Silicon behaviour at the blast furnace process

• Autorzy: Klimczyk A. , Stachura R. , Bernasowski M. , Łędzki A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Views on the reduction of SiO₂ at the blast furnace process began to change in the mid 70s. Nowadays it is claimed that the silicon appears in the metal not only from the slag SiO₂ reduction at the liquid phase, but also from a gaseous SiO. Presented in this paper, laboratory tests were aimed on finding the effect of temperature and MgO containing in the slag on the dynamics of the Si transition to the pig iron at the liquid phase at time when slag lies on metal. Design/methodology/approach: Laboratory tests carried out in laboratory on devices AGH described in detail in other studies such as [8-11]. Metal used in the study obtained by carbonizing the carbon-iron saturation assuming the values given by J. Chipman [7]. Findings: Observations of industrial units in combination with laboratory tests allowed us to approximately determine the contribution of silicon from the gaseous SiO in hot metal. Research limitations/implications: Si content in the metal after the test at a constant temperature is less than taping pig iron of about 0.15 to 0.35%. This means that in addition to the reduction reaction of the silica source of silicon in the slag is reduced gaseous SiO , which is in line with those of the authors [2-5, 8-10]. This will also be the subject of the next stage of research. Practical implications: As a result, developed guidelines and proposals for the conduct of blast-furnace technology to minimize Si in pig iron. Originality/value: The AGH research team has approached to issue of SiO₂ reduction complexly. The work is divided into stages. Laboratory studies combined with industry specific observations. As a result of this approach to work is possible to develop a practical technology to minimize silicon in the pig iron. Articles published in reputable journals on similar or related topics do not include all issues.

Słowa kluczowe

EN

silicon; silicon dioxide reduction; blast furnace

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 712--715
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Klimczyk A.

• Faculty of Metal Engineering and Industrial Computer Science, University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Stachura R.

• Faculty of Metal Engineering and Industrial Computer Science, University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Bernasowski M.

• Faculty of Metal Engineering and Industrial Computer Science, University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Łędzki A.

• Faculty of Metal Engineering and Industrial Computer Science, University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] T. Kootz, S. Wilms, Thyssen Forsh 3-4 (1972) 91-105.
• [2] K.H. Peters, E. Beppler, Stahl und Eisen 17 (1985) 889-895.
• [3] S. Furuya, R. Nakajama, Steel Technology International, 1992, 27-30.
• [4] W. Sabela, R. Budzik, Steel 8 (1992) 10-12.
• [5] N. Ponghis, Steel Technology International, 1993, 35-39.
• [6] Y. Niwa, et. al., Blast furnace operation for low silicon content at Fukuyama NO-5 blast furnace, International Science and Investigation Journal 31/5 (1991) 487-493.
• [7] J. Chipman, J.C. Fulton, N. Gokcen, G.R. Caskey Jr., Activity of silicon in liquid Fe-Si and Fe-C-Si alloys, Acta Metallurgica 2 (1954) 439-450.
• [8] R. Benesch, A. Łędzki, fur das Eisenhüttenwesen 44/11 (1973) 823-826.
• [9] A. Łędzki, Scientific Papers AGH Cracow, 1987, 106.
• [10] A. Łędzki, R. Benesch, AGH Report - research work.
• [11] A. Klimczyk, M. Sc. thesis, AGH, Cracow, 1996.