the phenomenon of fine powder balling happens. Open circuit ball mill manufacturers experience a decrease in grinding efficiency resulting in low output and high power consumption.
Closed-circuit grinding system:
When the material is cleared from the grinding section, the product is chosen by the grading tools. The uneven material is returned to the mill for regrinding to attain the required cement quality. The closed-circuit system is installed opposite the open circuit system. The closed-circuit system decreases the chances of over-grinding at the same time, the final material loses part of the heat after transmission and grading. When the uneven powder is returned to the grinding process, the temperature in the mill is reduced, which is helpful to raise the mill output and decrease the grinding power intake. Usually, the closed-circuit system increases the final product by 15-25% more than the open-circuit system, and the product fineness is controlled by altering the classification equipment, which is more convenient.
Grinding size
The particle delivery by the open circuit ball mill manufacturers is wider, whereas the particle configuration of the closed-circuit system is more uniform, with fewer uneven particles and less fine powder. The residue calcination speed and the final free calcium absorption are mostly determined by the uneven particles in the raw ball meal. Therefore, when the particles are above 200um which is less than 1.5%, the raw products of the closed-circuit system are appropriately relaxed to rise the mill output and decrease power usage for grinding.
With the implementation of energy-saving and emission reduction plans, the grinding technology is continuously updated. Therefore, when choosing the closed or open circuit ball mill manufacturers choose according to your own needs, so as to better serve your company. Create economic benefits!