METHOD OF PRODUCING HIGH-STRENGTH GYPSUM Russian patent published in 2017 - IPC C04B11/02 

FIELD: technological processes.

SUBSTANCE: present invention relates to method of producing high-strength gypsum by boiling in liquid mediums at atmospheric pressure. Method includes preliminary mechanical activation of gypsum dihydrate and subsequent treatment of activated gypsum dihydrate with water at temperature of 97–100 °C during 4 hours, wherein calcium sulphate dihydrate is subjected to subsequent processing, in which amount of stored energy corresponding to change of interplanar distances of crystal lattice is at least 312 kJ/mol and total amount of energy corresponding to change of surface area of coherent scattering and microdeformations is in range of 5.6–5.8 kJ/mol.

EFFECT: technical result consists in highest degree of conversion of gypsum dihydrate, effective pretreatment of gypsum dihydrate before boiling.

5 cl, 1 tbl