How to identify old soil, how to identify 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.

The chemical composition of kaolin contains a large amount of Al2O3, SiO2 and a small amount of Fe2O3, TiO2 and trace amounts of K2O, Na2O, CAO and MGO. Kaolin is the basis of ceramic embryo body molding, with good plasticity and bonding, can effectively reduce the deformation and cracking of the embryo body, has high fire resistance and whiteness, can enhance mechanical strength, can improve thermal and chemical stability and sintering performance, in ceramic glaze and other processes have a good suspension and adsorption effect. The product also has the advantages of high aluminum oxide content, low harmful impurities such as iron, manganese and titanium, stable quality of raw ore and concentrate of ore deposits, etc., and is a high-quality kaolin.

Generally speaking, good kaolin has a whiteness of more than 70 and an aluminum content of more than 30.

Washed kaolin**.

The cheaper ones are a few hundred yuan a ton, and the more expensive ones are about 1,000 yuan a ton.

Kaolin testingKaolin can be detected by inductive q-combined plasma optical emission spectrometry. The so-called "inductance q-combined plasma emission spectrometry", also known as "full-spectrum direct reading spectroscopy", has the advantages of wide linear range, simultaneous measurement of multiple elements, and low interference with the matrix, so it is widely used in high-territory detection. In addition, inductively coupled plasma mass spectrometry is available.

At present, the word method is the most effective, accurate and rapid method for measuring kaolin, but the accuracy of the analysis is reduced due to the interference of heterogeneous peaks such as argon and oxides of low-mass elements.

You can send it to the local testing center for testing, and you can only judge if you have data, please provide which city you are in, and I will give the local testing center information for your consideration.

Go to the Bureau of Land and Resources to identify the ingredients

**Kaolin?

First of all, the chemical composition and physical properties are tested, and the development direction and final product are judged based on the results.

According to the product direction, understand the market demand and the best situation.

Understand the transportation situation between the origin and the market, and calculate the transportation cost.

The approximate ex-factory price range is reversed.

If the ex-factory price profit is objective, you can do a reserve analysis to see if it has reached an economic scale worthy of development.

The value of kaolin mainly depends on its application field and consumption, and there is no too strict grade.

Calcined aged soil is not clay.

Clay: is a hydrous aluminosilicate mineral, a widely distributed colloidal matte cohesive soil, which is malleable when wet and hard after roasting, and its main composition is decomposed igneous rock and Qingna metamorphic rock, and its basic composition is kaolin and other hydrogen-containing bauxite minerals. Clay minerals are tiny crystals, and scientists have found that there is an interesting defective structure in clay mineral crystals that may hold a considerable amount of information that determines the orientation and configuration of crystal growth.

Clay has unique plasticity and bondability, that is, molding performance and firing performance.

Kaolin. Kaolin is mainly composed of less than 2 microns of microflakes, tubular, laminated kaolinite and other kaolinite cluster minerals (kaolinite, dikailite, perlite, halloysite, etc.), the ideal chemical formula is Al2O3-2SiO2-2H2O, its main mineral components are kaolinite and hydrous kaolinite, in addition to kaolinite cluster minerals, there are other minerals such as montmorillonite, illite paracham, pyrophyllite, quartz and feldspar. The chemical composition of Yunhao kaolin contains a large amount of Al2O3, SiO2 and a small amount of Fe2O3 and TiO2, as well as trace amounts of K2O, Na2O, Cao and MGO.

Unless it is true, kaolin and kaolinite actually refer to the same thing. The kaolinite after weathering is kaolin. In appearance, kaolin is scattered, and kaolinite is lumpy or scattered, and it is hard.