Vertical Grinding Equipment Dolomite Vertical Mill Large Single Machine Production Capacity

Vertical Grinding Equipment | Dolomite Vertical Mill | Large Single Machine Production Capacity Low Operating Costs

1, Introduction to Vertical Dolomite Mill

Vertical mills, as large-scale grinding equipment, are widely used in industries such as building materials, power, metallurgy, chemical engineering, and non-metallic minerals.
Hefei Hengcheng HVM vertical mill adopts international vertical mill technology, integrating crushing, drying, grinding, powder selection, and transportation, ensuring the continuity and stability of production and improving grinding efficiency.
Hefei Hengcheng can customize according to the material characteristics of customers, with flexible configurations to meet their personalized grinding needs.
Capacity: 1-50 t/h
[Finished product fineness] adjustable from 200 to 1250 mesh
[Mineral processing field] Limestone, dolomite, calcite and other non-metallic minerals
[Building materials field ] Various cementitious materials such as raw materials and clinker
[Metallurgical field] metallurgical slag such as blast furnace slag, steel slag, furnace slag, manganese slag, nickel slag, etc

2, Process Introduction
The material discharge pipe falls into the center of the grinding plate, and the constant speed rotating grinding plate uses centrifugal force to evenly disperse and flatten the raw materials outward, forming a certain thickness of material bed. The material is simultaneously crushed by multiple grinding rollers on the grinding plate. Under the continuous drive of centrifugal force, the material continuously moves towards the outer edge of the grinding disc. The material leaving the grinding disc encounters hot gas entering the mill through the wind ring and rises accordingly. It enters the separator through the middle shell of the mill, and during this process, the material undergoes sufficient heat exchange with the hot gas, and the water is quickly evaporated. The powder concentrator controls the fineness of the finished product at the outlet of the roller mill. Particles larger than the specified size are separated and fall back to the grinding disc. Materials that meet the fineness requirements are fed into the finished product warehouse through the powder concentrator.

3, Working principle of vertical mill
The main motor drives the grinding plate to rotate through a reducer, and the material enters the vertical mill main machine through a screw conveyor. Under the action of gravity, it falls to the center of the grinding plate, while the airflow generated by the fan enters the main machine through the air inlet. Under the action of centrifugal force, the material moves evenly from the center to the edge of the grinding plate. When passing through the roller track area on the grinding plate, it is crushed by the grinding roller, and large pieces of material are directly crushed. Fine particles of material are crushed to form a material layer and undergo inter particle crushing. The crushed material continues to move towards the edge of the grinding plate until it is carried away by the strong airflow of the annular guide groove around the grinding plate. Coarse materials fall back into the grinding plate due to their high gravity and are ground again; Finer materials enter the powder selection system above the main machine for classification as the airflow rises. Under the action of the rotor blades of the classifier, coarser particles are knocked off by the blades and returned to the grinding disc for grinding. Qualified fine powder will be carried out of the powder selection system with negative pressure air flow, enter the dust removal equipment, and then collected by the powder collector to form the finished product. In addition, other large particle materials and debris will fall into the lower chamber of the mill during grinding and be scraped into the slag discharge port by the scraper, effectively ensuring the quality of the finished product.
By adjusting the pressure of the hydraulic system, the grinding roller pressure can be adjusted to adapt to different hardness raw materials within a certain range. The rotor speed of the grading system with multiple grading wheels can be adjusted and controlled, and various qualified finished products with different specifications can be obtained.

Main features of the product
1. Efficient and energy-saving:
(1) High grinding efficiency and low energy consumption, compared to ball mills, the energy consumption is 40% -50% lower;
(2) Large single machine production capacity, capable of utilizing low valley electricity;
(3) Vertical grinding technology and equipment are vigorously advocated new technologies for energy conservation and consumption reduction, which are conducive to enhancing the competitive strength of enterprises in the powder industry in this region and even across the country;
2. Easy maintenance and low operating costs:
(1) The grinding roller can be turned out of the machine using a hydraulic device, and the replacement of the roller sleeve lining plate and the maintenance space of the mill are large, making the maintenance operation very convenient;
(2) The grinding roller sleeve can be used upside down, extending the service life of wear-resistant materials;
(3) Before starting the machine, there is no need to apply fabric to the grinding disc, and the mill can be started without load, eliminating the difficulty of starting the machine;
(4) Low wear, special materials are used for the grinding roller and disc lining plate, resulting in a long service life;
(5) High degree of automation: The automatic control technology adopts the Siemens series PLC from Germany, equipped with an automatic control system, which can achieve remote control and easy operation. The workshop can basically achieve unmanned operation, saving operating costs;
3. Low comprehensive investment cost:
Integrating crushing, drying, grinding, and conveying, the process flow is simple, the system equipment is few, the structural layout is compact, and the floor area is only 50% of that of the ball mill. It can be arranged outdoors, with low construction costs, directly reducing the investment cost of the enterprise.
4. Stable product quality:
(1) The material stays in the grinder for a short time, making it easy to detect the particle size distribution and composition of the product, and ensuring stable product quality;
(2) The product has uniform particle morphology, narrow particle size distribution, good flowability, and strong product adaptability.
5. High reliability
(1) Adopting a grinding roller limit device to avoid severe vibration caused by material breakage during the working time of the mill;
(2) Adopting a new type of roller sealing device, the sealing is more reliable, and there is no need for a sealing fan, further reducing the oxygen content in the mill and achieving better explosion suppression performance.
6. Environmental protection:
(1) The entire system of HVM vertical grinding machine has low vibration and low noise;
(2) The system is sealed as a whole, operates under full negative pressure, and there is no dust leakage, basically achieving a dust-free workshop.

Product advantages
1. High degree of automation, simple operation, and labor saving.
2. The equipment operates stably, efficiently and environmentally friendly.
3. The supply chain is complete and the delivery cycle is short.
We have a large casting base that can ensure the supply of complete equipment and spare parts support.

Technical Parameters Table

Re:The data based on Mohs'hardness 3-4 material
The product fineness can reach 10 um(1250 meshes)