(1. 東北大學(xué) 冶金學(xué)院，沈陽 110819；
2. 東北大學(xué)(秦皇島分校) 資源與材料學(xué)院，秦皇島 066004；
3. 秦皇島市資源清潔轉(zhuǎn)化與高效利用重點實驗室，秦皇島 066004；
4. 上海大學(xué) 材料科學(xué)與工程學(xué)院，上海 200072)
摘 要: 隨著硫化鎳礦資源的日趨枯竭，銅鎳氧硫混合礦的利用將會愈發(fā)受到關(guān)注。通過對原礦進行差熱-熱重、XRD以及熱力學(xué)分析，揭示焙燒過程礦石礦相的轉(zhuǎn)變歷程，研究銅鎳氧硫混合礦焙燒過程中礦物粒度、焙燒溫度和焙燒時間對銅、鎳、鐵轉(zhuǎn)化的影響，探索浸出過程中溶劑、液固比、浸出溫度及浸出時間對銅、鎳、鐵浸出的影響。結(jié)果表明：礦物粒度為74~80 μm、焙燒溫度為600 ℃、焙燒時間為2 h、選擇水作為浸出溶劑、浸出溫度為60 ℃、液固比為6:1、浸出時間2 h時，鎳和銅的浸出率達到最高分別為46.25%和96.27%，鐵的浸出率低于1%。
關(guān)鍵字: 銅鎳氧硫混合礦；焙燒；浸出；轉(zhuǎn)化
（1. School of Material and Metallurgy, Northeastern University, Shenyang 110819, China;
2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China;
3. Key laboratory of Clean Conversion and Efficient Utilization to Resource in Qinhuangdao, Qinhuangdao 066004, China;
4. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China）
Abstract:With the resource shortage of nickel sulfide ore, the new process is needed to treat the oxide-sulfide mixed copper-nickel mixed ore. DTA-TG and XRD of ore at different roasting temperatures and thermodynamic analysis were used to reveal the phase transition at the roasting stage. The influences of mineral particle size, roasting temperature and roasting time on the element transformation of copper, nickel and iron were studied at the roasting process of oxide-sulfide mixed copper-nickel ore. The influences of different leaching solvents, liquid-solid ratio, leaching temperature and leaching time on the leaching of copper, nickel and iron were studied during leaching process. The results show that when the particle size of mineral powder is 74-80 μm, the roasting temperature is 600 ℃, roasting time is 2 h, using water as solvent, leaching temperature is 60 ℃, liquid-solid ratio is 6:1 and leaching time is 2 h, the leaching ratios of copper and nickel reach the maximum, 46.25% and 96.27%, respectively.
Key words: oxide-sulfide mixed copper-nickel ore; roasting; leaching; transformation
