Kaolin processing technique

Distribution:
Election process in wet kaolin ore made of mud first, so that the monomer form of mineral granules in the water dissociation, particle size in μm, and even smaller. In order to kaolinite-group minerals and mineral impurities (such as quartz, feldspar, mica, pyrite, limonite, etc.) separated, they must be divided into fine clay particles, in three coarse grain sizes. In order to better dispersion and sometimes need to add the appropriate dispersant, the slurry of mineral particles only achieve fully dispersed, in order to effectively carry out grading and sorting.
Desanding
Desanding is mainly remove quartz, feldspar, mica and other minerals and debris than coarse impurities, but also to remove some of the iron-titanium minerals. Floating t
Classification
Classification is a kind of method that separates the minerals use of mineral particle size or density differences. If the composition of the mineral slurry in large particle size difference, the general classification with the screen; if similar, is carried out according to the density difference between sorting. Grading equipment commonly used in water toss, hydro cyclones, centrifuges, etc.
Magnetic removal of iron
Almost all of the kaolin ore contains a small amount of iron minerals, mainly iron oxides, limonite, siderite, pyrite, mica, tourmaline and so on. These colored impurities typically have a weak magnetic, so you can use the magnetic separation method to remove these harmful impurities. Magnetic separation is the difference between the use of magnetic minerals and mineral particles in a magnetic field in a method of separation of magnetite and limonite to remove high magnetic minerals or processing of iron mixed with other more effective.

Flotation method
Flotation is widely use in Purification of kaolin, current technology and equipment are constantly improving, updating, making the kaolin concentrate higher whiteness, and to meet industry needs.

Bleach
Used as pigments, fillers and coating kaolin, its level of whiteness and brightness level of a direct impact on its value. The bleaching is mean to use different methods to increase the whiteness of kaolin. Specific methods are magnetic bleaching, flotation bleach, bleach and other chemicals.
Ultra-fine grinding
In order to meet the paper, plastics and rubber industries higher fineness of kaolin requirements, it is necessary to increase the fineness of kaolin, to improve product quality. Ultra-fine grinding process is grinding stripping, high pressure extrusion, jet mill method.
Calcinations process
Calcinations is a special processing method to improve the performance of kaolin. Claimed kaolin paper coating for industrial use can increase the scattering power and cover rate, and improve ink adsorption rate. Increase the resistivity for cable filler, in the synthesis of zeolite 4A, the production of aluminum chloride, cryolite industry, and claimed kaolin can increase the chemical activity. Calcinations can increase whiteness; can partially replace the expensive price of titanium dioxide. Claimed to produce mullite. Calcined Kaolinite for coal technology is essential, because removal of carbonaceous calcinations can improve whiteness.
Surface Modification
Kaolin used in plastics, rubber, paint, cable filling, as it easily with a variety of organic polymer materials uniformly dispersed, and a stronger integration of the surface to be coated in a layer of kaolin organic coupling agent, this process is called for the surface modification. Hydrophobic kaolin is a good modification effect, it floating in the water surface without sinking.

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Time: February/8/2012    See In: kaolin crushing plant• kaolin processing equipment for sale• kaolin processing machine

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