Intelligent Grinding Mill Equipment

CLMS Intelligent Vertical Roller Grinding Mill

CLMS Intelligent Vertical Roller Grinding Mill integrates fine crushing, drying, powder grinding, powder selecting and conveying as a whole, with features of small occupied area...

Product Specifications

Working principle
Motor drives millstone rotating through reducer, while hot air from outlet blows into the vertical roller grinding mill, and materials from feed opening flow into millstone center. Due to centrifugal force produced by millstone rotating, materials move to edge from the millstone center and are grinded by roller when go through the millstone ring groove. The grinded materials continue to move to millstone edge until being blown away by the airflow which ejected from wind ring. The larger particles which didn’t taken away by airflow will fall down from the space between millstone and wind ring and then be discharged out of the slag hole by material scraping board. The fine powder will be separated by the rotating rotor when they are blown into separator by the airflow. Coarse particles will be hit and fall down back to the millstone, continuing to be grinded and crushed. Qualified fine powder is discharged through separator with airflow into dust collector. The collected powder is rightly the final qualified products grinded by vertical grinding mill. The materials are being dried during contact with hot air in the mill body, to reach the required moisture content. The product fineness can be adjusted by the separator.

Main structure and function
Vertical roller grinding mill is mainly composed of powder separator, grinding roller device, millstone device, transmission device, pressure device, lubricating hydraulic device, non-standard structures and so on.
Main function of powder separator is to separate the qualified grinded powder from the grinding mill. It is a key part to determine the product fineness. It is composed of housing, rotor, transmission device, guide blade, blanking cone bucket and so on.
Grinding roller device is the main part for material mechanical grinding. It is installed on pressure arm and support seat. Under the action of pressure device, it is tightly pressed on materials on the millstone, and rotated by the rotating materials on the millstone. Material bed is formed by the unevenly distributed materials on the millstone, and the materials in the circular arc groove on material bed are grinded by the rollers and millstone liners.
Transmission device is the main component to transfer powder. It consists of motor, reducer, coupling and so on.
Pressure device is composed of hydraulic station, oil cylinder and connecting pipes. Oil pressure produced by hydraulic station is passed to mill roller through hydraulic cylinder to generate grinding force, which has effect on materials on the material bed to realize material grinding.
Lubrication device provides lubrication oil for the reducer which drives the millstone, to make sure reliable lubrication and normal working.

Advantages of CLMS Intelligent Vertical Roller Grinding Mill
1. Vertical roller grinding mill has high-efficiency and lower power consumption by grinding materials between grinding rollers and material bed. Unit powder consumption of powder grinding system is 20-30% lower than ball mill, and with the increase of material moisture, the energy saving effect will be more obvious.
2. Strong drying capacity. Vertical roller grinding mill conveys materials by airflow. When grinding materials with high moisture, the grinding mill can control inlet air temperature to make the finished products achieve the required moisture. 12-15% materials can be dried in vertical roller grinding mill.
3. Large feeding size. The material feed size can be up to about 5% of grinding roller diameter (generally in 25-100mm). Therefore, the middle or large vertical roller grinding mills don’t need the secondary crushing at all.
4. Stable chemical composition of finished product and uniform particle size distribution. Since the materials stay in the vertical roller grinding mill only 2 ~ 3 minutes(normally the ball mill system will keep 15 ~ 20 minutes), the chemical composition of the finished products can be detected and corrected quickly and with small fluctuation, which is conducive to homogenization. In addition, the qualified fine powder can be separated timely to avoid grinding repeatedly. Uniform product size is advantageous to the calcination.
5. Simple process flow, small occupied area and construction space. Vertical roller grinding mill is self-equipped with powder separator, and there is no need of additional classifier and accessory device. Grinded powder blown by airflow can enter into dust collector directly to be collected as final products. Therefore, the process is simple, layout is compact, occupied area is only 70% of the ball mill and construction space is only 50-60% of the ball mill.
6. Low noise, little flying dust and clean operation environment. The grinding rollers will not contact directly with millstone in working, so compared to ball mill, there is no mutual collision among grinding balls, and mutual collision between the grinding balls and the ball mill body. Therefore, vertical roller grinding mill works with low noise of 20-30 DB lower than the ball mill. Moreover, the vertical roller grinding mill is overall sealed and working under negative pressure system, which contributes to little flying dust and clean operation environment.
7. Less metal abrasion, longer service life of the liners and rollers. There is no direct contact or collision between metal and metal in working, therefore, the wearing parts have less abrasion and longer service life. The metal abrasion of unit finished products is generally 5-10 g/t. For hard materials, the service life of roller and liners can be up to 8000 hours.
8. Convenient maintenance. The roller collar can be turned to the outside of grinding mill by rocker arm, so it can be replaced in very short time.

Intelligent Functions
a.Intelligent Control on the Feeding Quantity.
b.Real time monitoring on the inlet wind pressure, outlet wind pressure and classifier rotating speed are executed, so that the product fineness can be controlled freely as wanted.
c.Real time monitoring on the abrasion of the grinding rollers is executed, so that a reminder for replacement can be released in time.
d.Real time monitoring on the bearing temperature is executed to discover abnormal conditions in time and execute timely maintenance, so that the service life of the bearings can be prolonged.
e.Real time monitoring on the hydraulic oil pressure is executed, so that the pressure of grinding rollers can be adjusted conveniently.
f.The equipment has networking function.

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