Kaolin is a white, soft, malleable mineral comprising primarily fine-grain, platelet-shaped particles, and is commonly found in nature.
Kaolin is formed when the anhydrous aluminium silicates found in rock with a high proportion of feldspar (e.g. granite) are modified by erosion or hydrothermal processes. The process that transforms hard granite into the white substance found in kaolin mines is called “kaolinization.” The quartz and mica contained in the granite remain largely unchanged, while the feldspar is transformed into kaolinite.
The whiteness and malleability of kaolin make it suitable for use as fillers, thinners, extenders and pigments, and it is also a raw material for ceramics and fireproofing. It is a unique industrial mineral that remains chemically inert across a relatively broad range of pH values. Moreover, kaolin is soft, non-abrasive and is a poor conductor of heat and electricity. Due to the individual mineralogical profiles of the various deposits, the kaolins from Quarzwerke Group in particular are used in many applications requiring very specific characteristics.
We offer kaolin in granulate form, as slurry, as milled products, as refractory clay, or partially refined as raw kaolin, suitable for the respective processing and production methods of our customers.
Key applications for kaolin:
• Paper industry
• Fibre glass
• Paint & coating
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