摘要
应用硫化矿细菌修饰粉末微电极 ,研究镍黄铁矿与黄铁矿混合矿细菌浸出过程的原电池效应。结果表明 ,当镍黄铁矿中加入黄铁矿及C时 ,浸出率有所增加 ,当细菌和黄铁矿综合影响时 ,镍黄铁矿浸出 10d ,Ni浸出率可达 90 %。C及黄铁矿与镍黄铁矿混合时 ,由于接触电位的影响 ,镍黄铁矿氧化反应电流增大、反应起始电位负移 ,反应加剧 ,而黄铁矿的氧化反应受到抑制。据表面EDS能谱分析 ,混合矿浸出后 。
The galvanic effect on the bio leaching process of pyrite and pentlandite mixture is investigated by using the bacteria modified powder micro electrode It is elucidated by the experimental results that the pentlandite leaching rate is increased by the addition of pyrite or carbon, in presence of pyrite and bacteria, the leaching process of pentlandite is enhanced dramatically, the leaching rate of nickel in the pentlandite is up to 90% by 10 days reaction, but the pyrite oxidation reaction is restrained It is demonstrated by the CV curve that when there are pyrite and carbon, the potential of oxidation reaction is decreased, the current of oxidation peak of pentlandite and the reaction rate are increased The oxidation of relatively low rest potential minerals in bio leaching is strengthened by the galvanic effect of sulfide mixture by the EDS analysis
出处
《有色金属》
CSCD
2002年第4期47-50,55,共5页
Nonferrous Metals
基金
国家自然科学基金资助项目 (5 0 2 0 40 0 1)
