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Leaching of Non-Ferrous Metals from Galvanic Sludges

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Abstract:

The problem of processing slimes of galvanic production, formed as a result of neutralization of technological solutions and wastewater containing heavy non-ferrous metals is considered. At present, sludges are transported to disposal area and are not used in any way. Typically, such sludges contain significant amounts of chromium and nickel, which creates environmental hazard. Investigated sludge of Dimitrovgrad Automobile Units Plant (Russia) contains up to 6.6% Ni and up to 7,4% Cr. The hydrometallurgical process is proposed to treatment of these sludges. Solutions of sulfuric acid, ammoniaс chloride and Trilon B were used as lixiviants. It is shown that when using a solution of sulfuric acid with pH=1,5, extraction of up to 93,3% Cu, 70,2 Ni, 90,3 Zn is achieved.

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Periodical:

Materials Science Forum (Volume 946)

Pages:

591-595

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.946.591

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Online since:

February 2019

Authors:

Olga Yu. Makovskaya*, K.S. Kostromin

Keywords:

Chromium, Galvanic Slimes, Hydrometallurgy, Leaching, Nickel

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