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Goethyt i hematyt do odzyskiwania Zn (II)

Goethyt i hematyt do odzyskiwania Zn (II)

AFAF AMARA-REKKAB

104,10 €
IVA incluido
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Química
ISBN:
9786208872892
104,10 €
IVA incluido
Disponible

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Sobre IBD

Cynk, niezbędny w przemyśle metali nieżelaznych do zastosowań takich jak galwanizacja i obwody elektroniczne, jest wydobywany za pomocą pirometalurgii lub hydrometalurgii. Ten ostatni proces, po prażeniu blendy, obejmuje ługowanie kwasem (H₂SO₄) w celu rozpuszczenia cynku w ZnSO₄, a następnie galwanizację w celu uzyskania oczyszczonego cynku. Proces ten osiąga jednak stopień ekstrakcji ograniczony do 90%, pozostawiając stałe pozostałości bogate w ferryty metali (26% żelaza, 21% cynku). Od 1974 r. rafineria ALZINC w Algierii składuje te pozostałości, powodując zanieczyszczenie środowiska.Celem projektu jest wydobycie cynku z tych pozostałości poprzez ługowanie kwasem i wytrącenie żelaza w postaci goethytu, który jest wykorzystywany do produkcji hematytu, cennego pigmentu. Ekstrakcja kwasem pozwoliła na odzyskanie 12-14% cynku, podczas gdy metoda z goethytem pozwoliła na osiągnięcie wskaźnika odzysku na poziomie 19,43% przy wskaźniku ekstrakcji wynoszącym 91,43%. Ostateczna transformacja w hematyt, potwierdzona analizą (dyfrakcja rentgenowska i IR), dała pigment przemysłowy spełniający standardy badawcze.

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