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The bacterial pre-oxidation process of arsenic-containing gold concentrates and the bacterial activity under different chloride
ion concentrations were studied by using a mixture of thermophilic strains TCJ domesticated in production. The experimental
result shows that with different samples and leaching systems, the adaptability and Cl− tolerance of bacteria are different, and that appropriate chloride ion concentration is conductive to bacterial oxidation,
while higher chloride ion concentration will inhibit the bacterial activity and affect the pre-oxidation performance. Under
the present production conditions, TCJ can adapt to the changes of water quality in the source of water and its critical chloride
ion tolerance value is 2.7 g/L. 相似文献
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高砷难处理金精矿细菌氧化-氰化提金 总被引:1,自引:0,他引:1
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一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4.6~2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. 相似文献
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某低品位镍矿石提镍降镁工艺研究 总被引:2,自引:2,他引:0
某低品位镍矿石中有用矿物的镍、铜含量低,MgO含量高,难以产出高品位镍精矿。为此,针对镍铜矿物均以硫化镍、硫化铜状态存在,目的矿物嵌布粒度较细及分布不均匀的特点,通过细磨以及添加调整剂、采用复合捕收剂等手段,成功地获得含镍6.72%、铜3.59%的混合镍精矿,MgO含量降至5.20%。 相似文献
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