[含金硫化矿的生物氧化及氰化残渣的后续生物处理]

[Biooxidation of gold-bearing sulfide ore and subsequent biological treatment of cyanidation residues].

作者信息

Kanaev A T, Bulaev A G, Semenchenko G V, Kanaeva Z K, Shilmanova A A

出版信息

Prikl Biokhim Mikrobiol. 2016 Jul-Aug;52(4):392-401.

Abstract

The percolation biooxidation parameters of ore from the Bakyrchik deposit were studied. An investigation of the technological parameters (such as the concentration of leaching agents, irrigation intensity, and pauses at various stages of the leaching) revealed the optimal mode for precious metal extraction. The stages of the ore processing were biooxidation, gold extraction by cyanidation or thiosulfate leaching, and biological destruction of cyanide. The gold and silver recovery rates by cyanidation were 64.0 and 57.3%, respectively. The gold and silver recovery rates by thiosulfate leaching were 64.0 and 57.3%, respectively. Gold and silver recovery rates from unoxidized ore (control experiment) by cyanidation were 20.9 and 26.8%, respectively. Thiosulfate leaching of unoxidized ore allowed the extraction of 38.8 and 24.2% of the gold and silver, respectively. Cyanidation residues were treated with bacteria of the genus Alcaligenes in order to destruct cyanide.

摘要

研究了巴克尔奇克矿床矿石的渗滤生物氧化参数。对工艺参数（如浸出剂浓度、灌溉强度和浸出各阶段的停顿时间）进行调查后，得出了贵金属提取的最佳模式。矿石加工阶段包括生物氧化、氰化或硫代硫酸盐浸出提金以及氰化物的生物破坏。氰化法提金和提银的回收率分别为64.0%和57.3%。硫代硫酸盐浸出法提金和提银的回收率分别为64.0%和57.3%。未经氧化的矿石（对照实验）采用氰化法提金和提银的回收率分别为20.9%和26.8%。未经氧化的矿石采用硫代硫酸盐浸出法分别可提取38.8%的金和24.2%的银。氰化残渣用产碱杆菌属细菌处理以破坏氰化物。