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Bentonite Raymond mill2020-05-13

Bentonite is widely used in building materials as a thickener and binder due to its expansibility and water absorption. Reasonable use of bentonite can not only improve the performance of building materials but also reduce the cost of materials and effectively save resources.

Overview of the properties of bentonite

Bentonite is a silicate with a lamellar structure, and its main component is montmorillonite. Montmorillonite belongs to the monoclinic system structure, which is composed of two layers of silicon-oxygen tetrahedral wafers with a layer of aluminum-oxygen octahedral wafers, and belongs to 2: 1 type layered silicate mineral.

The adhesion between the oxygen layer of the montmorillonite molecular structure is very small, water and other polar molecules easily enter the crystal layer, and the cations in the structure are easily replaced with other ions

Application of bentonite in the field of building materials

Bentonite is widely used in construction materials because of its good expansibility and water absorption.

1 material

⊙The crystal structure of bentonite allows water molecules to enter its lattice layer. At the same time, due to the negative charge of the molecular structure, the particles repel each other, and the external pressure will not easily squeeze out the adsorbed water molecules.
⊙Bentonite has a small volume and a large specific surface area. In theory, it can adsorb water equivalent to 8 to 20 times its volume. After washing, it is in a gel state, which can effectively prevent the passage of water molecules and form a good waterproof layer.

2 Wall materials

Bentonite's own characteristics can be added to the wall material to better achieve the properties of the material, improve the function of the wall material, and tap for better performance.

3 Cementing materials

①White cement

Bentonite plus other materials can be processed to produce white cement. Compared with ordinary white cement, this white cement has the characteristics of good fluidity and large whiteness.

② Mortar and concrete

Bentonite has good water absorption and water retention, and it can absorb the water in the mortar and thicken the water-retaining material when it is placed in the mortar.

Add organic matter to bentonite and then start complexing reaction to form a suitable cross-linked polymer with bentonite particles as the main network points. The network structure of organic matter effectively limits the infinite expansion of bentonite, and also limits the shrinkage of cement slurry, which makes the mortar and concrete structure more compact and tough, and effectively organizes the exudation of water and the invasion of harmful media.

4 coating

①As inorganic thickener

Due to the negative charge of montmorillonite, when bentonite is dispersed in the paint, it will attract the polar groups in the paint to form a bentonite-organic composite. When organic molecules enter the interlayer structure of montmorillonite, the bentonite will expand, which can make the paint The consistency increases.

② Do auxiliary adhesive

Bentonite has good cohesiveness and hiding power, and it can play a role in enhancing the cohesiveness of the coating when it is put into the coating, and can replace part of the base material, reduce the cost and recycle.

③Do suspension dust agent

Bentonite has good suspendability and dispersibility in water. Adding an appropriate amount of bentonite to the coating can make the coating difficult to precipitate, stratify and make the raw materials more uniform and more stable.

④Give paint a certain function

Bentonite-organic composite has strong hydrophilicity and dispersibility, so it has emulsification, and its formation process is irreversible. It becomes hydrophobic after dehydration. This feature can be used to improve the waterproofness of the coating.

Acid modification of sodium-based bentonite will increase the specific surface area of ​​the acidified bentonite, increase the interlayer distance, and improve the dispersion stability. Adding acidified bentonite to the coating can significantly reduce the viscosity of the coating and prepare a coating with higher solid content.

bentonite Raymond mill
Bentonite Raymond Mill, a new environmentally friendly large pendulum mill
* Grinding ring diameter *: 1900-3000mm
* Number of grinding rollers *: 5-6
* Complete power *: 555-1732KW
* Production capacity *: 3-90t / h
* Finished particles *: 0.038-0.18mm
* Application area *: This mill is a technical innovation of the pendulum mill, expanding the application field of the pendulum mill. It is widely used in the production and living fields of paper making, coating, plastic, rubber, ink, pigment, building materials, medicine, food, etc.
* Practical materials *: It has high production and efficient grinding capacity for various non-metallic mineral materials with Mohs hardness below 7 and humidity within 6%, such as coal-based kaolin, talc, dolomite, titanium dioxide, quartz stone, Bauxite, marble, feldspar, barite, ilmenite and other non-mineral grinding effects are good.

Bentonite is widely used in building materials as a thickener, binder, etc. due to its swelling and water absorption. Reasonable use of bentonite can not only improve the performance of building materials but also reduce the cost of materials and effectively save resources. China has large reserves of bentonite resources. At this stage, building materials are developing in a green direction. Increasing the modification and technical research of bentonite is still a focus of our work.
The non-metallic bentonite Raymond mill produced by Shanghai Clirik Machinery Co., Ltd. has stable performance, excellent quality, high yield, high efficiency, energy saving and environmental protection. It has a number of patented technologies. In infrastructure construction, deep processing of minerals, solid waste recycling, energy saving and reduction Emissions, environmental protection, metallurgy, chemical industry, electric power and other fields are widely used and very popular. For details, please consult WhatsApp + 86-13917147829

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