mining Bilimsel Madencilik Dergisi 2564-7024 2587-2613 Chamber of Mining Engineers of Turkey 10.30797/madencilik.537646 LİÇ ATIKLARINDAN SİYANÜRÜN GERİ KAZANIMI YÖNTEMLERİ https://orcid.org/0000-0001-8789-0007 Yılmaz Elif https://orcid.org/0000-0002-8711-0784 Yazıcı Ersin Y. https://orcid.org/0000-0001-9024-4196 Celep Oktay https://orcid.org/0000-0003-4105-0912 Deveci Hacı 03 01 2019 58 1 53 71 07 12 2018 03 11 2019 Copyright © 1960, Bilimsel Madencilik Dergisi 1960 Bilimsel Madencilik Dergisi

liçidir. Cevherde bulunan bakır, çinko vb. minerallerinin de siyanür liçinde çözünmesi siyanürtüketimini artırmakta ve altın kazanımını olumsuz yönde etkilemektedir. Çözünen bu metaller, liçsonrası çözelti saflaştırma ve metal kazanımı süreçlerinde de teknik sorunlara neden olmaktadır.Siyanür liçi sonucunda, serbest siyanür ve metal-siyanür komplekslerini içeren atık çözelti (palp)açığa çıkmaktadır. Bu atıklar, kimyasal bozundurma (INCO SO2/Hava, H2O2 gibi) veya siyanürgeri kazanım proseslerine tabi tutularak siyanür içeriklerinin yasal olarak belirlenen sınırların(CN WAD<10 mg/L) altına indirilmesi gerekmektedir. Siyanürün geri kazanımı ile siyanür derişiminingerekli seviyeye indirilmesinin yanı sıra reaktif maliyetleri de azaltılabilir. Bu amaçla, aktif karbonadsorpsiyonu, iyon değişimi (IX), solvent ekstraksiyonu (SX), elektro-kazanım, asitleştirmeabsorpsiyontemelli prosesler (AVR, Cyanisorb) ve SART gibi farklı siyanür geri kazanım yöntemlerigeliştirilmiştir. Endüstriyel siyanür geri kazanım teknikleri (AVR, SART vd.) ile siyanür tüketimi%50-75 azaltılabilmektedir. Fakat bu proseslerin tesiste uygulanması sırasında çeşitli problemlerlekarşılaşılmaktadır. Bu nedenle, yeni ve daha etkin yöntemlerin geliştirilmesine ihtiyaç duyulmaktadır.Bu çalışmada, siyanür geri kazanımı için geliştirilen bu yöntemlerin/proseslerin teknik özellikleri,birbirine göre olumlu ve olumsuz yanları detaylı olarak tartışılmıştır.

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