Vertical Roller Mill for Cement Industry

With the development of social industrial production needs, vertical mill is more and more widely used in the cement grinding industry, and gradually replace the traditional ball mill.
The working principle of the traditional ball mill is that the material enters the shaft body from the feed end hollow shaft of the ball mill. When the ball mill is rotated, the grinding body is affixed by the action of inertia and centrifugal force, the cylinder on the liner is taken away, and when it is brought to a certain height, it is dropped due to its own gravity and the falling abrasive is crushed like a projectile.
And now vertical roller mill is widely used working principle and the traditional ball mill is very different, vertical roller mill is the material down tube to the central disc, constant speed rotation of the disc with the role of centrifugal force to the raw material outward evenly dispersed, paved to form a certain thickness of the material bed, slag material at the same time by the grinding wheel on a number of roller rolling, and was crushed. In the continuous driving of the centrifugal force under the slag material continue to move to the outer edge of the disc, when leaving the disc material encountered through the wind ring into the grinding of hot gas and then rise, the mill through the middle of the shell into the separator, where the process of slag powder material and hot gas were fully heat exchange, the water was quickly evaporated. The finder controls the finished fineness of the roller mill outlet, the particles larger than the specified size are separated, and fall back to the disc to meet the fineness requirements of the material through the selected grade into the finished product warehouse. And this working principle is doomed in this no smoke of the grinding war, the mill will become the final winner.
First of all, from the effect of energy-saving, vertical roller mill is the usage of advanced material grinding principle, the system power consumption than the ball mill energy saving 20% -30%, with the increase in raw material composition, energy saving effect is more significant.
Secondly, from the view of environmental point, when vertical roller mill works, roller and the disc is not direct contact when they work, no metal impact, the noise is lower than the ball mill 20-25 dB, and vertical grinding system using fully sealed negative pressure operation, no dust, production environment clean. And the gravity used by the ball mill to crack the material produced by the noise is difficult to avoid.
Finally, from the view of area, vertical roller mill set crushing, drying, grinding, powder, transportation as a whole, no need to separate drying, powder, upgrade and other equipment, workshop area only 70% of the ball mill system %, space accounted for only 50-60%.
In addition to the above three points, the vertical roller mill also has a lot of advantages that ball mill cannot match, such as drying capacity, low wear, grinding products stability and so on. These are achieved through the work principle of vertical mill.