Vertical grinding pairs have a three-dimensional structure compared
to ball mills, with a small footprint and strong completeness. They
form an independent production system from block materials to
finished powder. Compared to the horizontal structure, the complete
set is not strong, the connection is loose, and a single unit
occupies a large area. From block materials to finished powder, it
cannot form a production system on its own.
The two processes of grinding and powder selection can be achieved
through a single equipment, achieving an integrated investment
comparison between grinding and powder selection. Grinding and
powder selection need to be achieved through two separate equipment
and two processes to increase the investment cost of production
line equipment. Important components are made of high-quality
steel, and wear-resistant parts are made of high-performance
wear-resistant materials. The entire machine has high
wear-resistant performance, reliable operation, and long service
life of vulnerable parts Compared to the replacement of lining
plates and steel balls with high efficiency and wear resistance,
the replacement frequency is high, the cost is high, and the
production time is delayed, resulting in unnecessary shutdown
losses. The fineness of the finished powder is uniform, and the
screening rate can reach over 99%. The particle size of the
finished product is uneven compared to the fineness of the finished
powder, and the screening rate is relatively low. The noise during
production is relatively low, and the noise during production is
relatively high, which can easily affect the surrounding
residential areas.
Hefei Hengcheng Coal Vertical Mill integrates crushing, drying,
grinding, and grading transportation. The system is simple,
compact, and covers an area of about 50% of the ball milling
system. It can also be arranged outdoors, thus greatly reducing
investment costs. Moreover, the grinding roller directly crushes
and crushes the material on the grinding disc, resulting in low
energy consumption. Compared with the ball milling system, it saves
30% to 40% energy consumption and also reduces later operating
costs.
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 |
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
