Coal Pulverizing Equipment Vertical Mill Powder Vertical Grinding Machine
Product Introduction
Vertical coal mill, also known as coal mill and coal vertical mill, is an energy-saving pulverized coal production equipment, which is suitable for grinding raw coal, bituminous coal and other medium hardness materials. It can be widely used in power, metallurgy, building materials, chemical industry and other industries, especially in a large number of pulverized coal injection systems burning bituminous coal.
The vertical mill, also known as roller mill, is widely used in large-scale material grinding and ultra-fine grinding processing in cement chemical industry, coal, power industry and other industries. It is an ideal equipment in the grinding industry that integrates crushing, drying, grinding, grading and transportation. It can be used for coal powder preparation to make the product fineness meet industry standards.
[Application Field]
Building materials, chemical industry, metallurgy, electric power, coal powder preparation and other industries.
Applicable Materials
Bituminous coal, anthracite, lignite, etc.
Outstanding Advantages
1. High grinding efficiency and low power consumption;
2. Less metal consumption per unit product;
3. The process flow is simple, and the functions of material grinding, drying and powder selection are completed at the same time;
4. Small floor area, compact layout, light weight of system equipment, low investment in civil construction.
Technical DATA
| 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 |
【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.
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.
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Pulverizing Vertical Coal Grinding Mill 10 - 90 T/H Images
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