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In the field of coal powder grinding, vertical grinding machines
are common professional grinding equipment.
1. Introduction to the Principle of Vertical Coal Mill
Vertical mill is a specialized coal mill equipment, and the process
principle mainly includes four steps: crushing, grinding, grading,
and powder collection.
Working principle: The electric motor drives the grinding disc to
rotate through a reducer, and the material falls into the center of
the grinding disc from the feeding port. At the same time, hot air
enters the grinding chamber from the air inlet. Under the action of
centrifugal force, the material moves towards the edge of the
grinding disc and is crushed by the grinding roller when passing
through the circular groove on the grinding disc. The crushed
material is carried up by the high-speed airflow at the edge of the
grinding disc, and large particles directly fall onto the grinding
disc for re grinding. When the material in the airflow passes
through the dynamic and static separator, under the action of the
rotating rotor, the coarse powder falls onto the grinding disc for
re grinding, and qualified fine powder is discharged with the
airflow, Collect in the powder collection device, which is the
product. Materials containing moisture are dried during contact
with hot gases to achieve the required product moisture.
Parameter Table of Coal Vertical Mill
| Specification | HVM1250 | HVM1300 | HVM1500 | HVM1700 | HVM1900 | HVM2200 | HVM2400 | HVM2800 |
| Grinding table median diameter(mm) | 1250 | 1300 | 1500 | 1700 | 1900 | 2200 | 2400 | 2800 |
| Capacity(t/h) | 10-15 | 10-15 | 14-22 | 20-28 | 26-35 | 35-45 | 45-56 | 70-90 |
| Coal Moisture(%) | ＜15 | |||||||
| Coal Power Fineness(%) | R0.08=2-12 | |||||||
| Coal Power Moisture(%) | ≤1 | |||||||
| Main Motor Power(kw) | 110/132 | 160/185 | 220/250 | 315/355 | 400/450 | 450/500 | 560/630 | 900/1120 |
2. Advantages and characteristics
As a specialized equipment for grinding coal powder, this grinder
is equipped with explosion-proof devices and anti-static treatment
devices, and is equipped with a full pulse dust collection system.
The process flow is scientific and reasonable, making it an ideal
equipment for grinding coal powder.
Advantage 1: Low investment
It integrates crushing, drying, grinding, grading, and conveying,
with a simple process flow, fewer system equipment, compact
structural layout, and local construction, reducing enterprise
investment costs.
Advantage 2: Easy to maintain
The replacement of the roller sleeve liner and the maintenance of
the mill have a large space, making the maintenance work very
convenient;
Advantage 3: Reliable performance
The grinding roller limit device operates more smoothly and can
avoid vibration caused by material breakage. Adopting a new type of
grinding roller sealing device, the sealing performance is more
reliable.
Advantage 4: High degree of automation
Adopting a PLC fully automatic control system, remote control can
be achieved, making operation more convenient.
Advantage 5: High grinding efficiency
Grinding efficiency is high, energy consumption is low, and the
production capacity of a single machine is greater, which can
utilize low valley electricity.
Advantage 6: Good quality of finished products
The finished product has uniform and fine particle morphology,
narrow particle size distribution, good flowability, strong product
adaptability, and higher whiteness and purity.
Machine Parts
Engineering Cases
Engineering Design and Equipment Manufacturing Supply of HVM2800M
Vertical Pulverized Coal Preparation System
Processing material type: bituminous coal
Capacity: ≥ 80t/h
Product fineness: 200 mesh, 85% pass
