Processing of Metal Waste-Sludge from the Galvanizing Plants

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10251077" target="_blank" >RIV/61989100:27360/22:10251077 - isvavai.cz</a>

Alternative codes found

RIV/04130081:_____/22:N0000033

Result on the web

<a href="https://www.mdpi.com/2075-4701/12/11/1947" target="_blank" >https://www.mdpi.com/2075-4701/12/11/1947</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met12111947" target="_blank" >10.3390/met12111947</a>

Result language

angličtina

Original language name

Processing of Metal Waste-Sludge from the Galvanizing Plants

Original language description

This paper deals with the possibility of obtaining zinc from waste galvanic sludge, which is formed during galvanic plating. The aim of the experimental and practical part was to obtain zinc after the leaching of galvanic sludge. Leaching was performed in sulfuric acid, nitric acid and hydrochloric acid at different temperatures and time intervals with the addition of oxidizing agents as hydrogen peroxide or ozone. A separation of the leach and filtrate using filtration followed. The leach was further processed by a precipitation of iron and other metals using various agents. After a further filtration, the electrolysis was performed in order to obtain pure zinc on the cathode at the electrical voltage of approximately 3.5 V. Leaching using a solution of sodium hydroxide or potassium hydroxide was also performed when the prior dissolving of a major part of zinc into the leach occurred, while iron and non-ferrous metals remained in the leaching residue. After the filtration of the leach, the electrolysis with a high zinc yield of a purity of more than 99% followed. This way seems to be an optimal one for building a semi-industrial line for galvanic sludge recycling. All the partial products, i.e., the leach, the leaching residue, the filtrate, the solid precipitate and the separated metal on the cathode were subjected to chemical analyses. The analyses results are presented in tables and graphs.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/SS01020312" target="_blank" >SS01020312: Innovative technology of the closed loop water circulation in the electro-galvanizing process and processing of metal waste – sludges and filtration cakes from the galvanizing plant</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Volume of the periodical

12

Issue of the periodical within the volume

11

Country of publishing house

CH - SWITZERLAND

Number of pages

27

Pages from-to

nestrankovano

UT code for WoS article

000895724000001

EID of the result in the Scopus database

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