ANALYSIS OF THE MECHANISM OF STRUCTURAL AGGREGATES FORMATION INCLUDED IN THE COMPOSITION OF A CHARGE OF IRON CONTAINING BRIQUETTES

The functional purpose of pore-forming additives with different specific surface areas and porosities has been evaluated. Their role in the formation of the structure of iron-containing briquettes is shown. The technological scheme for the production of metallurgical briquettes containing technological additives is substantiated. The scheme includes the mechanical preparation of pore-forming additives, dosing and primary selective mixing of components to obtain structural aggregates, the secondary stage of mixing the rest of the briquetted mass with structural aggregates, and their storage. The methods of conducting the experiment and processing the experimental data are presented. The results of the study of the dynamics of the mass gain of the components of the briquetted charge in the composition of structural aggregates are presented. The dependence of the weight gain of the charge components on the temperature of the liquid reducing agent and the technological scheme of mixing the components are analyzed. The design of structural units has been evaluated, and their role in predicting the metallurgical properties of iron-containing raw materials has been shown. An analysis of the design of structural charge aggregates based on pore-forming additives with different specific surface areas and porosities is presented. The assessment of the macro- and microstructure of the material under consideration is carried out, and their role in predicting the metallurgical properties of iron-containing raw materials is shown. The specific structure of pore-forming additives can enhance the functionality of highly porous materials and create structural aggregates with special properties. During the final briquetting process, these aggregates, which have primary structural strength, must preserve it and form a predictable briquette structure. Additional indicators characterizing the mass ratios between the components of structural aggregates are analyzed. The results of a study of the dynamics of mass gain of structural aggregates formed on base-charge materials of various fractional compositions are presented.

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