Reduction Kinetics Behavior of FeO-CaO-SiO2-MgO-Al2O3 Molten Slag Using Solid-Carbon

• Autorzy: Gao Q. , Shen Y. , Wei G. , Shen F.

Identyfikatory

DOI

10.24425/118936

• Języki publikacji: EN

Abstrakty

EN

Reduction of FeO-bearing molten slag using solid-carbon, existing in primary slag of blast furnace (BF), consumes much BF energy. It is also a limit for BF efficiency. In this paper, reduction kinetics behavior of FeO-CaO-SiO₂-MgO-Al₂O₃ molten slag (primary slag of BF) was investigated, and the restrictive step of the reaction was identified. It has been found that the reduction process of FeO-CaO-SiO₂-MgO-Al₂O₃ BF slag using solid-carbon is a second-order reaction. And the reduction process is controlled by both diffusion of FeO and gasification reaction of carbon in molten slag. The apparent activation energy of reaction is 342.37 kJ/mol, the diffusion activation energy of FeO in molten slag is 355 kJ/mol, and the gasification reaction activation energy of carbon is 152.98 kJ/mol. Additionally, it is also concluded that reduction rate is influenced by temperature (T), mass fraction of FeO (w_(FeO)), and basicity (R) of the slag. Moreover, a reduction model of this slag system was established and verified by a series of experiments.

Słowa kluczowe

EN

kinetics; molten slag; reduction; blast furnace; carbon

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 1
• Strony: 257--263
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Gao Q.

• Northeastern University, School of Metallurgy, Shenyang, 110819, China

autor

Shen Y.

• University of New South Wales, School of Chemical Engineering, NSW 2052, Australia

autor

Wei G.

• Northeastern University, School of Metallurgy, Shenyang, 110819, China

autor

Shen F.

• Northeastern University, School of Metallurgy, Shenyang, 110819, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).