Fine Roller Ball
Friday, March 25th, 2011
LM vertical roller milling machine features and technology
Many kinds of raw material grinding equipment, from the total in the form of point of view, can be divided into ball mill and vertical roller mill. View of the ball mill energy consumption shown serious, growing problem of maintenance and complex, large vertical roller mill choice of a new direction.
Vertical roller mill is the cement industry, coal, electricity and other departments widely used as a milling machine equipment. With a small footprint, low power consumption, noise, process simple, compact layout, centralized pieces, drying, grinding, the powder as one of the advantages of a modern cement raw material grinding device of choice. Development of the world’s first vertical roller mill is the Federal German Loesche (Loesche) company in 1925 to have a more mature design. Through continuous development and improvement, and the biggest LM63.4, production reached 840t / h, disc diameter of 6.3m, installed power of 5600kW, the four rollers.
With the involvement of cement production line in China more and more enterprises, vertical roller milling machines and other technology in China gradually catch up with the world advanced level. At present, advanced technology, vertical roller mill machine manufacturer Machinery Co., Ltd. Shanghai World production is also a state that LM vertical roller milling machine, while the Shanghai World states in the production process more attention to customer feedback and product performance.
After a long-term development, the Shanghai World State Machinery Co., Ltd. Consolidated other vertical roller mill equipment design LM vertical roller mill, compared with other grinding equipment, vertical roller mill has the following features.
- 1. The grinding efficiency, the use of material bed crushing squeeze principle, the material in the milling machine by rolling, shear, impact effect. Mill pulverized material can flow out in time to avoid over-grinding, the material in the mill residence time is generally 2-4rain, ball mill grinding efficiency is 165%, power consumption can be reduced about 30%.
- 2. Drying efficiency, hot air jet from the annular slit people, high wind speed, a large section of the mill ventilation, the resistance is small, kiln preheater using waste gas can be dried material moisture content of 8%, if water can be drying stove 15% to 20% of the material.
- 3. Grinding particle size were large, generally up to 5% of roller diameter, particle size up to large weary 150 ~ 200mm, equipment technology, superior performance, single yield, high rate of equipment operation, metal wear and tear than the lower ball .
- 4. Grinding materials, adaptability, can be used for grinding a variety of raw fuel, such as limestone, sandstone (Si02> 90%), coal, cement clinker, blast furnace slag. Regardless of grindability, how different abrasive, by mill and reasonable operation of internal restructuring, can produce different fineness, different specific surface area of the qualified products.
- 5. The process is simple, compact layout, routine maintenance costs low, open-air settings, investment in infrastructure is about 70% of the ball mill.
- 6. The overall performance sealed, dust, low noise and environmental advantages.
- 7. Product quality control fast, adjust the product flexible and easy to achieve operational intelligence, automation.
- 8. The disadvantage is not suitable for vertical roller mill grinding hard and abrasive materials, a large, worn parts expensive than the ball, but they replaced the ball mill, elevator, separator and other equipment compared to the total amount of maintenance is still appears to maintain a simple, easy and small amount of work.
About the Author
If you want to know more about other grinding mill and crusher, please contact me.
The Blackberry Trackball adjustment on magnetic roller to work fine
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