1、Characteristics of FRM vertical mill
1. The grinding process is simple, the layout is compact, and the system has a high operating rate. It integrates crushing, drying, grinding, and graded conveying, occupying an area of about 50% of the ball milling system. It can also be arranged outdoors, reducing construction costs by about 70%.
2. The particle size of the material entering the mill is large, reaching about 5% of the diameter of the grinding roller, usually 40-100mm. Therefore, large and medium-sized vertical mills can avoid secondary crushing.
3. The grinding efficiency is high and the power consumption is low. The mill adopts a drum shaped grinding roller bowl shaped grinding disc and the material bed extrusion crushing principle. The material is subjected to rolling, shearing, and impact inside the mill; The airflow inside the mill can timely carry out the finely ground materials, avoiding over grinding. The material generally stays in the mill for 2-4 minutes, and the grinding efficiency is 165% of that of the ball mill. The power consumption can be reduced by about 30%.
4. Less metal wear: Due to the fact that the FRM vertical mill does not directly contact the grinding roller with the grinding disc during operation, and the grinding roller and lining plate are made of high-quality wear-resistant materials, the service life is long and the wear is minimal.
5. The grinding roller sleeve can be flipped over for use, extending the service life of wear-resistant materials; And the grinding of cement raw materials, roller sleeves and lining plates have a service life of over 8000 hours, and the operating rate can reach 95%.
6. The grinding roller can be lifted and lowered by itself to achieve no-load start-up.
7. The use of a grinding roller limit device can ensure a certain gap between the grinding roller and the grinding disc, avoiding severe vibration caused by direct contact between the two during material breakage or pressure overload.
8. Easy maintenance, the grinding roller can be flipped out of the machine using a hydraulic device, with a large operating space and high efficiency
Easy to repair.
9. The grinder is easy to operate, runs smoothly, has low vibration, and low noise.
10. The FRM vertical mill adopts integral sealing, and the system operates under negative pressure without dust overflow, ensuring a clean working environment.
11. Strict control of material fineness, sensitive adjustment, high equipment operation rate, and minimal downtime due to malfunctions.
12. The grinding roller adopts five sealing devices with good sealing performance. Large vertical mills use thin oil to forcibly lubricate and clean the bearings, extending the service life of the bearings.
13. The high-pressure oil from the lubrication station forcibly cleans and lubricates the reducer components, and bears the pressure of the grinding rollers to ensure the normal operation of the reducer.
14. The operating system and hydraulic system can achieve centralized operation and remote control.
2、 Classification of FRM vertical mills
FRM vertical mills are divided into raw material mills, slag mills, cement mills, and coal mills.
3、 Typical Grinding System Process Flow Diagram
 

 

 

4、 FRM Vertical Grinding Structure Diagram