Question 2: What is kaolin? Kaolin (also known as Guanyin mud, eel mud, swelling rock, bentonite, bentonite, clay and white mud) is a silicate mineral containing aluminum, and its chemical molecular formula is Al4(Si4O 10)OH6. Besides Al2O3, it also contains SiO2, which has the appearance of white mud and fine particles. Kaolin is an important nonmetallic mineral, which is also called four nonmetallic minerals with mica, timely and calcium carbonate, and is the main raw material for making ceramics.
Question 3: What material is kaolin? What is kaolin? It is mainly divided into three types: energy minerals, metal minerals and non-metal minerals. Kaolin is an important nonmetallic mineral, and it is also called four nonmetallic minerals together with mica, Yingshi and calcium carbonate. Kaolin is mainly composed of fine flaky, tubular and layered kaolinite cluster minerals (kaolinite, dickite, nacrite, halloysite, etc.). ) is less than 2 microns. The ideal chemical formula is AL2O3-2SiO2-2H2O, and the main mineral components are kaolinite and hydrated kaolinite, accompanied by montmorillonite, illite, pyrophyllite, quartz and feldspar. The chemical composition of kaolin contains a large amount of AL2O3, SiO2, a small amount of Fe2O3, TiO2 and a small amount of K2O, Na2O, CaO and MgO. China is the first country to discover and utilize kaolin in the world. As early as 3000 years ago, carved white pottery made of kaolin appeared in Shang Dynasty. Porcelain produced in Jingdezhen, Jiangxi Province is famous at home and abroad, and has always had the reputation of white jade, bright as a mirror, thin as paper and clear as a sound. Kaolin, now the international scientific name of kaolin, is produced in Gaoling Mountain near gao ling cun in the eastern suburb of Jingdezhen. According to historical records, Ante Collet, a French missionary, introduced the special features of the porcelain clay in Gaolingshan to Europe in a famous book in 17 12, which had a far-reaching influence on the porcelain manufacturing industry all over the world, so kaolin gradually got its name in Europe and became a general name for this kind of porcelain clay internationally. Characteristics and uses of kaolin Pure kaolin has high whiteness, soft quality, easy dispersion and suspension in water, good plasticity, high cohesiveness and excellent electrical insulation. It has good acid solubility, low cation exchange capacity and good fire resistance. Therefore, kaolin has become an essential mineral raw material for dozens of industries such as papermaking, ceramics, rubber, chemical industry, coatings, medicine and national defense. It is reported that kaolin is also used instead of steel in Japan to make cutting tools, turning tools and internal combustion engine casings. Especially in recent years, with the rapid development of modern science and technology, the application fields of kaolin are more extensive. Kaolin, as a new material, is widely used in some high-tech fields. Even the high-temperature resistant ceramic parts of atomic reactors, space shuttles and spaceships are made of kaolin. At present, the total output of kaolin in the world is about 40 million tons (this data belongs to the simple sum of the national output, and the trade volume of raw ore is not counted, including many repeated calculations), of which refined soil is about 23.5 million tons. Paper industry is the largest consumption department of refined kaolin, accounting for about 60% of the total consumption of kaolin. According to the data provided by Temanex Consulting Company in Canada, the total output of paper and paperboard in the world in 2000 was about 365.438+0.9 million tons, and the total consumption of kaolin for paper coating in the world was about 65.438+0.36 million tons. Kaolin is widely used in paper industry. There are mainly two fields, one is the filler for papermaking (or papermaking) and the other is the pigment for surface coating. General cultural paper, the filling amount accounts for 10-20% of the paper weight. For coated paper and paperboard (mainly including lightweight coated paper, coated paper and coated paperboard), besides fillers, pigments are also needed, and the proportion of kaolin used in fillers and pigments is 20-35% of the paper weight. Kaolin for papermaking can not only give paper good covering performance and good coating luster, but also increase the whiteness, opacity, smoothness and printability of paper, and greatly improve the quality of paper. Classification of Kaolin Natural kaolin ores can be divided into three types according to their quality, plasticity and sandy properties (grain size of feldspar and mica >: 50 microns): coal-series kaolin, soft kaolin and sandy kaolin. The different nature of resources basically determines the industrial direction that resources can be suitable for development. Generally speaking, domestic coal-series kaolin (hard kaolin) is more suitable to be developed into calcined kaolin, which is mainly used as filler for various purposes. Calcined kaolin is also used to make paper because of its high whiteness, and most of it is used to produce high-grade coated paper, which is expensive (about 4000 yuan/ton). However, because calcined soil is mainly used to increase whiteness, it is generally not used alone, and its dosage in papermaking is less than that of washed soil. Non-> >;
Question 4:baike.baidu/view/233493? What do you mean by kaolin material?
Choose the information you need, I hope it will help you.
The material is the grade and quality of steel. In practical work, it generally refers to the brand of steel. Let's look at baike.baidu/view/49272..
Question 5: What are the characteristics of kaolin in ceramic raw materials? 2 Application field and consumption structure of kaolin The consumption field of kaolin in China is very broad, involving ceramics (household ceramics, building ceramics, sanitary ceramics, arts and crafts ceramics, high-pressure ceramics, low-pressure ceramics, high-frequency ceramics, radio ceramics), paper making, rubber, plastics, enamel, petrochemical industry, coatings, printing ink, optical glass, glass fiber, chemical fiber, grinding wheel, building materials, fertilizers, pesticides and insecticides. Products include ceramics, electronics, paper making, rubber, enamel, petroleum catalysts, coatings, grinding wheels, pesticides and pesticide carriers, glue, refractories, etc., with nearly 60-70 varieties. The consumption structure of China soft kaolin is as follows: ceramics and electric porcelain account for 55%, papermaking accounts for 22%, and others account for 23%. The consumption structure of coal-series kaolin is: paint and coating 65-85%, papermaking 5- 15%, rubber and plastic and cable 5- 10%, ceramics 3-8% and fine chemicals 3-5%. The amount of calcined soil in coating industry is increasing rapidly.