Main advantage

20-50% more energy-efficient than ball milling
For Portland cement, slag, and blended cement
Stable and reliable operation, high production efficiency
Easy to maintain, low maintenance cost
Drying operations can be effectively carried out when grinding blast furnace slag or mixed cement with high moisture content
Ensure stable cement quality and easy adjustment of quality parameters
Long service life
The grinder design is simple and compact
Mature and reliable technology

Product advantages

1. The grinding efficiency is high, and the vertical mill uses grinding rollers and a material bed to crush and grind materials, with low energy consumption. The power consumption of the grinding system is reduced by 20-30% compared to the ball milling system, and the energy-saving effect is more significant as the humidity of the raw materials increases
2. Strong drying ability, the vertical mill adopts gas conveying material. When grinding materials with high moisture content, the inlet air temperature can be controlled to achieve the final moisture content of the product. Materials with moisture content up to 12-15% can be dried in the vertical mill. Even for drying ball milling, only materials with moisture content of 3-4% can be dried
3. The particle size of the material to be ground is large, reaching about 5% of the diameter of the grinding roller, usually 40-100 millimeters. Therefore, large and medium-sized vertical mills can avoid secondary crushing
4. The product has stable chemical composition and uniform particle size distribution. Due to the fact that the material only stays in the vertical mill for 2-3 minutes, while ball milling takes 15-20 minutes, when using vertical grinding powder, the chemical composition of the product can be quickly determined and corrected, with minimal fluctuations in the product's chemical composition, which is beneficial for homogenization. In addition, qualified products in the vertical mill can be separated in a timely manner, avoiding repeated grinding. The particle size of the products is uniform and consistent, which is conducive to calcination
5. The process flow is simple, the building area is small, and the space occupation is small. There is a separator inside the vertical mill, and there is no need to equip it with a powder selection machine and a lifting machine. The dust containing gas from the mill can be directly collected into the dust collector as a product. Therefore, the process is simple, the layout is compact, and the building area is only 70% of the ball milling system, with a building space of about 50-60% of the ball milling system
6. Low noise, minimal dust, clean operating environment. The vertical mill operates without direct contact between the grinding roller and the grinding disc, and there is no sound of steel balls colliding with each other or hitting the lining plate during ball milling. Therefore, the noise is low, about 20-25 decibels lower than ball milling. In addition, the vertical mill is sealed as a whole, and the system works under negative pressure, so there is less dust. Clean environment and meet environmental requirements
7. The metal loss is small, the lining plate and grinding roller have a long service life, and the utilization rate is high. Due to the lack of direct contact and collision between metals in the operation of the vertical mill, the wear of accessories is low and the service life is long. The metal loss per unit product is generally 5-10 grams/ton. For medium hardness cement materials, the service life of the grinding roller and lining plate can reach about 8000 hours.

Technical Parameter