Investigation of an oxygen-converter semifabricate deoxidation possibility by lump silicon carbide for the purpose of improving production quality index
DOI:
https://doi.org/10.31498/2225-6733.39.2019.201041Keywords:
converter, metal melt, deoxidation, silicon carbide, chemical composition, average differencesAbstract
The most important operation in steelmaking is rational deoxidation of metal and slag, including deoxidation technology and the choice of deoxidizers. This action directly influences the number of non-metallic inclusions and their properties. The choice of both the deoxidizer type and deoxidation technology is tackled by each metallurgical enterprise in its own way. Nowadays, various metallic and nonmetallic materials used for metal deoxidation have found widespread use. These include the traditional ones – ferroalloys, pig-iron and powdered aluminum, and the wastes from metallurgical industries: aluminum, vanadium and abrasive slags, silicon carbide that have found wide application of late. At present, it has become quite obvious that the use of various types and techniques of deoxidation and out-of-furnace treatment of metal melt makes it possible to solve many problems in each specific production. In doing so,it is possible to solve the following tasks: to regulate the number and composition of non-metallic inclusions; to reduce the cost of steel due to the optimization of metallurgical processing, in relation to specific production conditions; to ensure the required quality of the products. Therefore, work aimed at further improving the methods of out-of-furnace processing in each specific production is, of course, promising and relevant. The prerequisite for the choice of deoxidation methods and the choice of deoxidizers as well as after-furnace treatment should be a comprehensive study of the metal at various stages of the metallurgical redistribution. This paper presents the results of the study of the steel production process using silicon carbide as a deoxidizer in the production of converter steel, smelted in 350 t converters with top blowing of Azovstal Iron and Steel Works. Based on the data on the chemical composition and temperature of the metal melt obtained in the conditions of oxygen conversion, using the StatSoft Statistica 10.0 application software package, the analysis of silicon carbide effect on the significance of the difference in the average chemical converter melt composition has been madeReferences
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