Raw Material Vertical Mill （vertical mill for raw materials）is an energy-saving grinding equipment that integrates drying, grinding, grading, and conveying. It has the characteristics of high grinding efficiency, low power consumption, large feed particle size, low noise, small dust, easy use and maintenance, and low consumption of wear-resistant materials. The comprehensive performance of the product has reached the international advanced level and is mainly used in large-scale raw material processing in industries such as cement, electricity, and metallurgy.
1.High grinding efficiency:
By adopting advanced material layer grinding principles, the system's power consumption can be reduced by 20-30% compared to ball mills. As the moisture content of the raw materials increases, the energy-saving effect becomes more significant.
2.High drying capacity:
Materials can be dried using kiln hot air waste gases, and raw materials with a moisture content of up to 15% can be simultaneously dried and ground.
3.Small in size, and simple process flow:
It integrates crushing, drying, grinding, powder classifying and conveying，without the need for additional equipment such as drying, powder selection, and lifting. The workshop area only accounts for 70% of the ball mill system, and the space only occupies 50-60% of it.
4.Low noise, minimal dust, and clean operating environment:
The grinding roller and grinding disc do not contact directly during operation, there is no metal impact, and the noise is 20-25 decibels lower than that of the ball mill. The system adopts fully sealed negative pressure operation, with no dust and a clean production environment.
5.Low wear consumption:
Low wear consumption for the mill and low metal pollution for powder, generally metal wear consumption only 5-10g/t. the grinding roller sleeve can be flipped over for use, which is beneficial for extending its service life and reducing production costs. Easy to operate and maintain.
6.Particle size distribution balance
Grinding products have stable chemical composition, particle size distribution balance, which is beneficial to calcine.
Working Principle
The material falls into the center of the grinding disc through the feeding device. The grinding disc, which rotates at a constant speed, under the centrifugal force to evenly disperse and flatten the raw material, forming a certain thickness of material layer. The material is simultaneously crushed by multiple grinding rollers on the grinding disc. Under the continuous drive of centrifugal force, the material continuously moves towards the outer edge of the grinding disc. When the material leaving the grinding disc encounters hot air entering the mill through the air ring and rises accordingly, it enters the classifier through the middle body of the mill. During this process, the material undergoes sufficient heat exchange with the hot air, and the moisture is quickly evaporated. The powder classifier controls the particle size of the finished product. Particles larger than the specified size are separated and fall back to the grinding disc. Materials that meet the fineness requirements enter the finished product silo through the powder classifier.
Vibration or noise often comes from poor roller-bearing lubrication, tramp metal, unstable bed or abnormal hydraulic pressure. Check vibration and temperature trends, stop to inspect de-ironing and chamber for foreign objects, correct bed thickness and p
Yes. The LM Vertical Roller Mill is a mature choice for cement raw meal, grinding and drying limestone, clay and iron powder to meal fineness with classification and homogenization. Its low energy and stable quality fit new dry-process cement, the mainst
Metallic iron accelerates roller wear and can damage the mill, so the LM Vertical Roller Mill requires suspended separators and metal detectors upstream with periodic cleaning. Abnormal vibration and current monitoring can also detect tramp metal to prot
The LM Vertical Roller Mill hydraulic system applies and stabilizes roller pressure and lifts or drops rollers. Lifting eases maintenance access; in operation pressure is fine-tuned by bed thickness to optimize efficiency. The unit has accumulators to cu
The LM Vertical Roller Mill suits dry grinding of non-minerals and cement raw meal; product fineness is usually 80–325 mesh, with some configs reaching 400 mesh (about 0.038 mm). Coordinated dynamic-analyzer speed and airflow stably yield uniform powde
Qualified powder is captured by the bag collector and sent via rotary valve and air slide or pneumatic pump to the product silo. Negative-pressure operation ensures high recovery with no dust, and can link with homogenizing and bulk-loading for storage a
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