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金属矿山 ›› 2013, Vol. 42 ›› Issue (09): 158-162.

• 综合利用 • 上一篇    下一篇

盐酸浸取某铜尾矿中镁的行为研究

冯雅丽1,杨志超1,2,李浩然2,滕青1,王维大1,周宇照1   

  1. 1.北京科技大学土木与环境工程学院;2.中国科学院过程工程研究所生化工程国家重点实验室
  • 出版日期:2013-09-16 发布日期:2013-11-22
  • 基金资助:

    国家自然科学基金项目(编号:21176026,21176242),国家高技术研究发展计划(863计划)项目(编号:2012AA062401),“十二五”国家科技支撑计划项目(编号:2012BAB14B05,2012AA062401),国际海域资源调查与开发专项(编号:DY125-15-T-08)。

Magnesium Leaching Behavior from a Copper Tailing with Hydrochloric Acid

Feng Yali 1,Yang Zhichao 1,2,Li Haoran 2,Teng Qing 1,Wang Weida 1,Zhou Yuzhao 1   

  1. 1.Civil and Environmental Engineering School,University of Science and Technology Beijing;2.State Key Laboratory of Biochemical Engineering Institute of Process Engineering,Chinese Academy of Sciences
  • Online:2013-09-16 Published:2013-11-22

摘要: 为了高效开发利用某高镁铜尾矿中的镁,对其盐酸浸取工艺技术条件进行了研究,并建立了浸出动力学模型。研究结果表明,在盐酸浓度为1 mol/L,反应温度为353 K,液固比为3〖DK(〗∶〖DK)〗1,反应时间为4 h,搅拌速度为300 r/min条件下,镁浸出率可达75.55%;Avrami模型能较好地描述浸出过程。对不同条件下浸渣的XRD、SEM分析表明:当镁浸出率为 75.55% 时,蛇纹石结构基本全部被破坏,因而浸渣中的蛇纹石衍射峰消失;高温高压也仅能使部分钙镁榴石晶体结构不稳定,并与盐酸反应,这就是镁酸浸率难以大幅提高的原因。

关键词: 高镁铜尾矿, 蛇纹石, 盐酸浸出, 动力学模型

Abstract: In order to efficiently develop and utilization of magnesium from high-magnesium copper tailings,technical conditions for the hydrochloric acid leaching process were studied,and the leaching kinetics model was established.The results showed that under conditions of hydrochloric acid 1 mol/L,reaction temperature at 353 K,liquid to solid ratio of 3〖DK(〗∶〖DK)〗1,reaction time 4 h,stirring speed of 300 r/min,the magnesium leaching rate reached 75.55%; Avrami model can better describe the leaching process.XRD,SEM analysis of leaching residue under different conditions showed that:when the magnesium leaching rate is 75%,the serpentine's structure has been completely destroyed,thus diffraction peaks of serpentine in leaching residue disappeared; High temperature and high pressure only makes the crystal structure of some calcium-magnesium garnets unstable and reaction with hydrochloric acid,which is the reason for lowering the leaching rate of magnesium acid.

Key words: High-magnesium copper tailing, Serpentine, Hydrochloric acid leaching, Kinetics model