Energy-efficient reduction of iron from its ores

Nokhrina, O. I.; Rozhikhina, I. D.; Рыбенко, И. А.; Khodosov, I. E.

doi:10.3103/s0967091216040082

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…Прокатная окалина образуется в результате вторичного окисления поверхностного слоя металла при нагреве перед прокаткой. При нагреве 1 т стали образуется примерно 25-30 кг окалины (2,5-3,0 %) [8]. По данным WSA [5], в мире ежегодно образуется до 50 млн т прокатной окалины, в Россиидо 1,5 млн т. На площадке строительного проката АО ЕВРАЗ ЗСМК за год образуется примерно 200 тыс.…”

Section: общая характеристика материалов и методы их исследованияunclassified

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Study of physical and chemical properties of iron oxides-containing man-caused raw materials sinter production

Anikin

Galevsky

Руднева

2018

Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

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Results of studies of physical and chemical properties of rolling scale and dewatered sludge from gas-cleaning system of BOF plant quoted, carried out for estimation of technological advisability of application them in metallization processes. The studies carried out by application of standard methodics of determination of chemical, phase, grain-sized contents and density of fine and powder materials. It was determined, that content of total iron, FeO and Fe2O3oxides, Sulphur and Phosphor in the scale makes figures 73.3, 75.5, 20.9, 0.036 and 0.019 % correspondently, in the sludge – 41.2, 4.7, 53.7, 0.21 and 0.15 % correspondently. The sludge contains also up to 20.9% of CAO and 4.3% of total carbon. Grain-size contents of the scale and the sludge are considerably different: content of size grade +1.0 mm and –0.016 mm is in the scale 63.3% and 0%, in the sludge – 14.8 and 44.5 % correspondently. Real density of the scale is 4.6–4.9 g/sm3. The results obtained confirm a technological advisability of application of fine-grained scale and powdered sludge in metallization processes, including their preliminary briquetting comprising carbonic reduction agent.

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Section: общая характеристика материалов и методы их исследованияunclassified

“…Основными твердофазными процессами металлизации являются процессы Midrex, HyL, Danarex, Finmet и др. [5][6][7][8][9], а основными жидкофазными процессами восстановления железа -Corex, Finex, Ромелт, Ausmelt, HIsmelt, Technored и др. [2][3][4].…”

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Study of physical and chemical properties of iron oxides-containing man-caused raw materials sinter production

Anikin

Galevsky

Руднева

2018

Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

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“…Rolling scale is formed as a result of secondary oxidation of the metal surface layer when heated before rolling. When 1 ton of steel is heated, approximately 25-30 kg of scale is formed (2.5-3.0%) [20]. Up to 50 million tons of rolling ore are produced annually in the world, up to 1 million tons in Kazakhstan.…”

Section: Introductionmentioning

confidence: 99%

“…In technologies of scale de-oiling by flotation and centrifuges, it is not possible to obtain a solid phase of scale with an oil content of less than 4-5%; therefore, it is subjected to further processing [20].…”

Section: Introductionmentioning

confidence: 99%

Studies of the Possibility of Improving the Quality of Iron Ores and Processing of Technogenic Composite Iron-Containing Waste of Metallurgical Production

Yessengaliev,

Mukhametkhan,

Mukhametkhan

et al. 2023

J. Compos. Sci.

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Ferrous metallurgy has been and remains one of the main types of production activities that enables humanity to extract, process and produce basic equipment for all types of activities. The growth of ore production as well as the reduction in world reserves of the raw material base have lead to the search for effective methods of processing and preparation of waste for metallurgical processing. The mining and metallurgical sector of the Republic of Kazakhstan, which has its an integrated mining and metallurgical complex with its own coal, iron ore, and energy base, uses iron ores from several deposits. It also includes ash and sludge storage tanks, which store valuable metallurgical waste, such as converter production sludge, rolling scale, and others, the use of which is hindered by the presence of certain harmful impurities in the composition (a rather high content of non-ferrous metals, especially zinc, a high content of oils, etc.). These valuable technological wastes require additional research that may contribute to their use as a charge or as iron-containing components of the charge. Based on the urgency of the tasks of dephosphorylation of iron ores and utilization of human-made waste (converter sludge and rolling scale), studies were conducted to try to eliminate existing problems. The results of the research work make it possible to obtain metals based on prepared pellets with a significantly low phosphorus content; this will enable the use of an oiled rolling scale and converter sludge for the production of a metalized product for steel smelting. The resulting metalized products make it possible to dispose of scale and converter sludge by 70%, and the degree of iron extraction exceeds existing methods by 1–3.5% (92.1–94% vs. 95.6%).

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