SİİRT-MADENKÖY BAKIR CEVHERİNİN FLOTASYON YÖNTEMİYLE ZENGİNLEŞTİRİLMESİ

Bu araştırmada Siirt-Madenköy’den alınan temsili bakır numunesi üzerinde flotasyon deneyleri yapılmıştır. Deneysel çalışmalara esas olan cevher numunesinin kesitleri üzerinde yapılan mikroskobik incelemeler sonucu, cevher bileşiminde; pirit, kalkopirit, sfalerit, galen, hematit, limonit, kalsit ve kuvars minerallerinin bulunduğu tespit edilmiştir. Flotasyon deneylerinde, % 20 bakır içerikli konsantrelerin elde edilmesinin yanı sıra, elde edilen bu konsantrelerin çinko içeriğinin % 4’ün altına düşürülmesi hedeflenmiştir. Bu amaca yönelik olarak, toplayıcı cinsi, miktarı, pH, öğütme boyutu ve çeşitli bastırıcıların flotasyon üzerindeki etkisi araştırılmıştır. Flotasyon deneylerinde kollektör olarak Aerophine 3418 A (Sodyum izobutil dithiofosfin), KEX (Potasyum Etil Ksantat), Aerofloat 211 (Sodyum izopropildithifosfat), köpürtücü olarak ise MIBC (Metil izobütil karbinol) kullanılmıştır. Bastırıcı olarak kostik nişasta, sodyum meta bisülfit, sodyum silikat ve çinko sülfatın etkisi araştırılmıştır. Sonuç olarak, toplayıcı cinsi, miktarı ve öğütme boyutunun zenginleştirmeye olan etkisinde, çalışmanın amacına en uygun toplayıcının 50 g/ton miktarında dithifosfin kökenli Aerophine 3418 A olduğu belirlenmiştir. Malzemenin % 87’sinin 53 µm tane boyutunun altında olduğu öğütme koşullarında yapılan flotasyon deneyleri ile en iyi sonuçlar alınmıştır. Sodyum meta bisülfitin bakır konsantresi içindeki çinkonun bastırılması için en etkin reaktif olduğu belirlenmiştir

BENEFICATION OF SİİRT-MADENKÖY COPPER ORE BY FLOTATION METHOD

Copper ore sample collected from Siirt-Madenköy, was used in experimental studies. The results of microscopic analysis on the samples used in tests showed that the ore contains pyrite, chalcopyrite, sphalerite, galena, hematite, limonite, calcite and quartz. In the Siirt-Madenköy copper plant Aerophine 3418 A (50 g/ton) is used as collector, as well as zinc sulphate (120 g/ton) and sodium silicate (1000 g/ton) as depressants. In this study, collector type and dosages were investigated. A series of flotation tests were accomplished for obtaining concentrates assaying 20 % copper as well as decreasing the zinc content of concentrate below 4 %. Therefore, the effects of collector type, collector dosages, pH and particle size were investigated. In flotation tests, Aerophine 3418A (Sodium Isobutyl Dithiophosphine), KEX (Potassium Ethyl Xanthate) and Aerofloat 211 (Sodium Isopropyl Dithiophosphate) were used as collector and MIBC (Methyl Iso Butyl Carbinol) were used as frother. The effects of depressants caustified starch, sodium meta bisulphite, sodium silicate, zinc sulphate were investigated. As a result of flotation experiments, the best collector type is Aero 3418 A , optimum collector dosage is 50 g/t, and the optimum particle size is below 53 µm. Aerophine 3418 A provides acceptable recoveries and metal contents at pH 12 for copper. Sodium meta bisulphite is more effective depressant compared to zinc sulphate to depress zinc in copper concentrate. When 4000 g/ton meta bi sulphite is used as a depressant, a copper concentrated is produced with 71% recovery and 17.93 % Cu content where zinc content decreases to 3.39 %. These results could be adapted to plant where zinc sulphate is used to depress zinc, sodium silicate to depress gangue minerals. Alternatively, meta bisulphite could be used in the plant for the depression of zinc

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