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首页> 外文期刊>Hydrometallurgy >Optimization of copper and zinc extractions from polymetallic bulk concentrate and ferric iron bioregeneration under metallic stress
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Optimization of copper and zinc extractions from polymetallic bulk concentrate and ferric iron bioregeneration under metallic stress

机译：金属应力下多金属散装精矿中铜和锌的提取及铁的生物再生的优化

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摘要

Polyphasic optimisation process for ferric iron mediated metal extraction with 50 mL system on COD digester showed 60% copper and 56% zinc extractions in only 30 and 90 min of contact time respectively. Optimum conditions were 90 °C reaction temperature, 10% (w/v) pulp density, pH 1.8 and 1.5% (w/v) Fe~(3+) concentration. The system was scaled up successfully to 5000 mL and as high as 80.81% copper and 54.0% zinc extractions were obtained in 30 and 90 min respectively without addition of any catalyst. The bioregeneration of Fe~(3+) iron from the leachate in shake flask study by developed iron oxidising consortium showed IOR of 396 mg/L/h in the presence of as high as 124.8,21.0,2.8 and 26.7 g/L total dissolved solids, total iron, copper and zinc respectively. The developed biofilm in down-flow packed bed column having UHMWPE plastic material as support matrix showed 3100 mg/L/h IOR, which is eight fold higher as compared to the best IOR obtained in shake flask study.
机译：在COD消解器上用50 mL系统进行的铁铁介导金属萃取的多相优化过程显示，仅在30分钟和90分钟的接触时间内分别萃取了60％的铜和56％的锌。最佳条件为90°C反应温度，10％（w / v）的纸浆密度，pH 1.8和1.5％（w / v）的Fe〜（3+）浓度。该系统成功扩大规模至5000 mL，在不添加任何催化剂的情况下，分别在30和90分钟内分别获得了80.81％的铜和54.0％的锌提取物。发达的铁氧化财团对摇瓶中渗滤液中Fe〜（3+）铁的生物再生研究表明，在总溶解度高达124.8、21.0、2.8和26.7 g / L的情况下，IOR为396 mg / L / h固体，总铁，铜和锌。在以UHMWPE塑料材料为支撑基质的下流式填充床色谱柱中开发的生物膜显示出3100 mg / L / h的IOR，这比摇瓶研究中获得的最佳IOR高出八倍。

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