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Product Profile

LUM Series Ultrafine Vertical Grinding Mill is designed on the basis of many years’ experience in grinding mill production. It adopts the Taiwanese grinding roller technology and German powder separating technology. The ultrafine vertical grinding mill integrates ultrafine powder grinding, grading, powder collecting and transporting.

As the mid-to-high end processing equipment in plastic masterbatches, PVC, artificial stone, electric cable, non-woven fabrics and other industries, LUM Series Ultrafine Vertical Grinding Mill is widely used in grinding calcite, marble, limestone, talc, dolomite, barite, kaolin, wollastonite, gypsum, feldspar, pyrophylite and other non-metallic mineral ores.

Industrial Application

    1. Paper Making

    2. PVC

    3. Painting

    4. Plastics

    1. Talc

    2. Barite

    3. Calcite

    4. Dolomite

    5. Marble

    6. Kaolin

    7. Wollastonite

    8. Gypsum

    9. Limestone

    10. Pyrophillite

    11. Feldspar

LUM Grinding System

(1) Primary Milling System

This system mainly consists of crushers, conveyors of raw materials, ultrafine grinding and classifying devices, powder collectors, conveyors of finished products and other auxiliary equipment.

Crushing equipment: jaw crusher, hammer crusher etc.

Conveying equipment of raw materials: elevator, belt scale, surge bin, star-shaped feeding valve, spiral conveyer etc.

Ultrafine grinding and grading devices: main machine and multi-rotor classifier of ultrafine vertical grinding mill.

Transportation devices of finished products: spiral conveyer, discharge valve, elevator or pneumatic transport system etc.

Storage bin: final product tank

Auxiliary equipment: grinding aid additive system, cooling water system, compressed air system, iron separator etc.


(2) Secondary Classifying System

The system mainly consists of multi-rotor ultrafine classifier, fan, pulse filter, elevator, discharge valve, spiral conveyer and final product tank etc.

Main Structures of LUM Ultrafine Vertical Grinding Mill

Product Structure

LUM Ultrafine Vertical Grinding Mill is mainly composed of motor, reducer, body, roller, grinding disc, pressure device, powder concentrator, lubrication station and hydraulic station.

  • (1) Roller and millstone adopt imported wear-resistant material, making them have longer service life and lower maintenance cost.
  • (2) The grinding area between roller and millstone adopts unique grinding curve, ensuring the stable operation and efficient grinding.
  • (3) Hydraulic rod with adjustable elasticity coefficient is used to increase the pressure on the roller, ensuring the continuous grinding pressure on the raw material.
  • (4) LUM Ultrafine Vertical Grinding Mill adopts mechanical position-limiting device, so that there is no direct contact point between grinding roller and millstone, which can avoid the destructive impact caused by machine vibration.
  • (5) Multi-rotor cage-type powder concentrator has high efficiency. It's easy to be adjusted and controlled, which is helpful to achieve the fast switch among different production demands. Therefore, the efficiency of the whole production line can get improved.

Technological Process

The millstone rotates under the action of main motor and reducer. After being weighed on the belt scale, raw materials, along with the elevator, spiral conveyer, star-shaped feeding valve and feed screw, fall on the center of millstone, and then they move to the edge of millstone under centrifugal force. While passing through the grinding area between roller and millstone, raw materials will be pulverized by the pressure of roller and the shearing force between roller and millstone. Raw materials after grinding continue moving to the edge of millstone until they are brought into multi-rotor powder concentrator by the airflow of the high-pressure fan. Powders which fail to meet requirement of fineness fall on the millstone for re-grinding while the ones meeting the requirements enter the dust collector along with airflow, and are then transported to product bin by elevator or pneumatic transport system.

Product Advantages

1. Final products have advantages of size diversity and high added value

Equipped with high-efficiency multi-rotor powder concentrator, the machine can produce products in a variety of sizes. The content of 2μm powder can reach as high as 70%. The screen rate of particles which sizes are within 4—45μm can reach 97%. The specific surface area is around 21000cm²/g. The discharging rate of 8.5μm powder can reach 97%. 4-5μm powder can be separated by secondary powder collection.

The particle size distribution of final powder is precise, and the content of 2μm powder can be adjusted. And the final powder has fine shape, making it have high added value.

2. Higher grinding efficiency, lower power consumption

The optimized roller, millstone and inner airflow guidance design greatly improve the grinding efficiency. The capacity of LUM ultrafine vertical grinding mill is 30% higher than similar products and the power consumption is 30%-60% lower than ball mill.



3. Intelligent control system makes operation more stable and efficient

In order to display and adjust the parameters in real time, the internal part adopts PLC automatic control system and the external part adopts touch screen. The reserved modular interface has strong expansibility, which can quickly realize the connection between front-end grinding aid adding system and back-end powder modification system and packaging system, ensuring the automatic control of the whole process.



4. Long service life, low maintenance cost

All the wear-resistant parts of main machine adopt imported wear-resistant material, which effectively prolongs their service life and reduces the iron content in the products and decreases the maintenance costs.



5. Environment friendly

With new structural designs and grinding principle, LUM Series Ultrafine Vertical Grinding Mill has small vibration and low noise.

To meet the national environmental protection requirements, the whole equipment is sealed and runs under negative pressure. All the dust points are controlled by pulse dust filter, so no dust could overflow.

  • LUM Grinding Mill VS Other Grinding Mills
  • Parameters of LUM Ultrafine Grinding Mill
  1. Model/ item

    Characteristics of final products

    Equipment’s performances

    Pendulum grinding mill

    Powder of 2μm takes over above 6%.

    The fineness can reach 45μm.

    Low-end finished powder

    Suitable for production of coarse powder and some fine powder above 45μm;

    Stable, cost-effective, large noise;

    Hoop-roller grinding mill

    Powder of 2μm takes over above 20%.

    The finest powder can reach to 8-10μm.

    Mid-to-high end finished powder;

    Suitable for production of powder within 10-15μm;

    Stable, short service life of quick-wear parts, large noise, low production capacity;

    Ball mill

    Generally used for producing powder coarser than 45μm; ultrafine ball mill can produce powder finer than 10μm;

    Ceramic ball mill can produce powder with high fineness and whiteness and low iron content;

    Good particle size, globular shape;

    Suitable for various raw materials;

    Finished powder has wide particle size range;

    Many selections of grinding medium;

    High power consumption, large noise;

    Long switch time for different production demands;

    Difficult to adjust fineness;

    Jet grinding mill

    Suitable for producing powder finer than 5μm;

    Grinding materials under airflow force; finished powder has best whiteness;

    Suitable for production of high-end edible finished powder;

    Mechanical grinding; powder fineness is high;

    Only suitable for producing high-end or high added value powder;

    High power consumption, low production capacity;

    Ultrafine vertical grinding mill

    Powder of 2μm takes over 30%-70%;

    D97=4-45μm

    The fineness can reach 8.5μm after primary grinding;

    High specific surface area;

    No contact between roller and millstone; small vibration, stable operation;

    Low power consumption, large capacity;

    Fast switch among different production demands;

    Products are highly specialized;

    Large upfront investment;

    • LUM1125
    • LUM1232
    • LUM1436
    1. Assessment items Ultrafine ground calcium carbonate
      Capacity t 11.0~14.0 8.0~10.0 7.0~8.0 5.0~6.0 3.0~4.0
      Blaine cm2/g 11000±500 13500±500 15000±500 17000±500 19000±1000
      325mesh residue % 0.015 0.015 0.01 0 0
      <2um % 34 38 46 53 60
      Mean diameter: D50 um 4.2 3.0 2.4 1.8 1.4
        mesh 600 800 1250 2000 2500
      Size distribution: D97 um 30 25 20 15 9
      Size cut um 80 48 38 28 18
      Moisture % < 0.3 < 0.3 < 0.3 < 0.3 < 0.3
      Power KW/Ton 38~40 40~50 47~53 50~53 110~125
      Test method

      1. Size distribution: The data is based on MALVERN company's MALVERN3000 laser winding particle size analyzer.
      2. Blaine: Transfer from size distribution, unit is a relative area of 1 g of powder
      3. Mean diameter: derive from size distribution
      4. 325mesh residue: 1000 g sample was placed on a 325 mesh screen by wet method,
      5. Moisture: 5 g of the sample was measured at a moisture analyzer at 6℃ for 6 minutes
      6. Grinding material: limestone, calcite, dolomite, talc, barite, wollastonite, brucite, calcium hydroxide, gypsum, coking coal, slag, phosphate and so on.

    2. Assessment items Ultrafine ground calcium carbonate
      Capacity t 13.0~17.0 11~13 9.0~10.0 7.0~8.0
      Blaine cm2/g 11000±500 13500±500 15000±500 17000±500
      325mesh residue % 0.015 0.015 0.01 0
      <2um % 34 38 46 53
      Mean diameter: D50 um 4.2 3.0 2.4 1.8
        mesh 600 800 1250 2000
      Size distribution: D97 um 30 25 20 15
      Size cut um 80 48 38 28
      Moisture % < 0.3 < 0.3 < 0.3 < 0.3
      Power KW/Ton 38~40 40~50 47~53 50~53
      Test method

      1. Size distribution: The data is based on MALVERN company's MALVERN3000 laser winding particle size analyzer.
      2. Blaine: Transfer from size distribution, unit is a relative area of 1 g of powder
      3. Mean diameter: derive from size distribution
      4. 325mesh residue: 1000 g sample was placed on a 325 mesh screen by wet method,
      5. Moisture: 5 g of the sample was measured at a moisture analyzer at 6℃ for 6 minutes
      6. Grinding material: limestone, calcite, dolomite, talc, barite, wollastonite, brucite, calcium hydroxide, gypsum, coking coal, slag, phosphate and so on.

    3. Assessment items Ultrafine ground calcium carbonate
      Capacity t 14.0~19.0 12.5~14.5 10.0~11.0
      Blaine cm2/g 11000±500 13500±500 15000±500
      325mesh residue % 0.015 0.015 0.01
      <2um % 34 38 46
      Mean diameter: D50 um 4.2 3.0 2.4
        mesh 600 800 1250
      Size distribution: D97 um 30 25 20
      Size cut um 80 48 38
      Moisture % < 0.3 < 0.3 < 0.3
      Power KW/Ton 38~40 40~50 47~53
      Test method

      1. Size distribution: The data is based on MALVERN company's MALVERN3000 laser winding particle size analyzer.
      2. Blaine: Transfer from size distribution, unit is a relative area of 1 g of powder
      3. Mean diameter: derive from size distribution
      4. 325mesh residue: 1000 g sample was placed on a 325 mesh screen by wet method,
      5. Moisture: 5 g of the sample was measured at a moisture analyzer at 6℃ for 6 minutes
      6. Grinding material: limestone, calcite, dolomite, talc, barite, wollastonite, brucite, calcium hydroxide, gypsum, coking coal, slag, phosphate and so on.

Customer Case

Hubei 80,000TPY Calcite Grinding Project

The process is presented in accordance with the standard process or layout

Working condition

Project Address: Hubei, China

Material: Calcite

Capacity: 80000TPY

Input Size: Below 10mm

Output Size: 600-800mesh

Daily Operation: 10h

Equipment: LUM1125 Ultrafine Vertical Grinding Mill

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