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Speaking of kaolin, friends who have not paid attention to this aspect may be a little confused. , but products using it as raw materials are actually very common in life. Kaolin is a non-metallic mineral. It is also called dolomite because of its white and fine texture. It is famous for being rich in porcelain. For example, the porcelain in Jingdezhen is made of kaolin.
But the kaolin clay in the customs is not just this kind of dolomitic clay, it is a large classification.
For example, 25.05 Various natural sands
Sand containing kaolin is naturally produced by the weathering of kaolinite. The kaolinite mineral usually needs to be crushed and washed with water. , precipitation, magnetic separation and other purification processes to meet the requirements of subsequent application fields, so it is rare to see natural sand with kaolinite as the main component.
25.07 Kaolin and similar earths, whether or not calcined
This heading includes kaolin and other clays, the principal components of which are kaolin minerals, e.g. Stone, Dikaiite and pearl clay, silica-rich kaolinite and halloysite. These calcined clays are also included in this heading.
Kaolin, also known as clay, is a high-grade white or nearly white clay used in the ceramics and paper industries. Sands containing kaolin are not included (heading 25.05).
2507.0010 Kaolin clay, whether or not calcined
Kaolin clay of subheading 2507.0010, a A kind of clay with kaolinite as the main component, often containing components such as halloysite, montmorillonite, and quartz. In addition to being mainly used in the ceramic industry, kaolin is also the largest user of kaolin in the paper industry. It is also used in rubber, plastics, chemicals, refractory materials and other industries.
This domestic subheading does not include goods that are specifically listed in other tariff lines after calcination.
2507.0090 Other kaolin-like clays, whether or not calcined
There are also minerals that appear to have nothing to do with kaolin, but are actually kaolin.
Gangue
Gangue is another name for coal series kaolin, which is associated with coal
ball clay )
Ball clay refers to clay minerals with microcrystalline kaolinite and α-quartz particles as the main mineral components. Or called ball soil,A refractory raw material used in the ceramic field. The above coal gangue and ball clay should be classified into 25070010.
Porcelain clay and pottery clay
Porcelain clay and pottery clay are both named after their uses, namely the soil used to produce porcelain and the soil used to produce pottery. Depending on the actual situation, porcelain clay and pottery clay may be classified into 25070010, 25070090, 25291000, and 25309099 based on the actual mineral composition.
