MATHEMATICAL MODELING OF HYDRODYNAMIC PROCESSES AND MASS TRANSFER IN THE CONVERTER BATH WHEN USING THE IRON-CONTAINING CONCENTRATES OF SLAG PROCESSING COMPLEXES

A significant part of the steel industry wastes are steel smelting slags, the output of which is estimated at an average from 150 to 200 kg/ton of steel. With the existing volumes of steel production in theRussian Federationannually approximately 9 million tons of steelmaking slag is generated. They contain 8 – 11 % of pure metal, and 15 – 40 % in the form of iron oxides. The total amount of iron reaches 20 – 30 % of the mass of the slag. Steelmaking slags are valuable iron-containing technogenic materials that require further processing and recycling in the production. For the processing of the formed steel-smelting slags, JSC “EVRAZ ZSMK” operates a slag processing complex, which is a technological line allowing step-by-step separation of iron-containing inclusions from converter slag due to the use of magnetic separation methods. The obtained iron-containing concentrate is a fraction material: 0 –10 mm– intended for use in agglomeration production, 10 –80 mm– in blast-furnace production and 80 –250 mmin steelmaking. The analysis of the possibility of the use of iron-containing concentrates with the fraction of 0 – 10 and 10 –80 mmduring steel smelting in 160-ton converters was carried out. On the basis of the developed mathematical model, a series of multivariate calculations were carried out to study the dynamics of melting and averaging the addition of iron-containing concentrates at various trajectories of input and its various amounts. Analysis of the results of mathematical modeling made it possible to obtain new information on hydrodynamic processes during the blowing of the converter bath with addition of iron-containing concentrates of the slag processing complex JSC “EVRAZ ZSMK”. 

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