Effect of mechanical activation on thiosulfate leaching of gold from complex sulfide concentrate

来源期刊:中国有色金属学报(英文版)2011年第12期

论文作者:Mohsen HASHEMZADEHFINI Jana FICERIOVA Emad ABKHOSHK Behrouz Karimi SHAHRAKI

文章页码:2744 - 2751

关键词:机械活化;硫代硫酸盐浸取;难处理矿;提金

Key words:mechanical activation; thiosulfate leaching; refractory ore; extraction of gold

摘    要:采用机械活化提高复杂硫化矿CuPbZn中金的回收。研究研磨时间、球尺寸、球料比和球磨转速对金的硫代硫酸盐浸取的影响。在最优条件下(球磨时间1 h,球尺寸20 mm,球料比15/1,球磨速度600 r/min),矿石的非晶化度达到78%,颗粒尺寸从30 μm下降到8 um,比表面积从1.3 m2/g 增加到 4.6 m2/g,金的回收率从7.4%提高到73.26%。

Abstract:

The use of mechanical activation to enhance gold recovery from a CuPbZn complex sulfide concentrate was investigated. The effects of milling time, ball size, sample to ball ratio and milling speed on thiosulfate leaching were studied. Under optimum conditions of milling time 1 h, ball size 20 mm, sample to ball ratio 1/15 and mill speed 600 r/min, nearly 78% of sample is amorphized, particle size decreases from d100=30 μm to d100=8 μm, specific surface area increases from 1.3 m2/g to 4.6 m2/g and gold recovery enhances from 17.4 % in non-activated sample to 73.26 %.

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