Kaolin composed by kaolinite mineral in the shape of small flakes less than 2 microns and tubular.

Clay mineral and non-clay mineral are the main compositions of Kaolin. Clay mineral includes kaolin rocks, hydro mica, montmorillonite and chlorite. Non-clay minerals mainly composed by quartz, feldspar and mica and aluminum oxides and hydroxides, iron minerals (white iron ore, magnetite and siderite), iron oxides (ilmenite, rutile, etc.), organic (plant fibre, organic peat and coal).

Pure Kaolin with high whiteness, soft, easy disperses supspended in the water, good plasticity and high bonding, excellent electrical insulating properties, low cation exchange capacity, higher refractoriness and other physical and chemical properties.

Natural Kaolin ores can be divided into three types according to its causes, quality, plasticity and sandy(quartz, feldspar, mica and other minerals, whose size is over 50 microns), like hard rock kaolinite, soft and sandy kaolin. Please read the following information in Chart 1.

Type and features of Kaolin

Boer Kaolin in accordance with its purpose and the main characteristics(showed in chart 2) to through floatation, machining and chemical treatment, remove harmful impurities (free quartz, etc.), then make out friction(BE-FK40) and sealing(BE-SK06) material according to its special application.