Kaolinite (English: Kaolinite), also known as Guanyin clay, white eel mud, bentonite, licorice, clay, and white clay, is a silicate mineral containing aluminum, which is white soft mud, The particles are fine and floury.
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Product description:
Kaolinite (English: Kaolinite), also known as Guanyin clay, white eel mud, bentonite, licorice, clay, and white clay, is a silicate mineral containing aluminum, which is white soft mud, The particles are fine and floury. Its chemical composition is quite stable and is known as the "universal stone". It is the main raw material for making porcelain and pottery.
Kaolin is a clay mineral with kaolinite as the main component. It is rich in minerals such as silicon, zinc, magnesium, and aluminum. Its chemical molecular formula is: Al₂(Si₂O5)(OH)₄. In addition to Al₂O₃, it also contains SiO₂.
Processing technology:
1.1 Scatter
In the kaolin wet separation process, the raw ore is first made into a slurry, so that the mineral is dissociated in the water in the form of a granular monomer, and the particle size is in micrometers or even smaller. In order to separate the kaolinite group minerals from the impurity minerals (such as quartz, feldspar, mica, pyrite, ilmenite, etc.), the clay particles must be divided into fine, medium, and coarse grain levels. In order to make the dispersion effect better, it is sometimes necessary to add an appropriate dispersant. Only when the mineral particles in the slurry are fully dispersed, can they be effectively classified and sorted.
1.2 Desanding
Desanding mainly removes coarse-grained impurities such as quartz, feldspar, mica and other detrital minerals and rock cuttings, and can also remove part of iron-titanium minerals. Commonly used rake float classifier, spiral classifier, hydrocyclone and vibrating screen.
1.3 Classification
Classification is to use the difference in the size or density of the mineral particles to separate the minerals. If the size of the minerals that make up the slurry is very different, it is generally classified with a screen; if it is similar, it is classified according to the difference in density. Commonly used grading equipment includes water turbulence, hydraulic rotator, centrifuge, etc.
1.4 Magnetic separation iron removal
Almost all kaolin ore contains a small amount of iron minerals, mainly iron oxides, ilmenite, siderite, pyrite, mica, tourmaline, etc. These colored impurities usually have weak magnetic properties, so that these harmful impurities can be removed by magnetic separation. Magnetic separation is a method of separating mineral particles in a magnetic field using the magnetic difference of minerals. It is more effective for removing high magnetic minerals such as magnetite and ilmenite, or iron filings mixed in during processing.
1.5 Flotation
The application of flotation to purify kaolin is very extensive, and the current technology and equipment are constantly being improved and updated, making the kaolin concentrate obtain higher whiteness and meet the needs of industry.
1.6 Bleaching
The whiteness and brightness of kaolin used as pigments, fillers and coatings directly affect its value. The so-called bleaching is to use different methods to increase the whiteness of kaolin. Specific methods: magnetic bleaching, flotation bleaching, chemical bleaching, etc.
1.7 Superfine grinding
In order to meet the higher fineness requirements of kaolin in paper, plastic and rubber products industries, it is necessary to increase the kaolin method.
1.8 calcination processing
Calcining is a special processing method to improve the properties of kaolin. The use of calcined kaolin in the paper coating industry can increase the scattering power and coverage rate, and increase the ink adsorption speed. Used in cable filler to increase resistivity, in the synthesis of 4A zeolite, aluminum chloride, cryolite industry, calcination can produce mullite. The calcination of coal series kaolin is an indispensable process, because calcination can remove carbon and improve whiteness.
1.9 Surface modification
Kaolin is used as a filler for plastics, rubber, paint, and cables. In order to make it easy to uniformly disperse and bond with various organic polymer materials, it is necessary to coat a layer of organic coupling agent on the surface of kaolin. This process is called For surface modification. Kaolin with good modification effect is hydrophobic, it floats on the surface of water without sinking.
Application:
The development and utilization of kaolin laid a solid foundation for the rapid development of Jingdezhen's porcelain industry and played a significant role in the development of ceramic craftsmanship in the world. With the initial single-material porcelain (using porcelain stone to make porcelain) to the later binary formula (using porcelain stone and kaolin to make porcelain), the porcelain making process has become increasingly excellent. The use of kaolin as the raw material for porcelain has greatly promoted the improvement of ceramic craftsmanship and product quality, and promoted the development of ceramics.
Packing bag: Jumbo bag(or according to the customer requirement)
Payment: T/T; D/P; L/C (According to the consultation with the customer)
HS. Code: 2507001000
