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Vertical Roller Mill In Cement Industry

Vertical Roller Mill In Cement Industry

Details of this product

Background Information

Vertical roller mill are widely used in cement production line.Building in modern cement production line, coal, raw meal grinding using vertical roller mill is more than 90%, cement clinker and slag grinding using vertical roller mill is more and more, so in modern cement plants, the vertical roller mill has become the important equipment factory process, this is a series of excellent features.
Modern vertical roller mill is began to develop from l906, has yet to be improved during the past hundred years, experienced by centrifugal force for roller pressure to the spring pressure, pressurized with hydraulic pneumatic spring system up to now.By grinding material from the soft to medium-hard coal cement raw material to the hard brittle cement clinker and slag.For cement industry, the invention of NSP kiln technology, double rotary kiln production and large scale, makes the structure of vertical roller mill has been continuously improved and large scale, so as to satisfy the requirement of a kiln with a mill.

The Production Process

Vertical roller mill by motor drive reducer and driven in mill, material is lock feeder wind from the inlet in the middle of the mill, hot air from the air inlet into the ground at the same time.As the rotation of mill material under the action of centrifugal force, the mill edge, after the ring groove on the mill roller rolling and crushing, after crushing material on the edge of the mill bring up by the wind ring of high-speed flow, larger particles directly into a millstone to grinding, flow of material through the upper separator under the effect of rotating rotor, coarse powder from the cone hopper fall to mill grinding, qualified fine powder with airflow grinding, through collecting dust collecting device, namely for the product, material containing water is in the process of contact with the hot air flow drying, by adjusting the hot blast temperature, can satisfy the requirement of different humidity material, to achieve the required product water.By adjusting the separator, different products can reach the required thickness.

The Advantage

  • Low investment costs: vertical mill set crushing, drying, grinding, sorting conveyor at an organic whole, the system is simple, compact layout, covers an area of about 50% of the same ball mill system, and can be open to decorate, so can reduce the investment cost a lot.
  • High grinding efficiency: vertical mill roller mill on direct rolling mill grinding materials, low energy consumption, and the same ball mill system compares and economizes 30% ~ 40% of energy consumption.
  • Drying ability: due to the hot air in contact directly with the material in grinding, vertical mill material drying ability is very strong, save energy, by adjusting the hot blast temperature, can satisfy the requirement of different humidity material.
  • Product quality is stable, because the material inside the mill stay time is short, easy to detect and control the product particle size and chemical composition, reduce duplication of grinding, stable product quality.
  • Easy maintenance: vertical mill hydraulic open system, can turn the rotation arm to replace the roller set, plate, etc., convenient and quick, reduce outage losses

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