What are the advantages of vertical roller mill processing materials?
What are the advantages of vertical roller mill processing materials?
The vertical roller mill is an ideal large-scale grinding equipment. It adopts the novel roller grinding principle and scientific structural design, and draws a number of pre-grinding technology essences. Compared with traditional roller mills, fine crushers, roller presses, and various types of impact crushers, it has significant advantages, realizing the high efficiency, energy saving and environmental protection of pre-powder technology, widely used in cement, electric power, metallurgy. , chemical, non-metallic minerals and other industries. It integrates crushing, drying, grinding and grading and conveying. It has high production efficiency and can grind the bulk, granular and powder raw materials into the required powdery materials. The vertical roller mill has the following six outstanding technical advantages when processing materials.
1. Production investment costs are greatly reduced
The vertical roller mill system has a simple process, compact layout, small building area, and covers an area of about 70% of the ball mill system. The building space is about 60% of the ball mill system and can be arranged in the open air, which directly reduces the investment cost of the enterprise. 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, and the energy consumption is low. The power consumption of the grinding system is 20%~30% lower than that of the ball mill, and the power saving effect is more obvious with the increase of raw material moisture. 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, so the noise is small, 20~25dB lower than the ball mill. In addition, the vertical roller mill adopts a fully enclosed system, the system works under negative pressure, no dust, and the environment is clean.
3. Strong material drying ability
The vertical roller mill uses hot air to transport materials, which can control the inlet air temperature when grinding materials with large moisture content, 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. Easy to operate, easy to maintain
The vertical roller mill is equipped with an 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 liner can be replaced quickly and easily, reducing the downtime of the enterprise.
5. Product quality is stable and easy to detect
The chemical composition of the product is stable and the particle size is uniform, which is beneficial to calcination. The material stays in the vertical roller mill for only 2-3 minutes, while in the ball mill it takes 15-20 minutes. Therefore, the chemical composition and fineness of the vertical roller mill product can be quickly determined and corrected.
6. Small wear and high utilization rate
Since the grinding roller and the grinding disc have no direct contact between metals in the vertical roller mill operation, the wear is small, and the metal consumption per unit product is generally 5-10 g/t.