Coal grinding equipment is a special machine used to grind coal into powder. It is widely used in electric power, metallurgy, the chemical industry, building materials, and other industries. The following are some common coal grinding equipment and their characteristics:
1. Ball mill:
• Working principle: The motor drives the cylinder to rotate. The grinding media (such as steel balls) in the cylinder collide and grind the coal in the cylinder under the action of centrifugal force and friction, so that it reaches the required fineness.
• Features: Simple structure, reliable operation, easy maintenance, but relatively high energy consumption, and poor adaptability to coal types.
2. Medium-speed coal mill (MPS, MBF, etc. types):
• Working principle: The rotating grinding discs and grinding rollers are used to crush and grind the coal. At the same time, hot air is introduced to dry the pulverized coal and send it to the separator for particle size classification.
• Features: compact structure, small floor space, low power consumption, and low noise, but relatively poor adaptability to coal types and high maintenance costs.
• Working principle: High-pressure gas drives the suspension roller to rotate to grind and crush coal.
• Features: High grinding efficiency and uniform particle size distribution, but the equipment cost is high and the operation and maintenance requirements are high.
4. Vertical mill (such as LM type):
• Working principle: The coal is crushed and ground by the rotating grinding roller on the grinding ring. At the same time, hot air is introduced to dry the pulverized coal and send it to the classifier for particle size classification.
• Features: Small footprint, compact structure, low energy consumption, wide adaptability to coal types, but high equipment costs and maintenance costs.
5. Overpressure trapezoidal grinding:
• Working principle: It combines the advantages of a medium-speed coal mill and high-pressure suspension roller mill, and adopts a trapezoidal grinding roller and grinding ring structure to improve the grinding efficiency and fineness of coal powder.
• Features: high grinding efficiency, uniform particle size distribution, wide adaptability to coal types, but high equipment cost.
When selecting coal grinding equipment, it is necessary to comprehensively consider factors such as specific usage requirements, coal type characteristics, production scale, and investment budget. At the same time, attention should also be paid to the requirements for equipment reliability, safety, energy consumption, maintenance costs, and environmental performance.