High Capacity Coal Vertical Mill Drying Grinding And Separating

High Capacity Coal Vertical Mill / Coal Grinding Mill/ Coal Powder Making Machine

Product Introduction

HVM vertical mill is a comprehensive large-scale grinding equipment that integrates five functions of crushing, grinding, powder selection, drying and material transportation. It is characterized by centralized process flow, small floor area, low investment, high efficiency, energy conservation and environmental protection.

Product Advantages

Feed size

0-90mm

Capacity

10-90 t/h

Applicable materials

Limestone, calcite, dolomite, petroleum coke, gypsum, barite, marble, talc, coal powder, etc

High material purity

HVM vertical mill can effectively control the product particle size, chemical composition and product iron content, and ensure the purity and whiteness of finished materials.

Less comprehensive investment

The HVM vertical mill adopts a compact integrated design, covering an area of about 50% of the ball milling system, and can be arranged in the open air with less comprehensive investment.

High automation

HVM vertical mill is equipped with automatic control system, which can realize the free switch between remote control and local control. It is easy to operate and has low labor cost.

More environmentally friendly operation

HVM vertical pulverizer is integrally sealed and operates under negative pressure, without dust overflow; Small equipment vibration and low operation noise; Production is more environmentally friendly.

【Working principle】: the motor drives the grinding plate to rotate through the reducer, the material falls in the center of the grinding plate from the feed port, and the hot air enters the mill 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 carried away at the edge of the grinding plate by the high-speed airflow at the wind ring. Large particles directly fall onto the grinding plate for re grinding. When the materials in the airflow pass through the dynamic and static separators, under the action of the rotating rotor, the coarse powder falls onto the grinding plate for re grinding. The qualified fine powder is grinded together with the airflow, The product is collected in the powder collecting device. Materials containing water are dried in the process of contacting with hot gas to reach the required product moisture.

Technical DATA

Scheme Introduction

HVM vertical mill can handle materials with high water content from 20% to 30% (such as calcium carbide slag, lignite, etc.) to materials with water content less than 1% (cement clinker, etc.), and has strong adaptability to material water.

Solution

For the treatment of materials with high moisture content, the drying capacity of vertical mill is highly required. The drying capacity of vertical mill should be taken as an important direction of equipment selection. Through the heat balance calculation of the vertical mill process system, the grinding, drying and powder selection capabilities of vertical mill should be scientifically and rationally matched. On the premise of ensuring that the materials meet the drying requirements, the grinding and powder selection output should be given full play to the best level, so as to achieve reliable, efficient Energy saving;

For the treatment of low moisture materials, since the vertical mill is essentially a material bed grinding, when the moisture of the materials to be grinded is too low, it is difficult to form a stable material layer on the grinding plate after the materials enter the vertical mill, which will cause abnormal vibration of the vertical mill and make it unable to operate stably. In order to ensure the stable operation of the vertical mill, it is necessary to solve the problem of how to stabilize the material layer. Generally, the measures that can be taken include active means (such as controlling and adjusting the thickness of the material layer, grinding pressure, height of the retaining ring, slag discharge, etc.) and passive means (such as adding water sprinklers, etc.). On the premise of giving priority to ensuring the grinding capacity, reasonable consideration should be given to the powder selection capacity of the vertical mill.