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The physicochemical basis of iron polysilicate sulfide technology is considered. Using a variety of physicochemical studies, the system of "amorphous silicon dioxide -iron chloride" was studied, not only the interaction between the components in this system with the formation of iron polysilicate was proved, but also the activating effect of the modifier on the filler. In the study of the "iron chloride -sulfur" system, the interaction of the components and the activating effect of the Lewis acid were also proved. Using the Priroda 6 quantumchemical program, the spatial structure of the interaction product was simulated in the ternary system "amorphous silicon dioxide -iron chloride -sulfur" -iron polysilicate sulfide, its stability, and strength were substantiated. Based on the results, the technology of sulfide materials is proposed. The optimal composition of the sulfide material and the optimal synthesis mode were selected. Samples of optimal composition were tested for frost resistance and resistance to aggressive environments (frost resistance of 170-180 cycles, a coefficient of stability in alkalis of 0.96-0.98%, strength 70 MPa, water absorption of 5%). The high physical and mechanical properties of the materials obtained are due to the chemical interaction of the components. Reducing the cost of synthesized sulfide materials based on silica-containing rocks of the Dobrinsk deposit and the waste of iron chloride compared to the analog -silicate concrete grade M350 amounted to 25.4% or 2611.8 rubles. for 1m3.

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A technology has been developed for the processing recycling of waste - sulfuric cake into building materials with high physical and mechanical characteristics. Sulfur activator (zinc chloride) contributed to the chemical bonding of the components.