Time:2021-05-21
Pure kaolin has high whiteness, soft quality, easy to disperse and suspend in water, good plasticity, high cohesiveness, and excellent electrical insulation properties; it has good acid solubility, low cation exchange capacity, and good The fire resistance and other physical and chemical properties, the effect is very good when used in coating materials.
The flat nature of kaolin can provide a good balance between the fluidity and leveling of the coating, can effectively prevent the penetration of water, and improve the scrubbing resistance and pollution resistance of the coating film. For the sticky coating film, it is flat The particles can improve the pressure resistance of the coating.
It can be said that this is the benefit of reading more books. It is necessary to know that kaolin has a wide range of uses in ceramics, rubber, plastics, artificial leather, self-cement, refractories, chemistry and other fields. In addition to its role in the field of coatings, kaolin is becoming more and more useful. Wider, its value will be higher and higher.
It stands to reason that the development of the kaolin processing industry will be very fast. As long as there are kaolin resources, the Raymond mill is used for grinding, and the fineness of the finished product is determined according to the needs. It can be done by adjusting the analysis machine of the Raymond mill. By the way, Zhengzhou General Mining Machinery Co., Ltd. provides large, medium and small Raymond mills, but there are not many users who buy Raymond mills to process kaolin. Why?
Kaolin is not like limestone. It is available all over the country. Even in areas with advantageous resources such as Guangdong, Guangxi, Anhui, and Hebei, there are not many kaolin mining and deep processing businesses, not to mention other areas with few kaolin resources.
Anyone who understands the role of kaolin knows that whiteness and brightness are very important, because high-purity kaolin is white. For ceramics, coatings and other fields, there are certain standards for the whiteness of kaolin, and it is produced in nature. Kaolin often contains some iron minerals. After being processed by Raymond mill, the fine kaolin powder contains iron. Iron is a ferrous metal. When the iron content exceeds a certain level, it will affect the whiteness of the kaolin powder. If the iron content cannot be controlled, the value of the kaolin produced by processing and grinding is not high. Because of this, many people know that the value of this resource is tempting, but they still dare not mine it.
So is there no alternative? There is a way, that is to use some technological means to remove the iron in the kaolin. Oxidative iron removal method can be used, that is, oxygen removal iron method is used for bleaching. It is also possible to use reduction iron removal method, which is to use sodium hydrosulfite, the scientific name is sodium dithionite, to reduce ferric iron to divalent iron, dissolve it in water, filter and wash it.
Of course, through years of experimentation and practice, kaolin is actually very mature for removing iron. These can be combined with some scientific research units. With the development of science and technology, the higher the requirement for whiteness of kaolin, the more common methods for removing iron and bleaching. With the aid of iron removal methods and processes, to mine deep-processed kaolin, you can get higher profits