Raymond vertical mill roller wear coal grinding

The extremely versatile design of the Raymond vertical mill allows it to handle virtually any type of material, including clay, kaolin, bentonite, talc, barite, petroleum coke, anthracite coal and lignite. The high specific gravity materials such as barite and established relationships with minerals producers worldwide enable us to offer mills designed specifically for their applications.

The working principle of the Raymond vertical mill

The working principle of the Raymond vertical mill is similar to that of the ball mill, but the Raymond vertical mill has a higher efficiency and a lower power consumption. The working principle of the Raymond vertical mill is as follows:

When the material to be ground is fed into the grinding chamber of the mainframe, it is scooped up by the shovel blade and sent to between the grinding roll and the grinding ring for grinding. After being ground by the roller, it falls down to the bottom of the ring due to its own gravity and centrifugal force. Under this condition, it will be ground again. The qualified powder after being separated from air flow by classifier wheel goes through pipes into cyclone collector where it is discharged then through discharge valve as final products.

The maintenance and repair of the Raymond vertical mill

The Raymond vertical mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range.

As a result, a large number of products can be reduced to the desired fineness with a minimum of oversize material. This high-efficiency mill produces sub-micron size particles, yet has the flexibility required to handle typical secondary grinding duties such as sulfur removal and limestone beneficiation.

While the majority of coal raymond vertical mills are repaired on an as-needed basis, there are some maintenance and repair tasks that should be performed on a regular basis. These tasks include:

Inspecting the wear on the rollers and replace them if necessary

Lubricating the bearings and other moving parts

Checking the tightness of all bolts and screws

Replacing any wearing or damaged parts

What is the Raymond Vertical Mill?

The Raymond Vertical Mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range.

As a result, a large number of products can be reduced to the extreme fineness required for successful application in such fields as plastics, paints and similar industries where finely ground pigment particles are incorporated in the product.

In addition to free moisture content of the material being ground, the degree of fineness required and other conditions prevailing at the mill site must be considered when selecting grinding equipment. For example, when pulverizing coal for combustion in furnaces it is necessary to account for variables such as:

* Moisture content

* Fineness desired

* Output capacity required

* Air temperature and humidity conditions

* Coal grindability

What are the benefits of the Raymond Vertical Mill?

The Raymond vertical mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range.

As a result, a large number of products can be reduced to the extreme fineness required for combustion in little more than one hour. The extremely efficient grinding action results in low power consumption and maintenance requirements. Additionally, the absence of moving parts in contact with the product being ground makes the Raymond vertical mill ideally suited for situations where potentially explosive materials are processed within the plant.

What are the drawbacks of the Raymond Vertical Mill?

The Raymond Vertical Mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range. The principle of integral air classification, originally developed by Raymond®, has been applied with great success to this mill.

However, there are some drawbacks associated with this type of mill. First, the wear on the rollers and grinding table is relatively high. Second, because of the high speed at which the mill operates, it can create a lot of noise.

How does the Raymond Vertical Mill work?

The Raymond Vertical Mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range.

As a result, a large number of products can be reduced to the extreme fineness required for effective combustion in furnaces and chemical processes. For example, flash drying of coal or limestone requires milling to particle sizes below 100 microns and calcining at temperature up to 1650°F. It is suitable for grinding a wide variety of non-abrasive materials including some very hard materials such as bituminous coal and anthracite coal.

How to operate the Raymond Vertical Mill?

The Raymond Vertical Mill is a high-speed air swept swing hammer mill used to pulverize materials in the extreme fineness range. As a result, a large number of products can be reduced to 95% to 99% passing 15 to 20 microns while others with smaller crystalline structure and greater hardness require 90% to 95% passing 200 mesh.

Wear on the grinding elements has very little effect on capacity or fineness as long as replacement parts are available when needed. Some products, however, such as coal and pigments, are not ground well in ball mills but work quite well in a Raymond Roller Mill. With proper operation and maintenance, the Raymond Vertical Mill can produce materials with consistent particle size and shape for many years.

Conclusion

Raymond vertical mill roller wear coal grinding is a very common and important problem in the operation of Raymond vertical mills. The wear of rollers affects not only the output and efficiency of the mill, but also the life of rollers and other wearing parts. Therefore, it is necessary to regularly check and replace worn parts. In addition, regular maintenance can also extend the service life of the mill and improve its performance.