Cement clinker is more difficult to grind than raw meal, requiring higher quality materials for the grinding discs and rollers, and increasing energy consumption by 10-15% per ton. However, its energy-saving advantage over ball mills remains significant.
Using a vertical roller mill for cement mixture grinding saves 15-20% on power consumption per ton compared to traditional tube mills, resulting in a significant long-term cost advantage.
During operation, the grinding rollers and liners in a vertical mill do not directly contact each other, eliminating the metallic impact noise from steel balls colliding with the liner, resulting in 15-20 dB lower noise than ball mills.
The separator uses a DC motor drive; changing the speed allows for adjustments to meet different product fineness requirements. The specific surface area of the cement clinker mixture reaches ~350 m³/kg, and it enters the classifier for grading with the airflow. The fineness of the classification is adjustable according to the type of cement and specific requirements.
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.
Material falls into the center of the grinding disc through the feed pipe. The constantly rotating disc, aided by centrifugal force, evenly disperses and flattens the raw material, forming a material bed of a certain thickness. Simultaneously, the material is crushed by multiple grinding rollers on the disc. Driven continuously by centrifugal force, the material moves towards the outer edge of the grinding disc. When the material leaving the disc encounters air entering the mill through the air ring, it rises and enters the separator through the central shell of the mill. The classifier controls the finished particle size at the roller mill outlet. Particles larger than the specified size are separated and fall back to the grinding disc, while material meeting the fineness requirements enters the cement finished product silo through the classifier.
Automatic roller lifting and lowering functions, enabling no-load start-up.
Welded arc-shaped plate seal, simple and reliable structure, good sealing effect.
With the help of the roller flipping device, the grinding rollers can be easily flipped out of the mill for maintenance.
Mechanical limit mechanisms prevent direct metal-to-metal friction and collision between the grinding rollers and the grinding disc, enhancing operational safety.
The low operating pressure of the hydraulic system reduces oil leakage and mill vibration, facilitating operation and management.
The grinding roller bearings utilize centralized circulating lubrication with thin oil, operating at low temperatures and with pure grease, effectively extending bearing life.
As a provider of overall solutions for grinding equipment, Liming Heavy Industry insists on providing customers with efficient, energy-saving and environmentally friendly grinding equipment and services.
With nearly 40 years of experience in mill manufacturing, Liming Heavy Industry has launched Raw Material Vertical Mill, which can meet the fineness requirements of users for processing different materials. The products are stable in operation, economical in investment, and green and environmentally friendly!
Liming Heavy Industry is a pioneer in the global powder new materials mineral grinding and resource recycling industries in grinding equipment technology system solutions and services. The company covers a total area of more than 1,600 acres and has served more than 30,000 customers in more than 180 countries and regions. It has obtained more than 280 patents and was the first in the industry to pass ISO9001 international quality system certification, EU CE certification, and Customs Union CU-TR certification.
Focusing on customer needs in different fields, the product processing range covers 1-3mm coarse powder, 20-400 mesh fine powder, 400-1250 mesh ultrafine powder and 1250-3250 mesh micro powder, covering the entire process chain of new material mineral grinding.
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