Kaolin is a mineral whose constituent units are kaolinites, which is a hydrous aluminum silicate. Kaolin was first discovered by the Chinese, and kaolin in Chinese means ridge, which is actually taken from a hill in the southeast of China. To buy kaolin with good quality and reasonable price, contact Nejad Holding

The particles of this substance are so small that it increases the quality of its suspension and increases its ability to combine with other substances. Kaolin is white in color and also has the ability to shine and reflect light, which is the reason for its high level of brightness.

Types of kaolin

Below we describe the types of kaolin grades:

ball clay

This type of kaolin is a kind of clay stone, in addition to kaolin, there is also a small amount of quartz and chlorite.halloysite

This type of kaolin has a high amount of impurities. Halloysite clay is used to make fine china and ceramics. This type of kaolin also has different types in terms of complete porosity.

Dickiet

The large crystal of kaolin, whose diameter is more than 10 microns and is better crystallized than kaolinite, this type of kaolin consists of metal colonies.

Nacrit set

This type of kaolin is like Dickite, with the difference that its textures are more irregular.

Physical and chemical properties of kaolin

This material has a white color and a soft quality structure that dissolves easily in water, has good plasticity and high viscosity. This material is a good electrical insulator, it is resistant to acid and base changes, and it is not flammable. It has a melting temperature of 1750 degrees Celsius.Stickiness is another physical property of this mineral, the higher the stickiness of this material, the higher its purity.

Physical and chemical properties of kaolin

Kaolin extraction method

To extract kaolin from the mine, they first extract ore, then they crush the ore using a stone crusher and homogenize it. In the next step, they crush these stones with a mill, and then they do the process of concentrating it. To purify this material, they process it with different methods, after which kaolin will have special characteristics in each method. is

Further processing or washing with water causes the impurities in the sticky liquid to be separated, and the product resulting from this process is used as a filler and coating.In other cases, it is possible to increase the purification of kaolin by using a centrifuge, hydrosilicone, or by using water continuously. In the best case, the best kaolins in the world have impurities.

Kaolin extraction method

What kaolin is suitable?

The percentage of aluminum oxide should be more than 30%. The amount of iron oxides should not be more than 1%. The amount of titanium oxide should be less than 2%. Its alkaline oxides should not be more than 2%. The maximum amount of calcium oxide is 2% and magnesium oxide is 3%. Its tempering should be around 1700 degrees Celsius. Also, its rupture model should be more than 10 kg / cm2. The higher the amount of kaolinite compared to other minerals, the higher the quality of kaolin.Applications of kaolin

The use of kaolin was first for the paper production industry. This material as a coating for paper causes gloss and increases printability. This composition is used as a raw material for making many porcelain dishes, which is due to its hardness and luster. Cosmetic industry is also one of the industries that consume kaolin. This material can be used alone in combination with water to create masks, scrubs and cleansers.Can be used in paint and rubber 

As insulation for cables and wires

Used in medicine to relieve pain and swelling inside the mouth caused by radiation therapy, cholera treatment, wound treatment and inflammation in the large intestine.

As a catalyst in oil and water industries

In building materials for preparing flooring

Glass manufacturing industry

conclusion

Kaolin has unique features and characteristics that have made it used as a valuable material in various industries, which seems to be the most used material in the paper production industry. To buy kaolin, we at Behnejad Holding are ready to cooperate in foreign currency (proforma) and rial-cash and conditions with respectable factories and dear businesses, so contact us and provide the kaolin you need in time from after-sales services. And take advantage of the support of the holding