The purpose of kaolin processing is to remove the sulfide, oxide and hydroxide of iron and titanium oxides which can reduce the whiteness of Kaolin, as well as the detrital minerals such as feldspar and quartz from the Kaolin ore, so as to improve the purity and whiteness of kaolin products. Kaolin beneficiation process mainly adopts gravity separation to remove sand and classifying method, assisted by high gradient magnetic separation, carrier flotation, selective flocculation, stripping, chemical bleaching and other methods, iron removal process is an important link of kaolin processing.
Application
The sandy kaolin with low impurity and high whiteness can be appropriately processed by air classification. For kaolin with high impurity content, low whiteness and high iron content, a comprehensive solution with gravity separation, strong magnetic separation and chemical bleaching shall be used. For kaolin with high content of organic matter, the process of pulping, sieving and calcining can be added.
Features
1. Effectively reduce the iron content
By means of strong magnetic separation, chemical separation and other methods, the iron content can be effectively reduced, the iron compounds can be removed as early as possible and the kaolin purity can be improved by washing and classifying.
2. Effectively increase whiteness of Kaolin
The whiteness of kaolin can be greatly improved by removing the impurities in Kaolin through chemical methods, so as to reduce the equipment investment
The flotation results can be greatly improved by using compound collectors instead of traditional xanthate type collector.
3. Wide range of application
According to the properties of different kaolin, by making reasonable use of classification, chemical separation, iron removal, reducing impurities other technical processes, all kinds of kaolin can be processed properly to meet the requirements of various industries application.
4. Strong ability of deep processing
Through in-depth exploration of the technical process, high-end kaolin products can be obtained by using advanced processing technology for certain kinds of Kaolin raw. For example, high-end kaolin products with whiteness greater than 90 and particle size less than 2 microns can be produced for paper making, rubber and plastic industry.

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