lm series vertical roller mill is an advanced grinding machine, which integrated with drying, milling, grading and transporting. this series vertical mill has the high grinding efficiency, meaning a 50% reduction in per-unit power consumption over ball mills. the particle size adjustments of this vertical roller mill are simple, with minimal noise and vibration. the working environment is also protected with measures to prevent particle escape. it is the high standard mill which can meet the high capacity of powder producing request. lm vertical rolleris widely used in cement, powder station, metallurgy, chemical and non-metal industry.
comparing with other common roller mills, the compact lm series vertical roller mills has the space-saving design, reducing the civil construction costs.
already be proven commercially, the lm series vertical mill presents a major advance in roller mills for finish grinding process. comparing with other common roller mills, the compact lm series vertical mills has the space-saving design, reducing the civil construction costs.
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used vertical roller mill working principle
the motor drives the grinding table through decelerator. the materials fall down the center of grinding table from feed opening. at the same time, hot air comes into the mill from the air inlet. due to the centrifugal force, materials move to the edge of the grinding table. the materials are pulverized by the roller when by pass of the groove on the grinding table. the crushed materials are brought up by vane high-speed airstream, the larger particles fall down to the grinding table for regrinding. when the materials in the airstream pass the separator on the top of the mill , the coarse powder fall down the grinding table for regrinding under the function of rotation rotor. the fine powder comes out with the airstream , and is gathered by the dust catcher. the materials content with moisture will be dried when they meet the hot airstream. through adjusting the temperature of the hot airstream, it can meet different material’s requirement, and also through adjusting separator , it can reach proper fineness of materials.
used vertical roller mill structure & features
lm series vertical roller mill (roller mill) is mainly from the separator, roller device, disc device, pressure device, reducer, motor, housing and other components. separator is an efficient, energy-efficient separator device. roller for rolling the material is used to crush the parts. disc fixed to the reducer output shaft is the place where roller compacted material. pressure device is provided for the grinding pressure roller components, to provide sufficient pressure roller to crush material.
1. grinding efficiency, operating costs: vertical mill grinding using principle of grinding the material layer materials, low energy consumption, grinding system and lower power consumption than the ball 20 to 30%, and with the increase of raw materials, water, energy-saving effect is more significant;
2. construction, investment, low cost, no other set drying, the powder, and other equipment to enhance;
3. run easy, reliable, easy operation and maintenance, is equipped with automatic control device, which enables remote control, easy to operate;
4. equipment drying capacity, grinding materials widely;
5. product quality and uniformity of particle size distribution;
6. equipment, environmental protection, low noise, low dust, clean operating environment.
used vertical roller mill technical data
|turnplate diameter (mm)||1300||1500||1700||1900||2200||2400|
|final product size||μm||170~45||170~45||170~45||170~45||170~45||170~45|
|final product water percentage||≤1%||≤1%||≤1%||≤1%||≤1%||≤1%|
|max. input size (mm)||<38||<40||<42||<45||<50||<55|
|best water percentage of raw material||<4%||<4%||<4%||<4%||<4%||<4%|
|drying needed if water percentage is more than||<15%||<15%||<15%||<15%||<15%||<15%|
|input wind temperature (℃)||<350||<350||<350||<350||<350||<350|
|output wind temperature (℃)||70~95||70~95||70~95||70~95||70~95||70~95|
|main motor power (kw)||185~220||250~280||355~400||450~500||710~800||800~900|
|overall dimension||l mm||3500||4200||4700||8500||10200||11700|
used vertical roller mill projects
vertical grinder used in grasberg mine concentrator :
located some 60 miles north of timika, at tembagapura in irian jaya – the most easterly of indonesia’s provinces – on the western half of the island of new guinea, the grasberg mine has the world’s single largest known gold reserve and the second largest copper reserves. with years of working experience in grinding equipments research, sbm developed lv series vertical roller mill with two types: vertical and vertical ore mill. the high performance vertical grinding machine featured with high capacity, long service time and high efficiency and is your ideal choice.