METHOD OF OBTAINING HOMOGENEOUS FINELY DISPERSED HIGHLY ACTIVE MASS OF BULK MATERIAL IN PHOSPHOGYPSUM UTILISATION Russian patent published in 2014 - IPC C04B11/26 B02C13/14 

FIELD: chemistry.

SUBSTANCE: method of obtaining a homogeneous finely dispersed highly active mass of a bulk material (gypsum binding agent) in phosphogypsum utilisation contains the following steps: drying initial phosphogypsum with application of discharge hot gases of kilns; neutralisation of dried phosphogypsum by addition of neutralisers; performing final drying of the neutralised raw material by kiln; cooling the finally dried raw material; supply of the cooled raw material to activation lines for further crushing, mechanical activation, chemical and electric activation, which is performed by an aerodynamic vertical activator of a gravity type, which contains a vertical chamber of crushing, made in the form of a hollow cylinder, in lids of which installed is a shaft with a possibility of rotation; at least, two working discs are fixed on the shaft, and it additionally contains rods, installed in a wall of the vertical chamber of crushing, beaters, installed in a radial way on each surface of the working disc and projecting beyond the disc edges, with rods being installed in such a way that when the said discs with the beaters rotate the rods are located between the beaters, fixed on the discs.

EFFECT: obtaining quality, ecologically pure construction materials with low energy consumption.

3 cl, 3 dwg