Introduction of kaolin

Appearance of pure kaolinite is white or light grey. Impurities in the color such as yellow, gray, blue roses. Undressed ore is dense clumps or loose soil, soft, have soapy, hardness is less than fingernails. Specific gravity: 2.4 to 2.6. Embellish absorption when dried. High refractoriness, up to 1770-1790 ℃. Have good insulation and chemical stability. Calcination whiteness is as high as 60% - 90%.

Kaolin is mainly composed of less than 2 microns tiny sheet, fold, tubular flake of minerals such as kaolinite cluster (kaolinite, dickite and nacrite, halloysite, etc.), the chemical formula which best characterizes the ideal for Al2O3-2 sio2-2 h2o, its main mineral compositions are kaolinite and much water kaolinite, in addition to the kaolinite mineral clusters, and the montmorillonite, illite and pyrophyllite, quartz and feldspar and other minerals associated.

The chemical composition of kaolinite containing a large number of Al2O3, SiO2, and a small amount of Fe2O3, TiO2 and trace of K2O, Na2O, CaO and MgO style, etc. The chemical composition of kaolinite, the analysis in theory, should be: silica (SiO2) 46.5%, 3 oxidation 2 aluminium (Al2O3) 39.5%, 14% water (H2O).

 

Characteristics of kaolin

1. High whiteness, strong hiding power, good light scattering performance, can provide good covering properties, adjust the gloss of coating, replace part of titanium dioxide to reduce the production cost;

2. The low content of impurities, strong chemical inert, does not react with any other additives, solvents;

3. Good suspension, easy to disperse, have excellent anti sedimentation effect, improve the storage stability of coatings;

4. Fine particle size and uniform distribution, can improve the coating brushing, improving coating on the absorption of moisture resistance and impact resistance, improve the color and hair flower pigment anti-uplift, improve mechanical properties of paint film, improve the scrub resistance of coatings, the abrasion resistance and weatherability

 

Kaolin used

Suitable for high-grade paint, coating, ink, rubber, plastics, wire and cable, etc.

Alternative 1. Paper's making and coating part expensive titanium dioxide.

2. Paint, water-based latex paint.

3. Rubber and special cable reinforcing agent, the function of industrial plastic packing, printing ink, food, medicine, cosmetic packing.

4. The senior porcelain and ceramics raw material.