What is Kaolin?
Kaolin is a clay mineral, part of the group of industrial minerals with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO4) linked through oxygen atoms to one octahedral sheet of alumina (AlO6) octahedra. Rocks that are rich in kaolinite are known as kaolin or china clay.
||WHITE(MAX WHITENESS>95%), INCANUS, LUTESCENT
||GOOD MOLDING, DRYING AND SINTERING PROPERTIES
||EASY DISPERSION AND SUSPENSION
|ELECTRICAL INSULATING PROPERTY
||200 ℃, ELECTRICAL RESISTIVITY>1010Ω*CM,
||VERY GOOD, BASAL, PRISMATIC
Kaolinite is one of the most common minerals; it is mined, as kaolin, in Malaysia, Pakistan, Vietnam, Brazil, Bulgaria, Bangladesh, France, the United Kingdom, Iran, Germany, India, Australia, South Korea, China, the Czech Republic, Spain, South Africa, and the United States.
Typically, presence of iron imparts a pink colour to the matrix. The mined and sorted kaolin is then subject to processing by a wet route to produce processed kaolin with desired properties for various applications.
Uses of Kaolin
Paper Industry: The primary use of kaolin is in the paper industry. It serves as a paper coating which improves appearance by contributing to brightness, smoothness and gloss. It also improves printability. Additionally, it is used by the paper industry as a filler reducing cost and the use of tree-based resources.
China, Porcelain and Tableware: Many people are under the mistaken impression that the only use for kaolin is in the manufacture of china. This is not true, and its use by the paper industry far exceeds its other uses. However, kaolin still serves as a valuable component in china and other tablewares. Its color, gloss and hardness are ideal characteristics for such products.
Plastics and Rubber: The bonds between the kaolin and the polymers provide enhanced mechanical strength, improved impact and flex strength, and a high degree of hydrophobicity. Kaolin also acts as a titanium dioxide extender, which means less of the expensive additive is needed to yield sharper colors.
In rubber, kaolin performs as a processing aide, giving the material dependable curing rates and increased strength with better resistance to tears and abrasions.
In plastics, Kaolin helps improve impact and tensile strength, warp resistance, electrical and chemical resistance, and enhances smoothness and brightness.
Paint and Coatings: Kaolin also offers increased opacity and tint strength, stain and scrub resistance, improved pigment suspension, sheen control and improved holdout.
Other Uses: Kaolin has a variety of other uses in products including cable insulation, specialty films and fertilizers. New uses are being discovered frequently, and ensure that the mineral will remain in demand for a long time.
13T/H Kaolin Powder Production Line in Iran
Machine: 1 Set MTM130 Grinding Mill
Output Size: 100 Mesh D80
15T/H Kaolin Powder Production Line in China
Machine: 1 Set MTW175 Grinding Mill
Output Size: 75 Micron D90
10T/H Kaolin Powder Production Line in China
Machine: 1 Set MTW138 Grinding Mill
Output Size: 100 Mesh D90
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