Získávání zinku z neutralizačního kalu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F06%3A00017647" target="_blank" >RIV/60461373:22310/06:00017647 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Recovery of zinc from neutralising sludge

Popis výsledku v původním jazyce

In this study the hydrometallurgical processing of neutralising sludge generated by the Czech plating industry was investigated on a laboratory scale. The sludge, disposed off as a hazardous waste, could be considered as a secondary raw material to recover valuable metals such as Cu, Ni and Zn. The amount of zinc sludges formed in the Czech Republic is several times higher then that of other neutralizing sludges. For this reason, a simple method of processing zinc waste galvanic sludge containing 26.4%Zn, 4.1% Cu and 2.0% Ni was developed and verified in this study. To establish optimum parameters of the proposed method, the sludge was leached in concentrated NaOH solutions at elevated temperatures and different liquid-to-solid ratios. The leach liquor was subsequently subjected to purification using cementation technique. Final process step, the zinc electrowinning, was performed with refined zinc caustic leach liquors. Effects of operational variables on Zn electrowinning have been

Název v anglickém jazyce

Recovery of zinc from neutralising sludge

Popis výsledku anglicky

In this study the hydrometallurgical processing of neutralising sludge generated by the Czech plating industry was investigated on a laboratory scale. The sludge, disposed off as a hazardous waste, could be considered as a secondary raw material to recover valuable metals such as Cu, Ni and Zn. The amount of zinc sludges formed in the Czech Republic is several times higher then that of other neutralizing sludges. For this reason, a simple method of processing zinc waste galvanic sludge containing 26.4%Zn, 4.1% Cu and 2.0% Ni was developed and verified in this study. To establish optimum parameters of the proposed method, the sludge was leached in concentrated NaOH solutions at elevated temperatures and different liquid-to-solid ratios. The leach liquor was subsequently subjected to purification using cementation technique. Final process step, the zinc electrowinning, was performed with refined zinc caustic leach liquors. Effects of operational variables on Zn electrowinning have been

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 13. Internationaler Studententag der Metalurgie

ISBN

3-901 384-18-9

ISSN

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e-ISSN

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Počet stran výsledku

372

Strana od-do

41-48

Název nakladatele

Montanuniversität Leoben

Místo vydání

Leoben

Místo konání akce

Leoben

Datum konání akce

30. 3. 2006

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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