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vertical roller mill

vertical roller mill

【Day operation】: 24 hours

【Feed】: Limestone, particle size 20-40mm,

【Products】: 200 mesh, 80% screening rate

【Production】: 480 tons / hour

LM series vertical roller mill structural components

The grinding machine produced by Shibang has strong single-machine operation and compact structure. The main components of Shibang LM series vertical roller mill include powder separator, grinding roller device, grinding disc device, pressing device, reducer, motor and housing. The main function of the grinding roller device is to crush and crush the material to ensure the finished material. The fineness separator is two efficient and energy-saving powder sorting devices. The grinding disc device is fixed on the output shaft of the reducer, and the grinding roller is used to grind the material. The pressing device is to produce different breaking strength of the material by changing the pressure of the grinding roller according to the hardness of the material and the standard of the finished product.

LM series vertical roller mill product advantages

1. Low investment cost and high economic efficiency

The strong advantage of vertical roller mill is reflected in the single machine can achieve crushing, grinding, grading and drying. The two machines are multi-purpose. The two vertical roller mills cover 50% of the ball mill, plus can be arranged in the open air, which greatly saves Investment in equipment and site construction of the production line.

vertical roller mill

2, vertical roller mill running cost is low

Compared with the ordinary milling equipment, the vertical roller mill directly grinds the ground material on the grinding disc by the grinding roller, saving energy consumption by 30% to 40%, and the grinding efficiency is high per unit time; in the structural design, the high-quality wear-resistant material is used. The grinding roller is made, and the grinding roller is not in direct contact with the grinding disc, and the fitting has a long service life.

vertical roller mill

3, strong drying ability, good finished product size

The vertical grinding equipment has a dryer for the material, and the hot air is directly in contact with the material in the grinding, and the drying ability is strong. At the same time, according to the user's requirements for materials with different humidity, the hot air temperature can be manually adjusted.

4, the equipment is simple to operate, stable operation

The vertical grinding automation control level is high, and the remote control reduces the difficulty of equipment operation. The LM series vertical roller mill design has a device to prevent direct contact between the roller sleeve and the disc liner, effectively avoiding damaging shock and severe vibration caused by high hardness materials.

vertical roller mill

5, the quality of finished materials is stable

The advanced milling principle, the material has a short residence time in the grinding, easy to detect and control the particle size and chemical composition of the product, so as to avoid repeated grinding, so the finished product has a very good grain size.

6, easy maintenance

Simply flip the rocker arm and replace the roller sleeve and liner to make it quick and easy. At the same time, it reduces downtime and saves labor costs.

LM series vertical grinding working principle

The realization of the LM series vertical grinding process is that the motor drives the grinding disc and the grinding roller to crush and crush the material. The motor drives the grinding disc to rotate through the reducer, and the material falls from the feeding port to the center of the grinding disc through the lock air feeder, and the hot air enters. The tuyere enters the mill. When the grinding disc rotates, the material is crushed by the grinding roller under the action of centrifugal force. The pulverized material is brought up by the high-speed airflow of the wind ring at the edge of the grinding disc, and the broken broken material is returned to the grinding disc for re-grinding. The coarse powder falls from the cone to the grinding disc and is re-grinded. The qualified fine powder is ground with the airflow and collected by the dust collecting device. The moisture-containing material is dried during contact with the hot gas stream. By adjusting the hot air temperature, the requirements of different humidity materials can be met to achieve the desired product moisture. Product thickness adjustment can be done through the separator to fully meet the user's production standards for materials.

vertical roller mill

LM series vertical roller mill equipment analysis

(1) The grinding pressure of the vertical roller mill comes from the pressing force of the grinding roller and the grinding disc on the material layer.

The principle of material layer grinding is a major factor in the high comprehensive performance of vertical roller mill equipment. The pressure of the grinding roller should be determined according to the material's wearability, moisture, required output, mill inner wind speed and vertical roller mill model and specifications. Adjustment. Users should judge according to their own industry nature and materials, reasonably adjust the parameters in the vertical roller mill, and achieve a win-win situation between the output and the economic benefits of the enterprise.

(2) Vertical mill grinding efficiency is related to the thickness of the layer

In order to achieve a production rate of 10-55 tons per hour, the LM series vertical roller mill must maintain enough contact surface with the material between the grinding roller and the grinding disc, and the thickness of the material layer should be appropriate. The fluidity of the dry material on the grinding disc is relatively high. In order to improve the stability of the material layer, the grinding of the unstable material layer can be realized by automatically adjusting the grinding roller pressure or taking the water spray humidification method.

(3) The integrity of the vertical roller mill grinding powder selection

The LM series vertical roller mill integrates crushing, drying, grinding and grading and conveying. The system is simple and compact. It covers an area of ​​about 50% of the ball mill system and can be arranged in the open air, thus reducing a large amount of investment costs. After the grinding process of the material is finished, the material moves from the center to the edge of the grinding disc under the centrifugal force, and is blown up by the high-speed airflow of the gas ring mouth, and the fine particle material is brought to the classifier, and the finer particles are selected. The coarser particles settle from the gas stream to the grinding disc, and the grinding and powder sorting processes are integrated, which greatly improves the efficiency of powder processing.

Technical Data

 

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