Alkaline Leaching of Low Zinc Content Iron-Bearing Sludges

• Autorzy: Gargul K. , Jarosz P. , Małecki S.

Identyfikatory

DOI

10.1515/amm-2016-0013

• Języki publikacji: EN

Abstrakty

EN

Various types of waste materials containing zinc (e.g. dusts and sludges from gas dedusting process) are obtained in steel industry. The contents of Zn in these materials may vary considerably. Even a low concentration of zinc in recirculated products precludes their recycling in ferrous metallurgy aggregates. Long storage of this type of material can lead to contamination of soil and water by zinc compounds which can be leached out by acid rain, for example. This paper focuses on research involving alkaline leaching tests of low zinc content iron-bearing materials. These tests were preceded by the analysis of the elemental, phase and grain size composition, and analysis of the thermodynamic conditions of the leaching process. The main aim of research was to decrease the content of the zinc in the sludge to the level where it is suitable as an iron-bearing material for iron production (~1% Zn). Leaching at elevated temperatures (368 K, 60 min) has led to a decrease in the zinc content in the sludge of about 66%. The research revealed that long hour leaching (298 K, 100 hours) carried out at ambient temperatures caused a reduction in zinc content by 60% to the value of 1.15-1.2% Zn.

Słowa kluczowe

EN

sludge; dust; alkaline leaching; Zn recovery; recycling

• 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: 2016
• Tom: Vol. 61, iss. 1
• Strony: 43--50
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr., wzory

Twórcy

autor

Gargul K.

• AGH University of Science and Technology, Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Jarosz P.

• AGH University of Science and Technology, Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

autor

Małecki S.

• AGH University of Science and Technology, Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] US Geological Survey, Mineral Commodity Summaries 2012.
• [2] M. D. Gerst, T.E. Graedel, In-use stocks of metals: Status and implicaitions, Environmental Science & Technology 42, 7038-7045 (2008).
• [3] C. Caravaca, A. Cobo, F. J. Alguacil, Considerations about the recycling of EAF flue dusts as source for the recovery of valuable metals by hydrometallurgical processes, Resources Conservation and Recycling 10, 35-41 (1994).
• [4] S. Kelebek, S. Yoruk, B. Davis, Characterization of basic oxygen furnace dust and zinc removal by acid leaching, Minerals Engineering 17, 285-291 (2004).
• [5] K. Gargul, B. Boryczko, Removal of zinc from dusts and sludges from basic oxygen furnaces in the process of ammoniacal leaching, Archives of Civil and Mechanical Engineering 15, 179-187 (2015).
• [6] V. I. Rodionova, On the Dissolution of Zinc in Alkalis, National Aeronautics and Space Administration, Washington 1965.
• [7] A. Stefanova, J. Aromaa, Alkaline leaching of iron and steelmaking dust, Aalto University 2012.
• [8] T. Havlik, Lecture Slides of Processing of Metallurgical Dusts by Hydrometallurgical Methods Seminar, Espoo 2009.
• [9] N. Leclerc, E. Meux, J. M. Lecuire, Hydrometallurgical extraction of zinc from zinc ferrites, Hydrometallurgy 70, 175-183 (2003).
• [10] Selected Values of Chemical Thermodynamic Properties - Tables for the First Thirty-Four Elements in the Standard Order of Arrangement, NBS Technical Note 270-3, National Bureau of Standards, Washington 1968.
• [11] E. L. Shock, D. C. Sassani, M. Willis, D. A. Sverjensky, Inorganic species in geologic fluids: correlations among standard molar thermodynamic properties of aqueous ions and hydroxide complexes, Geochim. Cosmochim. Acta 61, 907 (1997).
• [12] G. J. Bignold, A. D. Brewer, B. Hearn, Specific conductivity and ionic product of water between 50 and 271°C, Trans. Faraday Soc. 67, 2419 (1971).
• [13] A. J. B. Dutra, P. R. P. Paiva, L.M. Tavares, Alkaline leaching of zinc from electric arc furnace steel dust, Minerals Engineering 19, 478-485 (2006).
• [14] C. Jarupisitthorn, T. Pimtomg, G. Longhongkum, Investigation of kinetics of zinc leaching from electric arc furnace dust by sodium hydroxide, Material Chemistry and Physics 77, 531-532 (2002).
• [15] J. Antrekowitsch, H. Antrekowitsch, Hydrometallurgically Recovering Zinc from Electric Arc Furnace Dusts, JOM 12, 26-28 (2001).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę