Abstract
Abstract Almost all copper slags contain a considerable amount of Cu (0.5 - 3.7%) close to or even higher than copper ores. A numberof methods for metal recovery from copper slag were reported These methods can be classified into three categories, flotation,leaching and roasting. Sulfide flotation method for the recovery of copper from Kazahstan copper furnace slag is discussed inthis investigation. 50% of copper from the slag was recovered by sulfide flotation at pH 4. meanwhile 67% of copper from theslag was recovered at pH 11. Higher copper recovery result at pH 11 rather than that at pH 4 was caused by the fact that coppersulfides were floated in particle size fraction over 100µm in concentrates at pH 11. When the slag were ground below 74µmby ball milling, the recovery of copper by floation in slag improved to 78 - 83% because of copper liberation effect.Key words : slag, copper slag, flotation, magnetic separation, recovery of copper 1. 서 론 구리제련 슬래그는 광산에서 선광과정을 거쳐 발생한구리정광을 고온에서 녹여 조동(anode)을 생산하는 과정 중, 융제인 규사가 철과 결합하여 발생하는 부산물로 구리가 주성분인 매트(matte)와 분리 배출된다.
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