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RECYCLING OF ZINC BY- PRODUCTS

Maria Vlad

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s21.113View metrics

Abstract

The paper presents the main factories which determine the environment pollution at hot dip galvanization process of steel sheet and developing of recycling technologies of zinc by-product, with a view to recovering metal zinc or different sub- products, and returning them in the production cycle. By th e recycling of zinc by- products the prime material consumption is reduced and enviro nmental protection is improved. Industrial wastes generated in the hot dip galvanization pr ocess of steel sheet are: zinc ash, dross, flue dusts, sludge, etc. Dross and ash have high content of zinc, about (80Г·95%). Have been studded the influence of the hot dip galvanizati on conditions on waste quantity, chemical composition of these and the impact on environmental protection. The hydrometallurgical processing was used for processing of these wastes because this method determine reduce energy consumptions and materials. Solubilisation of zinc by- product carried out in acid solutions on basis of H 2SO4 and HCl for recovering of metal zinc by electrolytic methods and ion- exchanging resins retaining procedures.

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Publication details

Title
RECYCLING OF ZINC BY- PRODUCTS
Authors
Maria Vlad
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
drossashhot dip galvanizationhydrometallurgy
References8

  1. M. Martin, R. Wildt, An Introduction to Recycling Zinc Coated Steel, IZA, 2001.

  2. A. V. Shitov, A. N. Klimushkin, O. A. Stolyarskii, E. N. Agapeev, Recycling of the dross formed in hot galvanizing, Metallurgist, Vol. 49, Nos. 7–8, 2005.

  3. T. Radu, L.Balint, M Vlad, Research on the complex microalloyed zinc melts, The Annals Of ‘Dunărea De Jos’ University Of Galaţi, Fascicle IX Metallurgy And Material Science, nr. 2( 2010), ISSN 1453 –083X,

  4. T. Radu, F. Potecasu, M. Vlad, Research on obtaining and characterization of zinc micro-alloyed with bismuth coatings, METAL 2010, May 18-20,Czech Republic.

  5. Emission Estimation Technique Manual for Galvanizing version 1.1, National Pollutant Inventory, Feb. 2001, 7-9.

  6. Ph. Beguin, M. Bosschaert, S, D. Dhaussey, R. Pankert, Galveco©, A Solution for Galvanizing Reactive Steel, Intergalva 2000.

  7. G. Rossini, A. Bernades, Galvanic sludge metals recovery by pyrometallurgical and hydrometallurgical treatment, Journal of Hazardous Materials, 131(1-3), 2006, 210-216.

  8. F. Oprea, M. Vlad, Recycling by hidrom etalurgical way of zinc by-products from termic zinc coating, Acta Metallurgica Slovaca, vol 4, no. 1, 1998, 176-181.

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