Synthesis of new inorganic fibres

A new method of gypsum fibres synthesis based on the recrystallization of g ypsum in 6%, 8% acid 10% hydrochloric medium is described. The solutions ha ve been cooled down from 80 degrees C to 60 degrees C and from 60 degrees C to 20 degrees C at the rate of 0,2 degrees C and 0,1 degrees C per minute, respectively. Natural, synthetic, and waste gypsum from power plant flue g ases desulfurization process can be used as a raw materail. Additives such as ferric sulfate, aluminum sulfate or dimethylaminobenzoic aldehyde lead t o the elongation of gypsum fibres.