A Closer Look at Raymond Mill and Vertical Roller Mill: Differences in Operation and Performance
Raymond mill and vertical roller mill are two common grinding equipment in mines and other industries. They are both widely used in the grinding of raw materials. However, they have different working principles and have different performances in operation. This article will take a closer look at the differences between Raymond mill and vertical roller mill in terms of operation and performance.
Firstly, let’s start with the operation of Raymond mill. Raymond mill uses a vertical structure with a small footprint. It has a strong set of complete sets of equipment, which can be used for various types of non-metallic minerals and Mohs hardness below 7 and humidity below 6%. It has high grinding efficiency, low power consumption, large feeding granularity, and adjustable product fineness.
Raymond mill works through the rotation of the central spindle, driven by a motor. The grinding roller oscillates back and forth under the action of centrifugal force, and the grinding ring is pressed tightly on the grinding roller. The raw materials are fed into the grinding chamber through the feeding device and are ground into powder under the action of the grinding roller and grinding ring. The fine powder after grinding is taken away by the airflow, and the coarse powder is re-grinded in the grinding chamber.
On the other hand, vertical roller mill is a large-scale grinding equipment. It combines crushing, drying, grinding, grading, and conveying into one, with high grinding efficiency and low energy consumption. It can grind various materials such as limestone, calcite, marble, barite, dolomite, potassium feldspar, bentonite, gypsum, and other non-metallic ores with a Mohs hardness below 7 and a moisture content below 6%.
Vertical roller mill works by grinding materials through the mill ring roll gap, which crushes materials under the action of centrifugal force. The grinding roller rotates around the center axis and swings horizontally through the grinding roller shaft hoop. Under the action of centrifugal force, the grinding roller swings outward, pressing the grinding ring. The raw materials are continuously fed into the grinding chamber from the feeding hopper, and after being ground, they are transported by the airflow to the classifier. The qualified fine powder enters the dust collector with the airflow, and the coarse powder falls into the grinding chamber for re-grinding.
In terms of performance, Raymond mill and vertical roller mill have their own advantages and disadvantages. Raymond mill has a smaller capacity, but its price is relatively lower and it is suitable for small-scale production. Vertical roller mill has a larger capacity, but the operating cost is higher, which is mainly due to the loss of wear parts. In terms of the power consumption, Raymond mill consumes less energy, while vertical roller mill consumes more energy due to the need for drying the raw materials.
In conclusion, Raymond mill and vertical roller mill have their own advantages and disadvantages. They have different working principles and performances in operation. The choice of grinding equipment should be based on the specific needs of customers, and comprehensively consider factors such as production capacity, output size, energy consumption, and investment cost.
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