The vertical roller mill (vertical mill for short) in the coal crusher is an efficient and multi-functional equipment specially used for the crushing and processing of coal and other materials. The following is a detailed introduction to the vertical roller mill:
1. Structural composition
Vertical roller mill mainly consists of the following parts:
• Machine body: As the supporting structure of the entire equipment, there is a certain rotation center centering structure between the grinding plate device and the machine body.
• Grinding disc device: It includes core components such as the grinding disc and grinding roller, which can be rotatably supported on the machine body through the rotating guide rail at the bottom.
• Transmission device: used to drive the grinding plate to rotate, usually using a universal reducer to ensure compact structure and reliable operation.
• Feed port: Located at the top of the equipment, it is used to feed the coal to be crushed into the interior of the machine.
• Discharge port: Located at the bottom of the equipment, it is used to discharge the crushed coal particles from the inside of the machine.
2. Working principle
The working principle of the vertical roller mill is: that the motor drives the grinding plate to rotate through the reducer, and the material (coal) enters the center of the grinding plate from the feed port. As the grinding disc rotates, the material moves toward the edge of the grinding disc under the action of centrifugal force and is crushed by the grinding roller. The crushed materials are brought up by the high-speed airflow of the air ring and separated into coarse and fine particles through the separator. The qualified fine powder comes out of the grinding mill along with the airflow and is collected by the dust collection device.
3. Technical characteristics
• Simple and compact structure: The vertical roller mill adopts a compact design, which makes the equipment occupy a small area and is easy to install and lay out.
• High efficiency and energy saving: The vertical mill uses a large roller system to grind materials in large quantities, with high efficiency and low energy consumption.
• Strong drying capacity: The equipment operates under negative pressure, has less dust, and has a strong drying capacity, which can meet the requirements of materials with different humidity.
• Easy maintenance: the normal service life of the grinding parts is long, and the grinding roller can be lifted and lowered by itself to realize no-load start; at the same time, the grinding roller can be automatically turned out of the casing by the action of the oil cylinder, which is convenient for maintenance and replacement.
4. Technical parameters
• Equipment model: Choose different models of vertical roller mills according to actual production needs.
• Capacity: Depending on the equipment model and configuration, vertical roller mills have different processing capacities, ranging from a few tons to hundreds of tons.
• Energy consumption: Vertical roller mills have lower energy consumption, the specific value depends on factors such as equipment model, workload, and coal properties.
• Crushing particle size: The separator can be adjusted as needed to achieve the required thickness for different products.
5. Application areas
Vertical roller mill is widely used in coal processing, electric power, metallurgy, chemical industry, and other industries, and is one of the important grinding equipment in these industries. In the coal processing industry, vertical roller mills are mainly used to crush coal to the required particle size to meet the needs of subsequent processes such as mixing, screening, or direct combustion.
In short, as an efficient and energy-saving coal crushing equipment, vertical roller mill plays an important role in coal processing and other industries. Its unique working principle and structural characteristics make the equipment have the advantages of high efficiency, low energy consumption, low noise, and easy maintenance.
