东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (4): 426-429.DOI: -

• 论著 • 上一篇    下一篇

嗜热菌对高砷金精矿氧化-氰化提金试验研究

杨洪英;巩恩普;訾建威;杨立;   

  1. 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;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:2013-06-23 修回日期:2013-06-23 出版日期:2006-04-15 发布日期:2013-06-23
  • 通讯作者: Yang, H.-Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(5007401550274024);;

Experimental investigation on gold recovery from high-As concentration through bio-oxidation/cyanidation with thermophilic bacteria

Yang, Hong-Ying (1); Gong, En-Pu (2); Zi, Jian-Wei (1); Yang, Li (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-04-15 Published:2013-06-23
  • Contact: Yang, H.-Y.
  • About author:-
  • Supported by:
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摘要： HQ-0211嗜热菌是一种良好的浸矿菌种,具有良好的耐砷性能,适合处理高砷金精矿.采用HQ-0211嗜热菌对含砷质量分数为11.78%金精矿进行氧化6 d后,金精矿含砷质量分数下降到0.20%,液体砷质量浓度达到11.41 g/L,脱砷率达到99.24%,失重率63.38%.含砷质量分数为11.78%的金精矿经过嗜热菌的氧化预处理,金的回收率大大提高,从直接氰化的18.25%提高到92.12%.试验表明含砷11.78%金精矿的细菌氧化-氰化试验取得了很好的工艺技术指标,不需要配矿降砷,该菌氧化时间短,脱砷、脱硫效果良好.

关键词: 嗜热菌, 高砷金精矿, 细菌氧化, 脱砷, 氰化, 金回收率

Abstract: HQ-0211 thermophilic bacteria, as an excellent strain for microbial leaching, is highly resistant to arsenic and suitable for the refractory high-As gold concentration. The bacteria was used experimentally to preoxidize the gold concentration in which the As content is 11.78 wt% for 6 days. The As content thus lowers to 0.02 wt% with an As mass concentration 11.41 g/L in solution, dearsenification rate 99.24% and weight loss rate 63.38%. After the preoxidation by HQ-0211, the gold recovery is improved greatly, i.e., up to 92.12% from 18.25% that was simply cyanided. The experimental result showed that the bio-oxidation-cyanidation process is highly adaptable to such gold concentration with high As content, for example, up to 11.78 wt%. In addition, in the process no other additives is required for dearsenification, and the process offers such advantages as short time for bio-oxidation and good effect of desulfurization.

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