Journals →  Gornyi Zhurnal →  2012 →  #8 →  Back

PROCESSING AND COMPLEX USING OF THE MINERAL RAW MATERIALS
ArticleName Heap biooxidation of goldcontaining ores
ArticleAuthor Emelyanov Yu. E., Shketova L. E., Gudkov S. S., Kopylova N. V., Verkhozina V. A.
ArticleAuthorData

Irkutsk Research Institute of Precious and Rare Metals and Diamonds (Irkutsk, Russia):

Emelyanov Yu. E., Leading Researcher, e-mail: emelyaov@irgiredmet.ru
Shketova L. E., Researcher
Gudkov S. S., Head of Laboratory
Kopylova N. V., Researcher

 

Geochemistry Institute of Siberian Branch of Russian Academy of Sciences (Irkutsk, Russia):

Verkhozina V. A., Leading Researcher

Abstract

Heap biooxidation tests were carried out for refractory ores of three deposits. It was found that the recovery of gold from refractory ores with the usage of heap biooxidation is similar to conventional processes, such as: flotation, vat biooxidation and cyanidation of biooxidation product.
The recovery of gold from the products of heap biooxidation for deposits No. I, No. II and No. III was 76%, 77% and 80%, respectively.
According to the researches, the heap biooxidation depends sufficiently on the ore drilling grade. The ore decomposes during bioleaching. In this case, this process can replace grinding.
A long process time (about a year) is a feature of heap biooxidation.
This process could be used for carbonate ores only if it is combined with an acid-generating process.

keywords Biooxidation, refractoriness of the ores, recovery, oxidation degree, arsenopyrite, pyrite, sorption cyanidation
References

1. Dementev V. E., Druzhina G. Ya., Gudkov S. S. Kuchnoe vyshchelachivanie zolota i serebra (Heap leaching of gold and silver). Irkutsk, 2004, 350 p.
2. Verkhozina V. A., Shketova L. E., Verkhozina E. V. Vestnik IrGTU — Journal of Itkutsk State Technical University, 2012, No. 4 (63), pp. 48–53.
3. Polkin S. I., Adamov E. V., Panin V. V. Tekhnologiya bakterialnogo vyshchelachivaniya tsvetnykh i redkikh metallov (Technology of bacterial leaching of nonferrous and rare metals). Moscow, 1982, 288 p.
4. Lodeyshchikov V. V. Sostoyanie issledovaniy i prakticheskikh razrabotok v oblasti biogidrometallurgicheskoy pererabotki upornykh zolotosoderzhashchikh rud i kontsentratov : obzor OAO “Irgiredmet” (Status of research and practical developments in the field biohydrometallurgical processing refractory of gold ores and concentrates : review of JSC “Irgiredmet”). Irkutsk, 1993, 200 p.
5. Karavayko G. I., Kuznetsov S. I., Golomzin A. I. Rol mikroorganizmov v vyshchelachivanii metallov iz rud (Role of microorganisms in the leaching of metals from ores). Moscow, 1972, 248 p.
6. Minglin Wu., Alin Li. Indastrialized heap bioleaching research on the secondary sulpide ore in Yulong copper mine. Biohydrometallurgy: Biotech key to unlock mineral recources value. Proceedings of the 19th International Biohydrometallurgy Symposium. 2011, Vol 2, pp. 760–763.
7. Amankwah R. K., Yen W. T., Ramsay J. A. A two-stage, bacterial pretreatment process for double refractory gold ores. Minerals Engineering. Vol. 18, 2005, pp. 103–108.
8. Bio-leach breakthrough announced. Engineering and Mining Journal. 1994–1995, No. 5, pp. 8.
9. Newmont proves its gold bugs. Mining Magazine. 1994, No. 4, pp. 170–189.

Language of full-text russian
Full content Buy
Back