Bioleaching of gold pyrite tailings with adapted bacteria

Autor:	M. El-Zeky, Y.A. Attia
Rok vydání:	1989
Předmět:	chemistry.chemical_classification Gold cyanidation Sulfide Chemistry Metallurgy Metals and Alloys Precious metal engineering.material Tailings Industrial and Manufacturing Engineering Bioleaching Materials Chemistry engineering Pyrite Froth flotation Gold extraction
Zdroj:	Hydrometallurgy. 22:291-300
ISSN:	0304-386X
DOI:	10.1016/0304-386x(89)90026-1
Popis:	Auriferous sulfide ores often contain very finely disseminated gold and other precious metal particles inside the sulfide crystals. The encapsulation of precious metal particles gives rise to the refractory nature of such ores to current extraction methods. As a result, these fractions are frequently lost in the tailings. This work investigates the feasibility of pre-treating these refractory tailings with bioleaching before using standard extraction techniques such as cyanidation. Leadville gold ore tailings containing auriferous pyrite were first concentrated by froth flotation. The pyrite concentrate was treated for different periods of time with 12-weeks-adapted Thiobacillus ferrooxidans before cyanide leaching. The bioleaching of the concentrate before cyanide leaching increased the gold extraction from 32 to 95% and that of silver from 48 to > 98%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1701848e67bf154c5d3e43b985791319 https://doi.org/10.1016/0304-386x(89)90026-1 Zobrazit plný text záznamu