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Objective:
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Technology:
Country:
Japan
Maturity:
In a vertical coal mill, drying, grinding, and separating/classifying of coal can be done simultaneously. Hence, production and energy efficiency is higher than those of a tube mill. The vertical coal mill works as follows:
- Wet coal is feed from the upper part or side of the mill onto the rotating table.
- It was then crushed and ground by the pressing of the steel roller.
- Fine coal particles are dried and swept away into the separator by a high velocity of hot air flow from the bottom of the mill.
- Separated fine coal particles are captured by a bag filter and used as fuel.
Benefits:
Reduction of electricity consumption for coal grinding: 20-25% compared with tube mill.
Co-benefits:
Productivity: higher compared with tube mill.
Differentiators:
n/a
Succes factors and requirements:
Thermal monitoring system or thermal control system are required in order to prevent coal firing. This technology is related to vertical mill applied to other process.
Countries where implemented:
India
Contact:
Ministry of Economy,Trade and Industry, Japan
Further information:
Content organisation: