Relation Between the Zn (II) Chemical Speciation and its Acid Leaching from Fine Grained Metallurgical Wastes

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Relation Between the Zn (II) Chemical Speciation and its Acid Leaching from Fine Grained Metallurgical Wastes

Popis výsledku v původním jazyce

The forms of zinc in the blast furnace and steelmaking sludge were determined applying the sequential extraction method of chemical speciation. In the blast furnace sludge zinc is largely present in the ion-exchange and superficially occluded form and that is why its sepatation by acid leaching may be successful. These assumptions were proved when studying the heterogeneous acid-base equilibrium in discontinual static leaching under mild acidic conditions - c(HCl) max. 0.1 mol.dm-3, when 77% of zinc were extracted and iron practically did not pass into solution. As for the steelmaking sludge, an unambiguous correlation between the chemical speciation and acid leaching has not been found. Buffering equilibrium is establised at pH 5,5 and that is connected with the presence of iron in the lower oxidation states, especially in the fe(II) form.

Název v anglickém jazyce

Relation Between the Zn (II) Chemical Speciation and its Acid Leaching from Fine Grained Metallurgical Wastes

Popis výsledku anglicky

The forms of zinc in the blast furnace and steelmaking sludge were determined applying the sequential extraction method of chemical speciation. In the blast furnace sludge zinc is largely present in the ion-exchange and superficially occluded form and that is why its sepatation by acid leaching may be successful. These assumptions were proved when studying the heterogeneous acid-base equilibrium in discontinual static leaching under mild acidic conditions - c(HCl) max. 0.1 mol.dm-3, when 77% of zinc were extracted and iron practically did not pass into solution. As for the steelmaking sludge, an unambiguous correlation between the chemical speciation and acid leaching has not been found. Buffering equilibrium is establised at pH 5,5 and that is connected with the presence of iron in the lower oxidation states, especially in the fe(II) form.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DM - Tuhý odpad a jeho kontrola, recyklace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2000

Kód důvěrnosti údajů

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

Název periodika

Acta Metallurgica Slovaca

ISSN

1335-1532

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

310-317

Kód UT WoS článku

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EID výsledku v databázi Scopus

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