Bentonite is a water-containing clay ore mainly composed of montmorillonite. The main indicators of its raw ore quality are generally montmorillonite content, blue absorption and colloidal price.

Bentonite production process
1. Crushing
The Mohs hardness of bentonite is 1 to 2. It is a soft non-metallic mineral and can be initially crushed.
2. Drying
Natural or heated drying can be used to remove moisture (water content ≤ 12%-6%). In order to prevent the performance of bentonite from changing due to structural changes of montmorillonite, the drying temperature should be lower than 250 ℃, and the time should not be too long.
3. Grinding
In order to meet the requirements of high fineness of bentonite in industries such as paper, plastic and rubber products. Bentonite grinding equipment usually can choose European version mill, super-pressure trapezoid mill and vertical mill for grinding.
4. Packaging
The finished materials are packaged and sent to the market.

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Preparatory stage before grinding
Pre-preparation stage before calcite grinding generally includes two steps. For the preparation of calcite, the calcite first needs to be washed with water to remove impurities, dried and sent to the raw material warehouse; the second is the pre-crushing stage, which is generally divided into one-stage crushing and two-stage crushing according to the needs of users and different subsequent processes. , First use the jaw crusher for rough crushing, and then if the particle size is too large to meet the maximum feeding particle size of the subsequent grinding equipment, secondary crushing is required. In the secondary crushing, a cone crusher or a counterattack type is generally used. The crusher performs fine crushing of the calcite, so that the crushed materials are sent to the raw material storage by the bucket elevator for use.

1. Thin Oil Lubricating Grinding Roller

Grinding roller of MB5X mill adopts thin oil lubrication. It is a technology initiated domestically which is maintenance-free and easy to operate. Thin oil lubrication is oil bath lubrication, more convenient than grease lubrication since no frequent oil-adding, and it needs lower maintenance cost.

2. No Shovel Blade Cylinder

There is no shovel blade cylinder in the grinding chamber, so ventilation area is larger and air-conveying resistance is smaller. Besides, use of large-diameter grinding roller improves the grinding efficiency directly.

3. Volute Elastic Damping Structure

Volute elastic damping structure can effectively reduce vibrating damage on the host. Between the volute and engine base, special elastic structure is applied, and in combination with setup of rubber shock pad, it could directly avoid influence of vibration of engine base on operating stability of powder concentrator, and completely eradicate the problem of shatter crack of volute and central engine due to vibration of engine base.

4. Automatic Oil-temperature Detecting Device

The host reducer is equipped with oil-temperature detecting system and heating unit, and according to the pre-set requirements, it could operate automatically under low temperature, ensuring the safe operation of host lubricating system.

5. Mesh-type Grinding Roller Hanger

Grinding roller hanger applies unusual mesh design to increase the ventilation area of the grinding chamber. This design could directly improve material-conveying efficiency while lowering the windage.

6. New Cage-type Powder Concentrator

Powder concentrator adopts low-resistance hanging cage-type powder concentrator. The advantages of this powder concentrator lies in its high efficiency and low energy consumption. Processing same kind of materials and requiring same fineness, this powder concentrator needs less electricity but it can bring higher capacity compared to the blade-type powder concentrator.

7. Integral Wear-resistant Shovel Plate

Integrated wear-resistant shovel plate could improve the durability and lower use cost of quick-wear parts. Air-intake volute is redesigned by applying wear-resistant liner, which can directly improve service life of the volute in multiples.

8. Humanized Transmission System

Transmission system of powder concentrator applies concentrated lubricating system. The system could operate automatically according to setup without shutdown and manual operation.

MTW European version mill, LM vertical mill, slag vertical mill and other fine powder processing equipment are high value-added products independently researched and developed by our company. Bentonite and other materials are ground to 20-400 mesh. It is your right-hand man in the field of industrial pulverization such as power plant desulfurization, coal powder preparation, and heavy calcium processing.

Bentonite pulverizing project
Project Status
Equipment model and number: 3 MTW178G European version mills

Processing materials and fineness: Bentonite, 180-200 mesh

Output: ≥15T/H

If you have any needs or questions, please leave a message, and we will reply to you as soon as we receive it!

Feed size: ≤30mm

1.Reduce wearing of lubrication parts

All lubricating oil should be completely discharged when the mill is put into continuous operation for one month, thoroughly cleaned and replaced with new oil. In the future, the oil should be changed every 6 months in combination with the medium repair. The lubrication and oil level of each lubrication point should be checked regularly.

2.Keep spindle temperature appropriate

When the mill is running, pay attention to the temperature of the lubricating oil of the main bearing. When the mill is running normally, the temperature rise of the transmission bearing and the reducer is lower than 55 °C, and the height is not more than 60 °C.