raw material vertical roller mill with drying function

Raw Material Vertical Roller Mill Overview

Raw material vertical roller mill has more energy saving, environmental protection and high efficiency compared with traditional ball mill, which is an important part of raw material grinding system in modern industry.

Working Principle of Raw Material Vertical Roller Mill

1. Material Feeding and Distribution: The material enters the mill through the lower chute and is evenly distributed on the grinding disk. The material flows with the rotation of the grinding disk and enters into the grinding track.
2. Material Crushing and Grading: The material is pressed and ground by the grinding rollers on the grinding disk, and under the action of centrifugal force, the fine powder moves to the outer edge of the grinding disk. By spraying hot air, the coarse particles will be brought back to the grinding track for regrinding, while the fine particles will enter the separator.
3. Material Sorting and Regrinding: Fine particles enter the rotor through the static blades of the separator, while coarse particles are thrown back to the mill for regrinding by the rotor, which ensures the uniform fineness of the material.
4. Fineness Adjustment: The fineness of the products of raw material vertical roller mill can be accurately controlled by adjusting the rotor speed, adjusting the position of the static blades and so on, to meet the needs of different product fineness.

Through the relative movement of the grinding roller and the grinding disk, efficient grinding is realized in a short time. The grinding rolls are connected to an electric motor through a speed reducer, which drives them to rotate and exert pressure. After the materials are subjected to the pressure of the grinding rollers on the grinding disk, they are pushed by centrifugal force and driven by the hot air flow to complete the crushing and sorting. The optimized separator design effectively separates fine and coarse particles for further processing. The reasonable layout of grinding rolls and discs, high-quality lining materials, and advanced classifying devices work together to enable the mill to operate efficiently under different production conditions, ensuring the fineness and uniformity of the product.

Advantages of Raw Material Vertical Roller Mill

1. Process Advantages: Adopts German Loesche vertical mill technology, optimizing the working mechanism of grinding rollers and grinding discs, making the shape of the ground material particles more uniform and detailed. The unique structural design can effectively avoid excessive grinding of materials and maintain better particle gradation.
2. Stable Quality: The equipment can produce PC42.5 cement with a specific surface area as high as 3900cm²/g, ensuring stable and reliable quality. Its grinding capacity and performance have been recognized by many customers as the equipment for cement grinding system.
3. Energy Saving Advantage: Compared with the traditional ball mill, the raw material vertical roller mill’s single system power consumption is as low as 25kWh/t, whereas the ball mill’s power consumption is usually 40kWh/t. This reduces energy consumption by about 15kWh/t, greatly improving production efficiency and reducing operation cost.
4. Strong Wear Resistance: Since there is no direct contact between the grinding rolls and the grinding disk, and the rolls and liners are made of high-strength wear-resistant materials, wear is minimized, the service life is greatly extended, and maintenance and part replacement frequency is reduced.

Application Areas of Raw Material Vertical Roller Mill

• Cement Industry: Used for grinding raw materials in cement production, including limestone, clay, slag, etc. Its high efficiency and energy saving make it the mainstream equipment in modern cement production.
• Power Industry: Widely used in coal-fired power plants for coal powder preparation. Vertical mills can grind coal into fine powder to facilitate combustion, improve efficiency, and reduce energy consumption.
• Metallurgical Industry: Used in the grinding treatment of iron ore, coal, coke, and other raw materials to improve smelting efficiency.
• Chemical Industry: Applied to petrochemical, fertilizer, paint, and other chemical products raw materials grinding, ensuring product fineness and quality.
• Non-metallic Minerals: Suitable for grinding quartz, silicate, bentonite, talcum powder, and other non-metallic minerals to meet different fineness requirements.
• Environmental Protection Industry: Used in environmental projects for dealing with waste residue, industrial waste, etc., to achieve resource reuse and pollution control.