To achieve the fineness of 400 meshes, the circulation velocity of 4 rollers vertical mill should be usually controlled in the range of 40-80m/s.
The working principle of the vertical mill is that the material is crushed into pieces by the rollers in the center of grinding table. One of the obvious characteristics of 4 rollers vertical mill is that the grinding process of the material adopts layer grinding principle, which cannot cause the repeated rolling and the final product is in good shape. The material crushed enters into the concentrator with the circulation airflow driven by the centrifugal force of the grinding table to be graded according to the fineness. This process is the key to guarantee high quality ultrafine powder production. The intelligent regulation about final product fineness can be achieved by controlling the air volume and speed of the vertical mill.
From the perspective of equipment structure, CRM3604 raw material vertical mill is actually a kind of air swept mill. After the grinding process is over, the qualified materials enter into the collector with the airflow driven by air speed of quantity system and become the finished powder. The unqualified materials will fall into the grinding chamber again under the gravity to accept the secondary classify. Therefore, the adjustment of air volume and speed is the key factor that determines the percentage of qualified materials. On the one hand, the adjustment of air volume can control the size of particles; on the other hand it has direct effect on the air speed of circulation airflow and the thickness of the layer. To achieve the fineness of 400 meshes, the circulation velocity of 4 rollers vertical mill should be usually controlled in the range of 40-80m/s.
The inner circulation velocity of vertical mil and the discharge hole have different operation principles. The speed of the discharge hole is often controlled above 20m/s, which is to improve the production efficiency of the discharging. At the same time, the installation of raw material vertical mill should has suitable inclined angle to avoid the feeding speed, which may happen when it is put horizontally. There are many factors that can affect the fineness of the final products, the air volume and speed is one of the factors. There are many accesses to inquiry imported brand raw material vertical mill on the grinding mill special website. The users can learn much about the working principle and the latest technology of vertical mill. The ultrafine grinding process of vertical mill to the raw material is so far the highest efficient processing solution in domestic. In the production line, the technicians may regulate the air volume of vertical mill to help operate the equipment stably, and strive to achieve least discharge of slag, low consumption and the highest passing rate.
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