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美国黄金公司在内华达州尤里卡西北72公里处的Tonkin Springs金矿正在筹建一个1300吨/日的炭浸选金厂,该选厂采用生物浸出进行预处理,预计今年夏末投产。这是美国第一座采用生物浸出的选金厂。 目前该工程已进入第二阶段,Tonkin Springs的生产能力要扩大到1.5吨/年,建立生物浸出厂将耗资2200万美元,金回收率可达90％,预计黄金生产成本为7.70美元/克(240美元/盎司)。
Gold at the Gold Mine in Tonkin Springs, 72 kilometers northwest of Eureka, Nevada, is constructing a 1,300-tonne-day carbon leach gold plant that is biologically leached for pretreatment and is scheduled to begin production later this summer. This is the first gold plant in the United States that uses bioleaching. At present, the project has entered the second phase, Tonkin Springs production capacity should be expanded to 1.5 tons / year, the establishment of bio-leaching plant will cost 22 million US dollars, the gold recovery rate of up to 90%, estimated gold production costs 7.70 US dollars / $ 240 / oz).