What does kaolin do? The role of kaolin

1. Industrial use.

Kaolin. It has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, pharmaceuticals and national defense;

Ceramics not only have strict requirements for the plasticity, bonding, drying shrinkage, drying strength, sintering shrinkage, sintering properties, refractory and whiteness after firing, etc., but also involve chemical properties, especially the presence of chromogenic elements such as iron, titanium, copper, chromium, manganese, etc., which reduce the whiteness after firing and produce spots.

2. Eat. In the old society and three difficult years.

When the poor are in a state of scarcity or during the famine, they often survive by eating Guanyin soil; This kind of soil can satisfy hunger, but it cannot be digested and absorbed by the human body, and the stomach is bloated after eating.

It is difficult to defecate, and eating a small amount is not fatal; Despite not starving, people still have to die due to lack of nutrition.

Kaolin main role:

Industrial use. The role of kaolin in ceramics is to introduce Al2O3, which is conducive to the generation of mullite, improve its chemical stability and sintering strength, and decompose kaolin to generate mullite in firing, forming the main framework of the strength of the body, which can prevent the deformation of the product, make the firing temperature wider, and also make the body have a certain whiteness.

Kaolin has a certain plasticity, cohesiveness, suspension and binding ability, which gives porcelain clay and porcelain glaze good formability, so that the ceramic clay is conducive to car blank and grouting and easy to form.

The difference in the crystallization degree of kaolinite in kaolin will also significantly affect the process performance of the porcelain billet, and if the crystallization degree is good, the plasticity and binding capacity will be low, the drying shrinkage will be small, the sintering temperature will be high, and the impurity content will also be reduced.

Ceramics not only have strict requirements for the plasticity, bonding, drying shrinkage, sintering properties, refractory and whiteness after firing, etc., but also involve chemical properties, the presence of chromogenic elements such as iron, titanium, copper, chromium, manganese, etc., so that the whiteness is reduced after firing, so that spots are produced.

Kaolin has become an essential mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, pharmaceuticals and national defense.

The ceramic industry is the earliest and larger industry for the application of kaolin. The general dosage is 20% to 30% of the formula. The role of kaolin in ceramics is to introduce Al2O3, which is conducive to the generation of mullite, improve its chemical stability and sintering strength, and decompose kaolin to generate mullite in firing, forming the main framework of the strength of the body, which can prevent the deformation of the product, make the firing temperature wider, and also make the body have a certain whiteness.

At the same time, kaolin has a certain plasticity, cohesiveness, suspension and binding ability, which gives porcelain clay and porcelain enamel good formability, so that the ceramic clay is conducive to turning and grouting and easy to form. If used in wires, it can increase insulation and reduce dielectric loss.

Ceramics not only have strict requirements for the plasticity, bonding, drying shrinkage, drying strength, sintering shrinkage, sintering properties, refractory and whiteness after firing, etc., but also involve chemical properties, especially the presence of chromogenic elements such as iron, titanium, copper, chromium, manganese, etc., which reduce the whiteness after firing and produce spots.

The particle size requirements for kaolin are generally as fine as possible, so that the porcelain clay has good plasticity and drying strength, but for the casting process that requires fast casting, accelerated grouting speed and dehydration speed, the particle size of the ingredients needs to be improved. In addition, the difference in the crystallization degree of kaolinite in kaolin will also significantly affect the process performance of the porcelain billet, the crystallization degree is good, the plasticity, binding ability is low, the drying shrinkage is small, the sintering temperature is high, and the impurity content is also reduced; On the contrary, its plasticity is high, the drying shrinkage is large, the sintering temperature is low, and the corresponding impurity content is also high.

Kaolin is a non-metallic mineral, which is a clay and clay rock dominated by kaolinite clay minerals. It is named after Gaoling Village, Jingdezhen, Jiangxi Province. Pure kaolin is white and delicate, soft soil, with good plasticity and fire resistance and other physical and chemical properties.

Its mineral composition is mainly composed of kaolinite, halloysite, mica, illite, montmorillonite, quartz, feldspar and other minerals.

1. Application of kaolin in petrochemical industry: used as a catalyst in petroleum processing. Due to the catalyst prepared by kaolin, it has a high matrix activity.

1. Strong resistance to heavy metal pollution, good catalytic activity and selectivity.

2. Kaolin is widely used in the paper industry. There are two main areas, one is the filler used in the papermaking process and the other is the pigment used in the surface coating process.

3. The application of kaolin in emerging industries. Kaolin has the properties of high whiteness and brightness, softness, strong water absorption and easy decomposition and suspension in water, good plasticity and high adhesion, excellent electrical insulation, good acid solubility, strong ion adsorption and ion exchange, as well as good sinterability and high refractoriness.

4. The application of kaolin in the ceramic industry: kaolin for the ceramic industry is a series of products produced with high-quality raw materials and advanced process equipment, with high purity, stable chemical properties, and excellent unique physical properties advantages of similar varieties in China.

5. Application of kaolin in agricultural production: calcined kaolin has a blocking effect on infrared rays with a wavelength of 7-25 m, and when modified calcined kaolin is added, the night temperature in the agricultural film can be increased by 2-3. It reduces the temperature difference between day and night, which is conducive to the growth of crops.

It is widely used in latex paint, powder coating, paint, cathode, anodic electrophoresis, coated white cardboard, white cardboard, light coated paper, copper coated paper, thermal paper, carbonless copy paper, cast coated paper, coated box board and other coated processed paper coatings. and for the cable rubber and plastic industries.

Kaolin has the properties of high whiteness and brightness, softness, strong water absorption and easy decomposition and suspension in water, good plasticity and high adhesion, excellent electrical insulation, good acid solubility, strong ion adsorption and ion exchange, as well as good sinterability and high refractoriness.

Kaolin's plasticity, cohesiveness, certain drying strength, sintering and whiteness after firing and other special properties make it the main raw material for ceramic production; White, soft, highly dispersed, adsorption and chemical properties and other excellent process properties, so that it has been widely used in the paper industry. In addition, kaolin is widely used in industrial sectors such as rubber, plastics, refractories, petroleum refining, as well as in agriculture and defense cutting-edge technologies.

It is mainly used in the ceramic industry, coatings, refractory materials, papermaking, paints, rubber, high-grade porcelain, wires and cables, industrial plastics, chemical industry fillers, inks, food, cosmetics, medicines, etc., and replaces expensive materials such as lithopone powder and some titanium dioxide in paints and coatings.

The word kaolin** is named after a white clay produced in Gaoling Village, Jingdezhen, Jiangxi Province, China, which can be used to make porcelain. Kaolin ore is a clay or claystone in which the clay minerals of the kaolinite subgroup reach a usable content. The mineral composition of kaolin is composed of clay minerals and non-clay minerals, the former mainly including kaolinite, dickaiite, pearl terracotta, metakaolinite (and halloysite), hydromica and montmorillonite; The latter are mainly detrital minerals such as quartz, feldspar, mica, a small amount of heavy minerals and some autogenous and secondary minerals, such as magnetite, rutile, lignite, alum stone, gibbsite monohydrate and diasporite monohydrate.

Because of its many excellent technological properties, kaolin is widely used in papermaking, ceramics, rubber, plastics, refractories, chemicals, pesticides, medicine, textiles, petroleum, building materials and national defense departments, and is also widely used in cutting-edge technologies for national defense, such as electrical, atomic energy, jet aircraft, rockets, artificial satellites, semiconductors, microwave technology, integrated circuits, radio, television and radar.

Kaolin has different application fields and has very different quality requirements. According to the industrial use, it can be divided into kaolin for the paper industry, kaolin for the enamel industry, kaolin for the rubber industry and kaolin for the ceramic industry. In terms of chemical composition, the Al2O3 and SiO2 of kaolin are required to be close to the theoretical value of kaolin, and the Al2O3 content requirements of kaolin can be appropriately lowered for daily ceramics, building sanitary ceramics, white cement raw materials, rubber and plastic fillers, and the SiO2 content can be higher as appropriate.

There are also different allowable levels for harmful components such as Fe2O3, TiO2, and SO3. The allowable values for the contents of CaO, MGO, K2O, and Na2O are different for different applications. In terms of process performance, the focus of the requirements of each application field is more obvious.

For example, papermaking coatings mainly require high whiteness, low viscosity concentration and fine particle size; The ceramic industry requires good plasticity, molding performance and firing whiteness; Refractory materials require high refractoriness; The enamel industry requires good suspension, etc.

Glycerin is a substance with a sweetening component that was occasionally discovered by the Swedish pharmacist Scheele in 1779 when olive oil reacted with aluminum monoxide.

Pure kaolin has high whiteness, soft quality, easy to disperse and suspend in water, good plasticity and high adhesion, and excellent electrical insulation properties; It has good acid solubility, very low cation exchange capacity, good fire resistance and other physical and chemical properties. Therefore, kaolin has become an essential mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, pharmaceuticals and national defense. Kaolin is widely used in the paper industry.

There are two main areas, one is the filler used in the papermaking (or papermaking) process, and the other is the pigment used in the surface coating process.

The chemical structure formula is Al2O3·2SiO2·2H2O, that is, alumina and silica are the main components, often containing metal oxide impurities.

Summary. Hello, happy to answer your questions

It is still very versatile, for example, it is needed in papermaking, and kaolin is also needed in the manufacture of ceramics. The coatings commonly used in life also have the full use of kaolin, of course, white cement also contains kaolin, mainly because of its high viscosity and better decoration effect. This rare clay plays a very big role in the medical, aviation, manufacturing and other industries, because this kind of thing is relatively rare, and many countries want to import it from China, but China is self-sufficient.

It is difficult for ordinary people to come into contact with this kind of thing, but its derivatives are still used a lot.

Hope it helps.

The role of kaolin

Hello, I am Mr. but, I am happy to answer for you, your question is already familiar to me, it takes a little time to type, please wait patiently for a while, and reply to you within 5 minutes

Hello, happy to answer your questions It is still very versatile, for example, it is needed in papermaking, and kaolin is also needed in the manufacture of ceramics. The coatings commonly used in life also have the full use of kaolin, of course, white cement also contains kaolin, mainly because of its high viscosity and better decoration effect. This rare clay plays a very big role in the medical, aviation, manufacturing and other industries, because this kind of thing is relatively rare, and many countries want to import it from China, but China is self-sufficient.

It is difficult for ordinary people to come into contact with this kind of thing, but its derivatives are still used a lot. Hope it helps.

The uses of kaolin are:It has become a necessary mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, medicine and national defense, and kaolin has a certain plasticity, which makes the ceramic mud billet conducive to car billet and grouting, and is easy to form.

The role of kaolin in ceramics is to introduce Al2O3, which is conducive to the formation of mullite and improves its chemical stability and sintering strength.

In the firing, kaolin decomposes to generate mullite, forming the main framework of the strength of the body, which can prevent the deformation of the product, make the firing temperature wider, and make the body have a certain whiteness.

1. Used in the ceramic industry. Kaolin is mainly used as a raw material for ceramics and is used to make various types of ceramics.

2. Used in refractory materials and cement industry. Mainly due to the good refractory properties of kaolin, high-grade kaolin can be used to make optical glass, glass fiber crucibles and laboratory crucibles, and low-purity kaolin can be used to make refractory bricks, refractory mud and other refractory materials.

3. Used in the paper industry. Kaolin is used as a filler for paper, which can greatly improve the whiteness and smoothness of the paper.

4. Used in the rubber industry. Kaolin is used as a reinforcing agent and filler for rubber, which can improve the strength and acid resistance of rubber.

5. Used in petrochemical industry. Kaolin can be made into a high-efficiency adsorbent for the synthesis of chemical molecular sieves, and can also be used as a catalyst for petroleum cracking.

6. It is used in the pharmaceutical and textile industry.

7. It is used in the field of cutting-edge technology for national defense. For example: atomic reactors, jet aircraft, etc.