VRM Cement Mill
vertical roller mill in cement plant
Production Capacity: 50-250t/h
Feeding Size: ≤1100mm
Application: cement, power, chemical engineering, and non-metallic minerals, etc.
VRM cement mill, or vertical roller mill, as an efficient cement plant equipment, has been widely applied in various stages of cement production, including raw material preparation, coal powder preparation, and cement grinding plant.
Our VRM cement mill adopts the latest cement grinding technology, integrating grinding, drying, powder selection, transportation and collection functions. Compared with traditional ball mills, it can save 30% electricity per ton. The floor area is reduced by 50% to 70%, with superior environmental performance, low noise by 20-25 dB, strong adaptability, capable of processing high moisture materials, and is an ideal choice for the cement industry.
VRM Cement mill parts
The main structure of the VRM cement mill consists of a separator, a grinding roller, a grinding table, a pressurization device, a reducer, an electric motor, and a casing, etc.
highlights of VRM Cement mill
Energy saving
The VRM cement mill uses the grinding rollers to crush the materials by pressing them against the material bed. It has low energy consumption, with a total energy consumption of 25 kWh per ton. Compared to the traditional ball mill grinding system, it saves over 30% of energy.
excellent product
Their particle shape is comparable to that of ball-milled products. The strength of the cement (3-day, 7-day, and 28-day strength) is comparable to or even slightly higher than that of ball-milled products. and the particle matching of the cement is convenient for adjustment.
minimal wear
With a metal consumption of 4-5 grams per ton; the wear plates and grinding rollers have a long service life and high utilization rate. For medium-hard cement materials, the service life of the grinding rollers and wear plates can reach approximately 8,000 hours.
Strong drying capacity
The vertical mill uses gas to convey materials. When grinding materials with high moisture content, it can control the inlet air temperature to ensure that the products reach the final moisture content.
Simple process flow
with a small floor area. The building area is only 70% of that of the ball mill system, and the building space is approximately 50-60% of that of the ball mill. There are fewer mechanical and electrical equipment, making operation and maintenance convenient.
Low noise, minimal dust
During the operation of the vertical mill, the grinding rollers and the grinding discs do not come into direct contact. Additionally, the vertical mill is fully sealed, and the system operates under negative pressure, resulting in less dust.
The technical principle of VRM cement mill
The vertical roller cement mill achieves cement grinding through the following steps:
- Material transportation and crushing: The motor drives the reducer to rotate the grinding disc. The cement raw materials fall from the discharge port into the center of the grinding disc. Under the action of centrifugal force, they move towards the edge and are crushed and ground by the grinding rollers.
- Hot air drying and classification: The ground materials are lifted by the high-speed hot air flow from the nozzle ring, forming a suspension layer. The large particles fall back onto the grinding disc due to centrifugal force and are re-ground, while the fine powder is carried by the air flow into the classifier.
- Powder selection and product collection: The powder separator rotates the rotor to separate the coarse powder and return it to the grinding disc. The fine powder is carried by the airflow and enters the dust collection device (such as a bag-type dust collector or electrostatic dust collector) for collection, which is the finished cement product.
Technical parameters for grinding various types of cement
| Cement type | Output,t/h | Specific surface area,m²/kg | Power consumption,kWh/t | |||
|---|---|---|---|---|---|---|
| Main motor | Fan | Separator | System | |||
| OPC | 150 | 330 | 21.7 | 9.3 | 0.3 | 31.3 |
| PCB50 | 155 | 340 | 21.0 | 9.0 | 0.3 | 30.3 |
| PCB40 | 164 | 334 | 18.4 | 9.8 | 0.3 | 27.5 |
VRM CEMENT MILL WITH FACTORY PRICE!
Investment returns of VRM cement mill
AGICO CEMENT can offer a variety of solutions for your cement grinding production line, and the specific choice will be made based on the actual situation and requirements of the customer.
| Comparison Items | Option 1: Closed-Circuit Ball Mill System | Option 2: Combined Grinding System | Option 3: Vertical Roller Mill (VRM) Final Grinding System | |
| Cement Type | P·O42.5 | P·O42.5 | P·O42.5 | |
| Cement Mix Ratio (%) | Clinker | 90 | 90 | 90 |
| Limestone | 5 | 5 | 5 | |
| gypsum | 5 | 5 | 5 | |
| Cement Specific Surface Area (cm²/g) | 3500 | 3500 | 3500 | |
| System Output (t/h) | 170 | 160 | 160 | |
| System Power Consumption (kWh/t) | 41 | 33 | 28 | |
| Annual Electricity Cost Savings (10,000 RMB) | — | 400 | 700 | |
| Metal Wear (g/t) | 50 (steel balls) | 30 (steel balls + roller surface) | 5 (grinding roller + grinding table) | |
| Drying Capacity | Weak | Medium | Strong | |
From the data in the table, it can be seen that the vertical grinding system is more energy-efficient than the ball mill and roller press systems. In terms of energy saving, here is a calculation for you as shown in the following table:
| The economic benefits are analyzed based on the high operation rate, energy savings, and reduced operation & maintenance costs of the vertical roller mill system. | |
| Items | Amount (RMB) |
| Annual electricity savings | The electricity saved per ton of cement is calculated at 4.5 kWh/t. For 5,000 tons of cement per day, and considering 300 days in a year, with each kilowatt-hour costing 0.7 yuan, the annual electricity savings amount to: ¥4,725,000 |
| Annual maintenance and repair cost savings | ¥3,660,000 |
| Maintenance cost savings per ton of cement | ¥45,000 |
| Total annual economic benefit | ¥8,430,000 |
why choose AGICO CEMENT?
- Rich manufacturing experience: With over 20 years of experience in the research and manufacturing of cement plant equipment, proficient in the design and optimization of various types of vertical mills, ball mills, and grinding systems.
- Strong R&D capabilities: A professional R&D center has been established, equipped with advanced material testing, power simulation and automation control laboratories.
- Core components supply: The main reducer, grinding rolls, grinding discs, hydraulic system, and classifier, among other key components, are all produced within the factory, enabling full-process quality control.
- Full production and testing system: We have multiple vertical mill production lines and modern processing equipment, along with CNC, laser detection, dynamic balance detection and other means, ensuring that the products leaving the factory are of high precision and stable performance.
- EPC integrated turnkey service: This service offers a one-stop solution covering equipment selection, process design, production manufacturing, installation and commissioning, as well as operation guidance.
- Comprehensive after-sales service: Provide remote monitoring and fault diagnosis, and respond to customer needs 24 hours a day. Regular on-site inspections and equipment maintenance guidance
