FIELD: chemistry.
SUBSTANCE: method of producing complex magnesium-phosphate fertilizers by the mechanochemical method of processing the original technological industrial wastes is proposed: phosphogypsum dump (30%), serpentinite dumps (25%), dumps of silica gel (15%), magnesium sulphate (15%), calcium sulphate (15%), - in a rotary disperser (2000-3000 rpm), without a need of a high-temperature treatment that allows to create the amorphous state of the crystal lattice of phosphogypsum and serpentine, due to the introduction of ions, R+5 with a large radius in the crystal lattice of MgSO4, with the substitution in the tetrahedral SO4-2 of ions S+6 with a smaller radius.
EFFECT: invention allows to simplify the technological process, to eliminate a high temperature acid decomposition of serpentine raw material and to involve technogenic raw material - dehydrate hosphogypsum in the process, as a result, the ecological problem of industrial waste disposal is solved.
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