How to identify kaolin? What is Kaolin?

Pure kaolin.

It has the properties of high whiteness, soft quality, easy to disperse and suspend in water, good plasticity and high adhesion, and excellent electrical insulation; 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. Kaolin was first discovered in our country. It is a kind of porcelain clay used to make porcelain, and it is also called white clay, which is generally referred to as kaolin.

The chemical formula of kaolin is Al2O3 (Alumina.

2SiO2 (silicon oxide), 2H2O (water). That is to say: kaolin is aqueous aluminum silicate. Secondly, kaolin does not dissolve in water, except for hydrofluoric acid.

In addition, other acids cannot dissolve it, which is one of its characteristics. To identify kaolin, mineral analysis can also be used. In recent years, the rapid development of modern science and technology has made the application of kaolin more extensive, and some high-tech fields have begun to use kaolin as a new material, and even atomic reactors.

High-temperature porcelain parts for space shuttles and spacecraft are also made of kaolin. Kaolin.

The identification method of kaolin is as follows:

1.Observation: The color of kaolin is white, and other impurities will interfere with its whiteness.

2.Wet process: Kaolin does not dissolve in water, while other impurities may dissolve.

3.Cauterization method: Kaolin will turn yellow when burned at high temperatures, while other impurities may turn black.

4.Mineralogical analysis: Distinguish the authenticity of kaolin by analyzing the mineral composition.

5.Infrared spectroscopy: Infrared spectroscopy analysis is used to determine the chemical composition and structure of kaolin.

6.X-ray diffraction: X-ray diffraction analysis is used to determine the crystal structure of kaolin.

7.Adsorption method: The purity and quality of kaolin are judged by measuring its adsorption properties.

8.Thermogravimetric analysis: The purity and quality of kaolin are determined by determining its thermal stability.

9.Conductivity method: The purity and quality of kaolin are determined by determining its conductivity.

10.Scanning electron microscopy: Determine the purity and quality of kaolin by observing its surface topography and crystal structure.

It should be noted that not all of the above methods are applicable to all situations, and the selection of specific methods needs to be selected and adjusted according to the specific situation. At the same time, the identification of kaolin needs to consider a variety of factors, including color, whiteness, hardness, oil absorption, density, iron content, zinc content and so on.

Guanyin soil is what we now call kaolin. Kaolin is a kind of clay and clay rock dominated by kaolinite clay minerals, a genus of non-metallic minerals, named after Gaoling Village, Jingdezhen, Jiangxi Province.

The mineral composition of kaolin is mainly composed of kaolinite, halloysite, mica, illite, montmorillonite, quartz, feldspar and other minerals. Kaolin is widely used, mainly used in papermaking, ceramics and refractory materials, followed by coatings, rubber fillers, enamel glazes and white cement raw materials, and a small amount of plastics, paints, pigments, grinding wheels, pencils, daily cosmetics, soaps, pesticides, medicine, textiles, petroleum, chemicals, building materials, national defense and other industrial sectors.

The minerals contained in kaolin in nature are mainly divided into clay minerals and non-clay minerals. Among them, clay minerals mainly include kaolinite group minerals and a small amount of montmorillonite, mica and chlorite; Non-clay minerals mainly include feldspar, quartz and hydrate, as well as some iron minerals such as hematite, siderite, limonite, titanium minerals such as rutile and organic matter such as plant fibers. It is mainly clay minerals that determine the properties of kaolin.

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.

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.

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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.

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, crucibles for glass banquet fibers and laboratory crucibles, and kaolin with low purity 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 into a molecular sieve for chemical industry, 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 planes, etc.

There is no difference. Kaolinite is also known as "kaolin" and "porcelain clay". A clay mineral. It was named because it was first discovered in Gaoling Village, near Jingdezhen, Jiangxi Province. It is formed by aluminosilicate minerals such as feldspar and common pyroxene during weathering.

It is like beam soil or block, with low hardness, plasticity, adhesion and volume expansion when wet, especially microcrystalline kaolinite (also known as "montmorillonite", "Jiaoling stone") has greater expansion (up to several times to more than ten times). The main components of microcrystalline kaolinite and bailerite are called "spotted morillonite".

Kaolinite is a dense or loose block, generally white Sunyun, if it contains impurities, it is beige. Kaolinite is pure white, and can be dyed into other colors because of impurities. The aggregate is dull or waxy.

Oxides of silicon, aluminum, iron, titanium, potassium, sodium andLoss on ignition

Kaolin. Mineral-like species are made of kaolinite.

Kaolinite cluster minerals such as daffite, perlite, and halloysite are composed of mineral components, and the main mineral component is kaolinite. It belongs to the 1:1 type layered silicate, and the crystal is mainly composed of silicon-oxygen tetrahedron and aluminum-hydroxide-octahedron, in which the silicon-oxygen tetrahedron is connected along the two-dimensional direction in the way that the sparrow shares the apex angle to form a hexagonal arrangement of grid layers.

Features:

During the firing process of dried kaolin adobe, a series of physicochemical changes occur (dehydration, decomposition, formation of mullite.

Fusible impurities melt to form glass phase filled in the void between the particles, etc.), and the performance of product shrinkage is also divided into two types: linear shrinkage and bulk shrinkage.

Like drying shrinkage, the firing shrinkage is too large, which is easy to lead to cracking of the sedan body. In addition, if a large amount of quartz is mixed in the blank during roasting, it will undergo a crystal transformation (trigonal hexagonal), which will expand its volume and also produce reverse shrinkage.

Kaolin is a non-metallic mineral, which is a clay and clay rock dominated by kaolinite clay minerals. Because it is white and delicate, it is also called dolomites. It is named after Gaoling Village, Jingdezhen, Jiangxi Province.

Its pure kaolin is white and delicate, soft soil, and has good physical and chemical properties such as plasticity and fire resistance. Its mineral composition is mainly composed of kaolinite, halloysite, mica, illite, montmorillonite, quartz, feldspar and other minerals. Kaolin is widely used, mainly used in papermaking, ceramics and refractory materials, followed by coatings, rubber fillers, enamel glazes and white cement raw materials, and a small amount of plastics, paints, pigments, grinding wheels, pencils, daily cosmetics, soaps, pesticides, medicine, textiles, petroleum, chemicals, building materials, national defense and other industrial sectors.

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 molecular sieve for the synthesis of chemical industry with high-efficiency adsorbent, 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.

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What is Kaolin? The so-called kaolin is a non-metallic mineral, mainly kaolinite clay minerals, and its name comes from Gaoling Village, Jingdezhen, Jiangxi Province. Pure kaolin is white, delicate and soft soil, with good plasticity and fire resistance.

Kaolin is mainly composed of kaolinite, halloysite, mica, illite, montmorillonite, quartz, feldspar and other minerals, which can be divided into clay minerals and non-clay minerals, which are extremely versatile.

Kaolin uses

1.It has become an essential mineral raw material for papermaking, ceramics, rubber, chemicals, coatings, pharmaceuticals and national defense industries.

3.The finer the kaolin particles, the better, so that the porcelain clay has better plasticity and drying strength.

4.Process levels that require fast casting, faster grouting and dewatering require higher particle size of the ingredients.

One of the raw materials of ceramics is a clay composed mainly of kaolinite. It is named after Gaoling Village, which was first discovered in the northeast of Jingdezhen, Jiangxi Province, and is mainly composed of alumina and silicon oxide. Pure kaolin is dense or loose block, white and light gray in appearance, and more black, brown, pink, beige and other colors after being polluted by other substances.

Kaolin has a slippery feeling, easy to form powder by hand, white color after calcination, high refractoriness, is an excellent porcelain raw material.