【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.更多还原

【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-oxidationcyanidation 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.更多还原