FLOWSHEET DEVELOPMENT STUDIES FOR GOLD AND CLAY CONTAINING SULPHIDE ORES

Year 2019, Volume: 58 Issue: 3, 189 - 196, 01.09.2019

Damla İzerdem Özgür Özcan

https://doi.org/10.30797/madencilik.620665

Abstract

In this study, flowsheet development and economic approach studies have been carried out

for a sulphide ore containing gold and clay. For this purpose, previous beneficiation test results

were used. First, clay separation was performed from the ore. In the following step, direct

leaching, gravity separation and flotation methods were tested and compared to obtain a gold

pre-concentrates at different grinding sizes. According to the test results, 34% of the ore by mass

was separated as clay concentrate, which was suitable for the ceramic industry. Different preconcentrates

were obtained from gravity and bulk sulphide flotation tests. The possible flowsheet

alternatives were compared and discussed. Product specifications were discussed in terms of

economic and environmental aspects. As a result, producing Au containing flotation concentrate

without leaching was decided to be more economical. In this method, 34% of the ore could be

obtained as a by-product. 77.77 g/t gold containing sulphide pre-concentrates can be obtained

with a 70.05 % gold recovery.

Keywords

Gold, Clay, Flotation, Gravity separation, Leaching

ALTIN VE KİL İÇEREN SÜLFÜRLÜ MİNERALLER İÇİN AKIM ŞEMASI GELİŞTİRME ÇALIŞMALARI

Abstract

Bu çalışmada, altın ve kil içeren sülfürlü bir cevher için akım şeması geliştirme ve ekonomik

yaklaşım çalışmaları gerçekleştirilmiştir. Bu amaç için daha önce yürütülen zenginleştirme

çalışmalarının sonuçları kullanılmıştır. İlk olarak cevherden kil ayırma çalışmaları yürütülmüştür.

Bir sonraki adımda ise, altın içeren bir ön konsantre elde edilmesi için farklı öğütme boylarında

doğrudan liç, yerçekimiyle zenginleştirme ve flotasyon yöntemleri test edilmiş ve karşılaştırılmıştır.

Test sonuçlarına göre, cevherin ağırlıkça %34’ü seramik endüstrisinde kullanıma uygun şekilde

kil konsantresi olarak ayrılmıştır. Yerçekimiyle zenginleştirme ve flotasyon testlerinden farklı ön

konsantreler elde edilmiştir. Olası akım şeması alternatifleri karşılaştırılmış ve tartışılmıştır. Ürün

özellikleri ekonomik ve çevresel etkiler açısından tartışılmıştır. Sonuç olarak, liç uygulanmadan

flotasyon ile elde edilen Au konsantresinin daha ekonomik olabileceği kararlaştırılmıştır. Bu

yöntemde cevherin %34’ü yan ürün olarak üretilebilmektedir. 77,77 g/t Au tenörlü bir ön konsantre

%70,05 altın verimi ile elde edilebilmektedir.

Keywords

Gold, Clay, Flotation, Gravity separation, Leaching

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