Hefei Hengcheng Industrial Equipment Technology Co., Ltd |
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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
Model | HVM1250 | HVM1300 | HVM1500 | HVM1700 | HVM1900 | HVM2400 | HVM2500 | HVM2800 |
Grinding Table Median Diameter(mm) | 1250 | 1300 | 1500 | 1700 | 1900 | 2400 | 2500 | 2800 |
Capacity(t/h) | 6~9 | 9~13 | 15~20 | 24~32 | 26~35 | 36~45 | 45~58 | 56~80 |
Material Moisture | ≤5% | |||||||
Limestone Powder Fineness | 325 mesh (44um) 90% passed | |||||||
Main Motor Power(kw) | 110/132 | 185/200 | 250/280 | 355/400 | 450/500 | 450/500 | 710/800 | 1120/1250 |
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.