RESEARCH OF PHYSICAL AND CHEMICAL REGULARITIES OF COMPREHENSIVE PROCESSING OF FUMINGOUS SLAGS USING A DISTILLED LIQUID

To date, the disposal of waste from the production of soda ash using the ammonia method is an urgent problem in all countries producing soda according to the ammonia method. In this regard, a technology has been proposed for the integrated processing of lead fuming slags using distilled liquid as a chlorinating component, which allows solving the problem of the utilization of industrial wastes from the metallurgical and chemical industries simultaneously. The distilled liquid, which is a waste of soda production, is a solution of calcium and sodium chlorides contaminated with impurities of calcium carbonate and sulfate, slaked lime, sand and other substances that are mainly in the solid phase. The distiller liquid is 8.5m³ ton of soda, g / m³: СаСl₂ 118-125; NaCl 58,6-80 ; CaCO₃ 6-15; CaSO₄ 2-2,7; Mg(OH)₂ 3-10; CaO 2-4; Fe₂O₃ +Al₂O₃ 1-3; SiO₂. Thermodynamic modeling of systems characteristic of sintering firing established technological parameters and compositions of raw mixtures that provide the maximum degree of extraction of metal chlorides. For carrying out agglomeration-chloride sublimation roasting of slag, the process temperature should not exceed the melting point of the slag (12000С), that is, a maximum of 1100-11500С. The compositions of raw mixtures based on fuming slag, distilled liquid, bentonite clay and coal wastes were experimentally established, which ensure the recovery of lead-80.97%, zinc-78.09%, copper-76.52%. The physical and mechanical properties of the granules after roasting indicate high dynamic and static strength.

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