The working principle and advantages of Vertical roller mill

The working principle and advantages of Vertical roller mill

The Vertical roller mill has a wide application range and a large market demand, which is closely related to the performance of the Vertical roller mill itself. The Vertical roller mill has improved the efficiency, output, and finished product size in the production process, optimizing the drawbacks of the pulverizer, greatly increasing the output while saving energy and reducing consumption. Today, the SBM heavy machine is to introduce to you the working principle and main advantages of the Vertical roller mill to help you understand the Vertical roller mill!

1, the working principle of the Vertical roller mill.

Grinding principle of Vertical roller mill: The ground material is sent to the center of the rotating grinding disc by the lock air feeding device. Under the action of centrifugal force, the material moves to the periphery of the grinding disc and enters the grinding roller. It is pulverized by the pressure of the grinding roller. At the same time, the ground material is blown by the high-speed airflow at the air ring to dry the suspended material, and the fine powder is brought into the separator for classification by the hot air. The qualified fine powder is collected by the dust collecting device as a product, which is unqualified. The coarse powder falls to the grinding disc to re-grind, so cycle, complete the whole process of grinding operation, realize the integrated operation of material fine crushing, drying, grinding and powder selection. The Vertical roller mill is mainly composed of a powder sorting machine, a grinding roller device, a grinding disc device, a pressurizing device, a speed reducer, a motor, a casing and the like. The separator is an efficient and energy-saving powder sorting device. The grinding roller is a component used to crush and crush the material. The grinding disc is fixed on the output shaft of the reducer, which is the place where the grinding roller crushes the material. The pressurizing device is a component that provides a grinding pressure to the grinding roller, and supplies sufficient pressure to the grinding roller to pulverize the material.

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2, the advantages of the Vertical roller mill.

  • (1) The production investment cost is greatly reduced: the Vertical roller mill system has simple process, compact layout, small construction area, and the floor space is about 70% of the ball mill system. The construction space is about 60% of the ball mill system and can be arranged in the open air. Reduced corporate investment costs. And the Vertical roller mill itself has a separator, no need to add a separator and lifting equipment. The dust-laden gas can be collected directly from a bag filter or an electric dust collector.
  • (2) High production efficiency, energy saving and environmental protection: the Vertical roller mill uses the principle of material layer grinding to grind the material, the energy consumption is low, the power consumption of the grinding system is 20% to 30% lower than that of the ball mill, and the power saving increases with the increase of raw material moisture. The effect is more obvious. The energy consumption of the Vertical roller mill system is 30% to 40% compared to the ball mill system. Vertical grinding does not have the metal impact of the ball in the ball mill colliding with each other and hitting the liner. Therefore, the noise is small, 20 to 25 dB lower than the ball mill. In addition, the Vertical roller mill uses a fully enclosed system, the system works under negative pressure, no dust, and the environment is clean.
  • (3) Strong drying ability of material: The Vertical roller mill uses hot air to transport materials, and can control the inlet air temperature when grinding materials with large moisture, so that the product can reach the required final moisture. It can be dried in the Vertical roller mill—grinding into the material with the moisture up to 15%-20%.
  • (4) Convenient operation and convenient maintenance: equipped with automatic control system, which can realize remote control and easy operation. By repairing the oil cylinder and turning the rotating arm, the roller sleeve and the lining plate can be easily and quickly replaced, reducing the downtime of the enterprise.
  • (5) The product quality is stable and easy to detect: the chemical composition of the product is stable and the particle gradation is uniform, which is beneficial to calcination. The material stays in the Vertical roller mill for only 2 to 3 minutes, while in the ball mill it takes 15 to 20 minutes. Therefore, the chemical composition and fineness of the Vertical roller mill product can be quickly determined and corrected.
  • (6) Low wear and high utilization rate: Since the grinding roller and the grinding disc have no direct contact between metals in the vertical grinding operation, the wear is small, and the metal consumption per unit product is generally 5-10 g/t.

In summary, the reason why the Vertical roller mill is popular is that it basically meets the needs of customers for grinding equipment. I believe that with the continuous improvement of technology, the performance of the Vertical roller mill will be more perfect, and only in this way can we grasp The market is not eliminated!

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