Why we choose vertical roller mill rather than ball mill?

vertical mill has the high R&D and manufacturing requirements, it is an ideal large-scale grinding equipment, high production efficiency ,but ball mill has lower energy consumption efficiency , has a trend to be replaced by vertical mill .Specific features:

1, using the local limited material bed crushing principle, to improve the efficiency of the grinding time, the system unit power consumption than the loop flow ball (tube) mill save 20% --30%.

2, ventilation drying capacity, make full use of the kiln exhaust gas in the water mill drying of raw meal can be as high as 60% or more, not like as ball mill, mill with specifications and yield increases occurred drying reduced ability to defects, it did not like the roller press, as only the limitations of dry grinding material.

3, the grinding size allowed up to 80mm, to relax the expected size crusher, crushing saving electrical energy consumption. Because the interlayer material bed crushing in feed size to the roller diameter of less than 5%, still effectively crushing operations, rather than a ball mill or roller press as sensitive to changes in feed size.

4, running a small operation noise, sound intensity from the mill is 80dB at 1m or less, much lower than the ball mill.

5, five units focus broken, grinding, drying, separator and pneumatic conveying in one operation, less equipment, the system is simple, small footprint, the host can be placed in the open air, no plant, construction and installation costs lower than those of a ball mill lot.

6, the material in the mill residence time is short, the response to the ratio of raw material or fineness of rapid change, easy to adjust production control. Less over-grinding phenomenon, raw material size distribution tends to be uniform, favorable calcination. And after changing ingredients, milling system response time is generally 15min, while producing a large amount of raw material transition.

7, adaptability to various properties of the raw material is strong, regardless of their grindability, abrasion resistance, the moisture content, particle size or fineness of the material is particularly high or extremely low, for a large range of variation can be applied.

8, metal wear less, roller and disc lining life of up to 8000--12000h, annual operating rate of up to 85%.

9, the system less leakage, less than half of the milling system can reduce the exhaust gas processing ESP specifications, investment and power consumption.

10, to adapt to large-scale cement equipment, not less than 8000t / d production line can use a kiln a mill configuration, simplified process flow and plant layout, flow circle milling would be difficult to do this.