摘要
为了研究矿物晶体结构对铜硫化物矿物细菌浸出的影响,进行了硫化铜矿细菌浸出试验,并分析比较了原子键长、晶面间距和键级等参数对铜硫化物矿物微生物浸出的影响。试验结果表明,浸出48天后,久辉铜矿、斑铜矿、铜蓝、黄铜矿中铜浸出率分别是95.12%、84.5%、54.1%和18.33%,不同铜硫化物矿物的细菌浸出规律为:久辉铜矿>斑铜矿>铜蓝>黄铜矿。晶体结构相关参数对比研究表明,久辉铜矿键长最长、晶面间距较大、键级低,故久辉铜矿的键强最弱,容易被细菌氧化浸出。晶体结构是决定不同铜硫化物矿物细菌浸出效率差异的关键因素。
In order to study the effect of mineral crystal structure on copper sulphide bioleaching, bioleaching of copper sulphide minerals was investigated through a comparison of bond length, bond order, and crystalline interplanar spacing. The bioleaching results show that, after 48 days, copper extraction from djurleite, bornite, covellite, and chalcopyrite was 95.12%, 84.5%, 54.1%, and 18.33%, respectively. The rank for bioleaching of copper sulphides shows the order of djurleitebornitecovellitechalcopyrite. Comparison of crystal structure parameters revealed that the highest copper extraction from djurleite is due to its long bond length, large crystal interplanar spacing and low bond strength. The crystal-chemical properties are key factors, which affected the interaction between bacteria and copper sulphides.
出处
《矿物学报》
CAS
CSCD
北大核心
2016年第2期215-219,共5页
Acta Mineralogica Sinica
基金
四川省教育厅科研项目资助课题(16ZA0143)
关键词
硫化铜矿
细菌浸出
键长
晶面间距
键级
copper sulphide
bioleaching
bond length
crystalline interplanar spacing
bond order
