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

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