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Development of the Technology for the Extraction of Zinc and Iron from Metallurgical Waste

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Abstract

The physicochemical regularities of the carbon-thermal reduction of zinc and iron oxides from blast-furnace sludge, as well as from the dusts of gas-cleaning installations of steel-smelting furnaces, have been studied. The joint carbon-thermal reduction of zinc and iron oxides in granules from a mixture of blast-furnace sludge and steelmaking dust has been studied. The optimal parameters of the process in terms of the content of solid carbon in the granules, oxygen in the gas phase, as well as temperature range of reduction and the duration of the process have been determined. Bench tests have been carried out, which made it possible to determine the main regime parameters of the technological process for processing zinc-containing dusts of metallurgical production and justify the choice of the unit for these purposes. It is shown that the reductive annealing of granules from zinc-containing dust makes it possible to almost completely remove zinc from granules and metallize iron. A technology has been developed that makes it possible to obtain granules from zinc-containing dusts and process them in a rotary kiln with complete stripping of zinc and trapping it in bag filters, and to use metallic iron remaining in the granules in the metallurgical process.

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Authors and Affiliations

  1. Ural Federal University, 620002, Yekaterinburg, Russia

    B. P. Yur’yev, V. A. Gol’tsev & V. A. Dud’ko

  2. Institute of New Materials and Technologies, Ural Federal University, 620002, Yekaterinburg, Russia

    B. P. Yur’yev, V. A. Gol’tsev & V. A. Dud’ko

Authors
  1. B. P. Yur’yev
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  2. V. A. Gol’tsev
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  3. V. A. Dud’ko
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Correspondence to V. A. Dud’ko.

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Translated by Sh. Galyaltdinov

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Yur’yev, B.P., Gol’tsev, V.A. & Dud’ko, V.A. Development of the Technology for the Extraction of Zinc and Iron from Metallurgical Waste. Steel Transl. 53, 384–391 (2023). https://doi.org/10.3103/S0967091223040204

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