THERMODYNAMIC DIAGRAM ANALYSIS AND SMELTING OF COMPLEX Fe-Cr-Mn-Si FERROALLOY
Gabdullin S. Makhambetov Y. Saulebek Z. Akhmetov A. Zulhan Z. Mukhtarkhanova G. Toleukadyr R. Dyussenbekov K.
18 June 2024Technical University of Kosice
Acta Metallurgica Slovaca
2024#30Issue 257 - 63 pp.
A state diagram of the Cr-Mn-Si-Fe metallic system, which simulates the compositions of complex chromium-manganese-silicon-containing ferroalloy (Fe-Cr-Mn-Si), has been constructed using thermodynamic-diagram analysis. Theoretical investigations have determined that the system comprises eight elementary tetrahedra. The sum of the relative volumes of the elementary tetrahedra equals one (1.00000), confirming the accuracy of the tetrahedration conducted. Analytical expressions for each tetrahedron have been de-rived. Calculations have determined the tetrahedron characterizing the phase composition of the ferroalloy. This tetrahedron is iden-tified as the most voluminous phase triangle in the Cr-Mn-Si-Fe metallic system, implying that its significant volume facilitates the smelting process of chromium-manganese-silicon-containing ferroalloy, i.e., there is the possibility of freely regulating the charge compositions to achieve the required alloy grade. Based on the obtained results, an experimental smelting of the Fe-Cr-Mn-Si ferroal-loy was conducted using a charge composed of chromium ore, low-grade manganese ore, and coke, resulting in a sample with the following composition, %: 44.07 Cr, 13.97 Fe, 12.48 Mn, 9.48 Si, 4.45 C. The microstructure comprises a complex silicide (Cr, Fe, Mn)3Si and Cr3C2 carbides.
chromium , complex ferroalloy , diagram , Hizes method , manganese , phase , silicon
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Laboratory of Ferroalloys and reduction processes, Zh. Abishev Chemical-metallurgical institute, Ermekov 63, Karaganda city, Kazakhstan
Metallurgical Engineering Department, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesa No. 10, Bandung, 40132, Indonesia
Research Institute “INNTECH”, 018 accounting quarter building 22/1, Karaganda city, Kazakhstan
The National University of Science and Technology MISIS, Leninskiy Prospekt 4, Moscow, Russian Federation
Laboratory of Ferroalloys and reduction processes
Metallurgical Engineering Department
Research Institute “INNTECH”
The National University of Science and Technology MISIS
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