Limestone Powder Vertical Grinding 30 T/h Powder Equipment 325 Mesh Fine Powder Grinding

Limestone Powder Vertical Grinding 30 t/h Powder Equipment 325 Mesh Fine Powder Grinding

Description

【Introduction to Vertical Grinding Mill】
The HVM vertical grinding machine is an advanced grinding equipment designed and developed through extensive absorption of advanced technologies from various vertical grinding machines at home and abroad, as well as drawing on a large amount of engineering application experience. It is safe, environmentally friendly, energy-saving, and efficient, and integrates drying, grinding, powder selection, and conveying functions. The main performance and economic and technical indicators of the equipment have reached the international advanced level.
【Application field of limestone vertical mill】
Application scope: cement, coal, feldspar, iron ore, graphite, quartz, slag, etc
Materials: cement, electricity, metallurgy, chemical industry, non-metallic minerals, etc.

Vertical Mill Working Principle:

The main motor drives the grinding disc to rotate through a reducer, and the material enters the vertical mill main machine through a screw conveyor. It is then subjected to gravity and falls to the center of the grinding disc. At the same time, the airflow generated by the fan enters the main machine through the air inlet. Under the action of centrifugal force, the material moves uniformly from the center to the edge of the grinding disc. When passing through the roller conveyor area on the grinding disc, it is crushed by the grinding rollers, and large blocks of material are directly crushed. Fine particles of material are compressed to form a material layer for inter particle crushing. The crushed material continues to move towards the edge of the grinding disc until it is carried away by the strong air flow of the annular guide groove on the periphery of the grinding disc. Coarse materials fall back into the grinding disc due to their high gravity and are ground again; Fine 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 products with different specifications can be obtained.

Technical Data

Re:The data based on Mohs'hardness 3-4 material

      Limestone Bond Index≤13kwh/t

【Main features of the vertical grinding mill】
1. Efficient and energy-saving:
(1) High grinding efficiency, low energy consumption, compared to ball mills, energy consumption is 40% -50% lower;
(2) Single machine production capacity is large, and low valley electricity can be utilized;
(3) Vertical grinding technology and equipment are vigorously advocated as new energy-saving and consumption reducing technologies, which are conducive to enhancing the competitive strength of enterprises in the powder industry in this region and even nationwide;
2. Easy maintenance and low operating costs:
(1) The grinding roller can be flipped out of the machine using a hydraulic device, and the replacement of the roller sleeve liner and the maintenance space of the mill are large, making the maintenance operation very convenient;
(2) The grinding roller sleeve can be flipped over for use, extending the service life of wear-resistant materials;
(3) Before starting up, there is no need to place fabric on the grinding disc, and the mill can be started without load, eliminating the difficulty of starting up;
(4) Low wear, special materials are used for the grinding rollers and disc liners, resulting in a long service life;
(5) High degree of automation: The automatic control technology adopts Siemens series PLC from Germany, equipped with an automatic control system, which can achieve remote control and is easy to operate. 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 land area is only 50% of that of a ball mill. It can be arranged outdoors, with low construction costs, directly reducing enterprise investment costs.
4. Stable product quality:
(1) The material stays in the grinder for a short period of 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 shape, narrow particle size distribution, good fluidity, and strong adaptability.
5. High reliability
(1) Adopting a grinding roller limiting 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 does not require a sealing fan, further reducing the oxygen content inside 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 has no dust leakage, basically achieving a dust-free workshop.