Vertical roller mill

Vertical roller mill

Product Introduction

Structural composition:

• Grinding disc:

A horizontally placed circular component made of wear-resistant material. The material is ground on the grinding disc, which is driven to rotate by a motor through a reducer.

• Grinding roller:

Multiple cylindrical components pressed on the grinding disc by hydraulic or mechanical devices. The grinding roller rolls as the grinding disc rotates to grind the material.

• Powder selector:

Located at the top of the vertical mill, it is used to separate fine powder and coarse powder from the ground material. The fine powder is collected as the finished product, and the coarse powder is returned to the grinding disc for re-grinding.

• Transmission device:

Including motor, reducer, coupling, etc., to provide power for the grinding disc and powder selector.

• Hydraulic system:

used to control the pressure of the grinding roller to ensure the grinding effect of the grinding roller on the material.

• Shell:

The outer shell of the vertical mill, which plays a role in supporting and protecting the internal components. The shell is equipped with a feed port, a discharge port, an inspection door, etc.

• Hot air system:

Hot air is introduced into the vertical mill to dry and transport materials. The hot air system includes a hot air furnace, a fan, a pipeline, etc.

• Working principle:

The material enters the vertical mill from the feed port and falls in the center of the grinding disc. The grinding disc rotates under the drive of the motor, driving the material to move to the edge of the grinding disc. At the same time, the grinding roller is pressed on the grinding disc under the action of the hydraulic system to grind the material. The ground material is brought into the powder selector by hot air, and the fine powder is selected as the finished product, and the coarse powder is returned to the grinding disc for re-grinding. The hot air in the vertical mill not only plays the role of drying the material, but also plays the role of conveying the material.

Advantages and characteristics

High efficiency and energy saving:

• High grinding efficiency:

The vertical mill adopts the principle of layer crushing. The material is squeezed, sheared and ground between the grinding disc and the grinding roller, and at the same time, it is affected by centrifugal force, so that the material forms a stable material layer on the grinding disc. This layer crushing method makes the material grinding efficiency high and can reach the required fineness in a shorter time.

• Significant energy saving effect:

Compared with traditional ball mills, vertical mills have low energy consumption. This is because the grinding roller of the vertical mill acts directly on the grinding disc, reducing the energy transmission loss. At the same time, the use of hot air system allows the material to be dried during the grinding process, reducing the moisture content of the material, improving the grinding efficiency, and further reducing energy consumption.

• High degree of automation:

Vertical mills are usually equipped with advanced automatic control systems, which can realize remote monitoring and operation of the equipment. The automatic control system can automatically adjust the operating parameters of the equipment, such as roller pressure, hot air temperature, powder selector speed, etc., according to the nature of the material and production requirements, to ensure the stable operation of the equipment and high efficiency and energy saving.

Small footprint:

• Compact structure:

The vertical mill has a compact structure and a small footprint. Compared with the traditional ball mill, the vertical mill is higher, but the floor space is only about 50% of the ball mill. This gives the vertical mill a great advantage in the case of limited space.

• Easy installation:

The installation of the vertical mill is relatively simple, and does not require a large foundation and complex installation process. The equipment can be assembled in the factory and then transported to the site for installation as a whole, shortening the installation period and reducing the installation cost.

Stable product quality:

• Uniform fineness:

The powder selector equipped with the vertical mill can accurately control the fineness of the product, making the fineness of the product uniform and stable. The powder selector can produce products of different fineness according to different production requirements by adjusting the speed and air volume.

• Stable chemical composition:

During the grinding process of the vertical mill, the material is in direct contact with the hot air, which can take away the moisture and volatile substances in the material, thereby reducing the change in the chemical composition of the material. At the same time, the grinding process of the vertical mill is carried out in a closed system, avoiding the mixing of external impurities and ensuring the stability of the chemical composition of the product.

Good environmental performance:

• Less dust emission:

The entire grinding process of the vertical mill is carried out in a closed system, and the dust generated by the material during the grinding process is brought into the dust collector by the hot air for collection, reducing the emission of dust. At the same time, the powder selector of the vertical mill can also effectively control the emission of dust, making the environmental performance of the equipment good.

• Low noise:

The transmission device of the vertical mill adopts advanced noise reduction technology, which makes the equipment low in noise. At the same time, the vibration generated by the equipment during operation is also small, which further reduces noise pollution.

Wide range of application:

• Strong material adaptability:

The vertical mill can adapt to different types of materials, such as cement, coal, ore, gypsum, etc. Vertical mills can also effectively grind materials with high hardness and high water content.

• Large production capacity:

Vertical mills have large production capacity and can meet the needs of large-scale production. At the same time, the equipment can be adjusted according to production requirements to achieve production of different outputs.