Tehlikeli Atık Sınıfında Olan Elektrik Ark Fırını Baca Tozlarından Hidrometalurjik Yöntemler Kullanılarak Çinkonun Geri Kazanılması: Güncel Değerlendirmeler

Year 2020, Volume: 5 Issue: 3, 274 - 282, 30.09.2020

Ahmet Kalpaklı Şevval Ayaz Sedat İlhan , Mert Zorağa

https://doi.org/10.35229/jaes.726394

Abstract

Çelik üretiminde birincil hammadde kaynağı olarak demir cevheri kullanılırken; ikincil hammadde kaynağı ise çelik hurdalarıdır. Ülkemizde çelik üretiminin % 80’i hammadde olarak çelik hurdalarının kullanıldığı Elektrik Ark Fırınlarında (EAF) gerçekleştirilmektedir. EAF’de çelik üretimi sırasında 1 ton çelik başına hurda bileşimine bağlı olarak % 25-45 Zn içeren 14-20 kg baca tozu oluşmaktadır. Oluşan baca tozu önemli miktarda çinko, demir ve kurşun içerdiğinden tehlikeli atık olarak sınıflandırılmaktadır. EAF baca tozunun hem yüksek miktarda Zn içermesi hem de tehlikeli atık olarak sınıflandırılmasından dolayı son yıllarda EAF baca tozundan Zn kazanımı ile ilgili çalışmalar yoğunluk kazanmıştır. Bu nedenle son yıllarda EAF baca tozundan çinko kazanımı için hidrometalurjik uygulamalar yoğun bir şekilde araştırılmaktadır. Hidrometalurjik yöntemlerde amaç, asidik veya bazik çözeltiler kullanarak çinkoyu çözeltiye almak ve sonrasında liç çözeltisinden solvent ekstraksiyon veya elektroliz ile Zn’yi kazanmaktır. Bu çalışmanın amacı EAF baca tozundan hidrometalurjik yöntemlerle Zn kazanımı ile ilgili günümüze kadar gerçekleştirilen çalışmaların incelenmesi ve derlenerek sunulmasıdır.

Keywords

Tehlikeli Atık, Elektrik ark fırını, Baca tozları

Supporting Institution

TÜBİTAK

Project Number

118M376

Thanks

Yazarlar, bu makalenin hazırlanmasına temel olan araştırma projesine (Proje No: 118M376) verdiği destekten dolayı Türkiye Bilimsel ve Teknolojik Araştırma Kurumu’na (TÜBİTAK) teşekkür ederler

Recovery of Zinc from Electric Arc Furnace Flue Powders in the Hazardous Waste Class by Using Hydrometallurgical Methods: Current Evaluations

Abstract

While iron ore is used as the primary raw material source in steel production; The secondary raw material source is steel scraps. 80% of steel production in our country is carried out in Electric Arc Furnaces (EAF), where steel scraps are used as raw materials. During steel production at EAF, 14-20 kg of flue dust containing 25-45% Zn is generated per 1 ton of steel, depending on the scrap composition. The flue dust formed is classified as hazardous waste because it contains significant amounts of zinc, iron and lead. Due to the fact that EAF flue dust contains both high amounts of Zn and is classified as hazardous waste, studies on Zn recovery from EAF flue dust have intensified in recent years. For this reason, hydrometallurgical applications for zinc recovery from EAF flue dust have been extensively investigated in recent years. In hydrometallurgical methods, the purpose is to take zinc into solution using acidic or basic solutions and then to gain Zn from the leach solution by solvent extraction or electrolysis. The aim of this study is to examine and compile the studies on Zn recovery from EAF flue dust by hydrometallurgical methods.

Keywords

EAF baca tozu, geri kazanım, çinko

Project Number

118M376

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