The use of sponge iron in steel smelting

Leshchenko, I. P.; Tereshchenko, V. T.; Martynov, O. V.; Trakhimovich, V. I.; Borzenkov, D. V.

doi:10.1007/bf01094155

Cited by 2 publications

(2 citation statements)

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“…Oxidized iron-containing ore, concentrate, or pellets using solid or gas as a reducing agent without melting the metallic iron is obtained by the product is called sponge iron (Direct Reduced Iron, DRI). Sponge iron is utilized as an alternative raw material in electric arc furnaces and basic oxygen furnaces as charging materials because of its high degree of metallization, presence of certain oxide gangue, porous structure, stable composition, and low trace element content (Mazurov et al, 1964;Leshchenko et al, 1973;Selan et al, 1996;Rose and Walden, 1988;Çamcı et al, 2002;Chukwuleke et al, 2009;Turgut, 2010;Kumar and Khana, 2012;Sen et al, 2015;Dey et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Optimization of sponge iron (direct reduced iron) production with Box-Wilson experimental design by using iron pellets and lignite as reductant

Sönmez,

Şahbudak

2023

revmetal

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Turkey’s iron ores may be used to manufacture sponge iron, and the country’s coal resources, which are plentiful despite being of poor quality, can be used as a reducing agent. With such a production, Electric Arc Furnace based on scrap imports, will be an alternative raw material for steel production, and this will create high value due to the usage of domestic resources. In this study, sponge iron production was tried to be optimized by using local sources. For this purpose, the effects of time, temperature and [CFix/FeTotal] weight ratio on the Reduction Degree (%) of the important parameters effective in the production of sponge iron by using Divriği Iron Pellets and Dodurga Lignite as a reductant were studied using a Box-Wilson experimental design. The optimum parameters were determined as 82.59 min, 996.73 °C and 0.49, and the highest Reduction Degree (%) value was calculated as 96.46%. The sponge iron obtained with a 71.91% Reduction Degree contains 97.12% Fe, of which 7.12% is oxidized. It is evident that higher Fe contents may be attained with research carried out in optimum parameters.

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Section: Introductionmentioning

confidence: 99%

Optimization of sponge iron (direct reduced iron) production with Box-Wilson experimental design by using iron pellets and lignite as reductant

Sönmez,

Şahbudak

2023

revmetal

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“…High purity sponge iron powder is currently manufactured from high purity iron ore following the basic steps of magnetic separation and milling, primary reduction process, hydrogen annealing, and final milling and classification. Due to a promising availability of coal, the coal-based sponge iron plants share the major amount of its production [4][5][6][7][8]. In this study, direct reduction of mill scale in a rotating furnace using gas and solid reductants was carried out and then final product was analyzed to determine the degree of metallization.…”

Section: Introductionmentioning

confidence: 99%

Direct Reduction of Ferrous Oxides to form an Iron-Rich Alternative Charge Material

Ünal

Turgut

Atapek

et al. 2015

High Temperature Materials and Processes

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In this study, production of sponge iron by direct reduction of oxides and the effect of reductant on metallization were investigated. In the first stage of the study, scale formed during hot rolling of slabs was reduced in a rotating furnace using solid and gas reductants. Coal was used as solid reductant and hydrogen released from the combustion reaction of LNG was used as the gas one. The sponge iron produced by direct reduction was melted and solidified. In the second stage, Hematite ore in the form of pellets was reduced using solid carbon in a furnace heated up to 1,100°C for 60 and 120 minutes. Reduction degree of process was evaluated as a function of time and the ratio of C fix / Fe total . In the third stage, final products were examined using scanning electron microscope and microanalysis was carried out by energy dispersive x-ray spectrometer attached to the electron microscope. It is concluded that (i) direct reduction using both solid and gas reductants caused higher metallization compared to using only solid reductant, (ii) as the reduction time and ratio of C fix / Fe total increased %-reduction of ore increased.

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The use of sponge iron in steel smelting

Cited by 2 publications

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Optimization of sponge iron (direct reduced iron) production with Box-Wilson experimental design by using iron pellets and lignite as reductant

Optimization of sponge iron (direct reduced iron) production with Box-Wilson experimental design by using iron pellets and lignite as reductant

Direct Reduction of Ferrous Oxides to form an Iron-Rich Alternative Charge Material

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