Method for the thermal treatment of kieselguhr, thermally-treated kieselguhr and use of such a kieselguhr

摘要

The invention relates to a method for the thermal treatment of kieselguhr, whereby at least one chemical crystal inhibitor is added before or during the treatment. Potassium compounds are preferably used as chemical crystal inhibitors. Calcium ions can favour the formation of the crystal phase. Said treatment gives a kieselguhr with a combustion loss of less than 2 %, comprising less than 1 % crystalline silicon dioxide. Said kieselguhr is particularly suitable for the thorough filtration of liquid media.