摘要
通过在高砷金精矿中配入不同比例的低砷碳酸盐型金精矿,使其所含硫、砷及铁等主要矿物成分含量发生变化,研究给矿中铁砷摩尔比对难处理高砷金精矿细菌氧化-氰化浸出效果的影响。结果表明：含砷金精矿中铁砷摩尔比直接影响细菌预氧化的效果,同时也影响细菌的活性和溶液中铁砷摩尔比的变化,给矿中铁砷摩尔比越高,溶液中的铁砷摩尔比也越高,且随着给矿中铁砷摩尔比的增加,溶液中铁砷摩尔比的变化幅度加大,给矿中铁砷摩尔比介于4.6~5.2之间,有利于细菌预氧化和氰化浸出,铁、砷氧化率分别由6.14%和7.38%提高到89.90%和93.60%,金、银浸出率分别由64.18%和35.93%提高到97.78%和88.83%,较好地改善细菌氧化效果,稳定和优化细菌预氧化过程。
Through blending low arsenic carbonate gold concentrate with different ratios into high arsenic-containing gold concentrate and changing the content of major ores,such as sulfur,arsenic and iron,the effect of iron-arsenic molar ratio on the bacteria oxidating-cyaniding extraction from high arsenic-containing refractory gold concentrate was investigated.The result shows that the iron-arsenic mole ratio of arsenic-containing gold concentrate has direct effect on the bacteria oxidation,bacteria activity and iron-arsenic molar ratio in solution.High iron-arsenic mole ratio in feeding results in high iron-arsenic ratio in solution.With iron-arsenic molar ratio increasing,the iron-arsenic ratio increases,and the frequency of change accelerates.The iron-arsenic ratio ranging from 4.6 to 5.2 is helpful to bacteria oxidizing-cyaniding extraction,the oxidation ratios of iron and arsenic increase to 89.90% and 93.60% from 6.14% and 7.38%,respectively.The extraction rate of gold and silver increase to 97.78% and 88.83% from 64.18% and 35.93%,respectively.Choosing appropriate iron-arsenic molar ratio can effectively improve the bacterial oxidation,stabilizes and optimize the process of bacterial pre-oxidation.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2011年第5期1151-1158,共8页
The Chinese Journal of Nonferrous Metals
基金
国家重点基础研究发展计划资助项目(2010CB630905)
关键词
高砷难处理金精矿
细菌氧化
氰化提金
high arsenic refractory gold concentrate
bacterial oxidation
cyaniding gold extraction
作者简介
通信作者：杨玮，高级工程师，博士；电话：13507710579；E-mail：ywmsco@126．com
