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Main selection and process of coal powder preparation
Vertical mill preparation process for coal powder (one-step
preparation system)
This system combines drying and powder making simultaneously,
enabling simultaneous grinding and drying. Adopting LM series
vertical coal mills, the system is safe and stable, with low noise,
energy conservation and environmental protection.
The HVM series vertical coal mills, abbreviated as vertical mills
or vertical mills, are referred to as medium speed mills or
vertical mills in the field of coal powder preparation. It is a new
type of grinding equipment developed by Hefei Hengcheng, combining
modern technology with years of experience in grinding machine
manufacturing, in response to market demand. Its main technical and
economic indicators meet international requirements, achieving the
localization of international standard vertical mills.
Scope of application: Suitable for users with high requirements for
coal powder production.
Preparation of coal powder processing range: 5-100T/H.
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 Case of HVM Vertical Mill
Project name: 600t/d lime Rotary kiln production line
Project supply content: HVM1300M vertical mill coal powder preparation system process,
electrical automation design, and equipment manufacturing supply
Processing material type: high volatile and high moisture bituminous coal
Capacity: ≥ 11t/h
Product fineness: 200 mesh 97.4% passed