METHOD OF GYPSUM ACTIVATION Russian patent published in 2018 - IPC B02C19/18 C04B40/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and can be used in the manufacture of building products, for example panels, facing plates. Method for activating gypsum involves preliminary treatment of gypsum with a vortex layer of anisotropic ferromagnetic bodies in a nonmagnetic vessel located in the apparatus with an external electromagnetic field. In this case, gypsum is fed by a rotating screw through the inner cavity of a nonmagnetic continuous tube to the zone of rotating anisotropic ferromagnetic bodies 1.2 mm in diameter and 5–10 mm in length. Bodies have a working zone energy saturation of at least 100 kW/m³. Movement of bodies is provided by the apparatus with an external electromagnetic field. In this case, axis of the cylindrical non-magnetic tube is made at an angle of 5–25 degrees in the direction of gypsum supply.

EFFECT: method provides an increase in the bending and compression strength of building products.

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