东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (6): 863-866.DOI: -

• 论著 • 上一篇    下一篇

三种硫化铁单矿物的细菌氧化过程研究

杨丽丽;杨洪英;巩恩普;佟琳琳;   

  1. 东北大学资源与土木工程学院;东北大学材料与冶金学院;东北大学资源与土木工程学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-06-15 发布日期:2013-06-24
  • 通讯作者: Yang, L.-L.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50674029和50274024);;

Study on the bio-oxidation process of three single iron sulfide minerals

Yang, Li-Li (1); Yang, Hong-Ying (2); Gong, En-Pu (1); Tong, Lin-Lin (2)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-06-15 Published:2013-06-24
  • Contact: Yang, L.-L.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

834

摘要： 载金的硫化铁矿物成分主要是黄铁矿,其次是磁黄铁矿和镍黄铁矿.三种单矿物分布在金矿石中的含量不同,细菌氧化周期也随之改变.试验表明,三种矿物氧化过程均产酸,黄铁矿被细菌直接氧化,溶液中细菌浓度较小;磁黄铁矿和镍黄铁矿除受细菌直接氧化,被Fe3+间接氧化也很显著.黄铁矿氧化时间大致是其他两种矿物的3倍,因而工业配矿可酌量降低富含黄铁矿之金精矿用量.本试验通过研究三种单矿物各自的细菌氧化过程,为成分复杂金精矿的细菌浸出工业实践提供了重要理论依据.

关键词: 黄铁矿, 磁黄铁矿, 镍黄铁矿, 细菌氧化, 单矿物

Abstract: There are three iron sulfide minerals involving in gold-bearing ore, which take part in the process of microbial leaching, i.e. pyrite, pyrrhotite and pentlandite in order of gold content. And their bio-oxidation durations are therefore different because of their different distributions in gold-bearing ores. Experimental results showed that all of three minerals produced acidic substance, such as H2SO4. Pyrite is direct oxidized by bacteria and the cell content in solution is less than the other two minerals. Both pyrrhotite and pentlandite are also oxidized by Fe3+ besides direct bio-oxidation. Pyrite is more resistant to oxidation than the other two and its durability for oxidation is 3 times as long as that of the other two under the same conditions. It follows that the pyrite-rich gold concentrate should be less used in industrial applications. The bio-oxidation processes of the three single minerals were individually observed and analyzed, and their results can provide important data for reference to microbial leaching practice of complex gold concentrates.

中图分类号: