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细粒层对浸矿表面形貌及钝化的影响

尹升华 王雷鸣 潘晨阳 陈勋

尹升华, 王雷鸣, 潘晨阳, 陈勋. 细粒层对浸矿表面形貌及钝化的影响[J]. 工程科学学报, 2018, 40(8): 910-917. doi: 10.13374/j.issn2095-9389.2018.08.003
引用本文: 尹升华, 王雷鸣, 潘晨阳, 陈勋. 细粒层对浸矿表面形貌及钝化的影响[J]. 工程科学学报, 2018, 40(8): 910-917. doi: 10.13374/j.issn2095-9389.2018.08.003
YIN Sheng-hua, WANG Lei-ming, PAN Chen-yang, CHEN Xun. Effect of fine interlayers on surface morphology and passivation during leaching[J]. Chinese Journal of Engineering, 2018, 40(8): 910-917. doi: 10.13374/j.issn2095-9389.2018.08.003
Citation: YIN Sheng-hua, WANG Lei-ming, PAN Chen-yang, CHEN Xun. Effect of fine interlayers on surface morphology and passivation during leaching[J]. Chinese Journal of Engineering, 2018, 40(8): 910-917. doi: 10.13374/j.issn2095-9389.2018.08.003

细粒层对浸矿表面形貌及钝化的影响

doi: 10.13374/j.issn2095-9389.2018.08.003
基金项目: 

国家优秀青年科学基金资助项目(51722401);国家自然科学基金重点资助项目(51734001)

详细信息
  • 中图分类号: TD862

Effect of fine interlayers on surface morphology and passivation during leaching

  • 摘要: 由于矿石粒径配比、表面粗糙度、密度等性质差异,筑堆过程中堆内极易出现矿石颗粒偏析现象.细粒层是导致矿石表面受侵蚀程度不均的关键因素,其严重制约了铜矿资源的高效浸取.为探究细粒层对矿石浸出效果、表面形貌及钝化现象的影响,选取粗颗粒矿石(4 mm < d < 6 mm)与细颗粒矿石(2 mm < d < 4 mm),开展不同细粒层位置下次生硫化铜矿微生物浸出实验.结合CT扫描与冷场电镜扫描技术等分析手段,从宏、细、微观多层面,探究不同细粒层位置下矿石宏观浸出规律,细观矿石团聚结块,微观表面形貌特征与钝化.结果表明:细粒层导致铜浸出率普遍降低,均低于无细粒层、均匀粗颗粒介质的实验组;不同矿堆位置处细粒层对浸出效果影响不同,细粒层位于顶部的实验组铜浸出效果最优,浸矿60 d铜浸出率达71.3%;同一细粒层不同位置处矿石表面孔裂结构演化程度不一;浸矿60 d后,铜浸出率趋于峰值,矿石团聚结块与钝化现象显著,矿石表面形成以黄钾铁矾、多硫化物、胞外多聚物、硫膜为主的钝化物质层.
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  • 收稿日期:  2017-08-30

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