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
Materials that can be processed by HVM vertical mill: ferrite, slag, slag, cement, diamond, iron ore, chrome ore,
manganese ore, gold mine, copper mine, aluminum ore, lead zinc ore,
tantalum niobium ore, polymetallic ore, nickel ore, bauxite,
silicon carbide, titanium dioxide, talc, bentonite, Calcite,
kaolin, graphite, mica, Wollastonite, feldspar, dolomite,
Pyrophyllite, quartz sand, fluorite, limestone, organic silicon,
lithium limestone Shale, Volcanic ash, coal, etc.
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, materials move towards the edge of the grinding
plate. When passing through the circular groove on the grinding
plate, they are crushed by the grinding roller. The crushed
materials are picked up by the Jet stream at the wind ring at the
edge of the grinding plate. Large particles fall directly onto the
grinding plate for grinding again. When the materials in the
airflow pass through the dynamic and static separator, under the
action of the rotating rotor, the coarse powder falls onto the
grinding plate for grinding again. The qualified fine powder is
grinded together 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 |
Vertical grinding machines have advantages such as high grinding
efficiency, low power consumption, large feed particle size, easy
adjustment of product fineness, simple equipment process flow,
small floor area, low noise, small dust emission, easy use and
maintenance, low operating costs, and low consumption of
wear-resistant materials.
It can be widely used in power, metallurgy, cement, chemical
industry, non-metallic ore and other industries, mainly for
grinding raw cement, clinker, desulfurization limestone powder of
power plant, slag powder, manganese ore, gypsum, coal, Baryte,
Calcite, bauxite and other materials.
The vertical mill system consists of a host, feeder, classifier,
blower, pipeline device, storage hopper, electric control system,
collection system, etc. Design and manufacture a standardized
modular pressure device. As the production capacity of the vertical
mill increases, the number of grinding rollers of the vertical mill
can be correspondingly increased. A motor driven reducer can be
used to drive the grinding disc to rotate. The material moves
around the grinding disc under centrifugal force and enters between
the grinding rollers and the grinding disc. Under the pressure of
the grinding rollers, the material is crushed due to compression,
grinding, and shear forces, The ground powder is blown by the
airflow of the blower to the classifier above the main machine for
screening. Those particles that are too coarse still fall into the
main machine for re grinding, while those that meet the
specifications of fineness flow into the pulse dust collector with
the wind. After collection, they are discharged through the powder
outlet pipe to form the finished product. The purified airflow
flows into the blower through the pipeline on the pulse collector
and is discharged into the atmosphere.
