CAJ | 학술논문

采用铜萃余液从紫金山低品位次生硫化铜矿石中柱浸铜，研究了溶液pH、温度及铁质量浓度等因素对铜、铁浸出的影响。试验结果表明，生物浸出过程中，铜、铁的浸出行为存在差异，铜先于铁被快速浸出，浸出后期铜浸出率增幅较小，铁浸出率快速升高。推荐的既有利于铜浸出又相对抑制铁浸出的最佳条件为：浸出温度60℃，溶液pH1．6～1．8，铁质量浓度2～5g／L。最佳条件下，铜浸出率达90％以上。也提出了工业生产工艺优化措施。
채용동췌여액종자금산저품위차생류화동광석중주침동，연구료용액pH、온도급철질량농도등인소대동、철침출적영향。시험결과표명，생물침출과정중，동、철적침출행위존재차이，동선우철피쾌속침출，침출후기동침출솔증폭교소，철침출솔쾌속승고。추천적기유리우동침출우상대억제철침출적최가조건위：침출온도60℃，용액pH1．6～1．8，철질량농도2～5g／L。최가조건하，동침출솔체90％이상。야제출료공업생산공예우화조시。
Column bio‐leaching of low‐grade sulfide core from Zijinshan copper mine using copper raffinate as lixiviant was studied .The influences of pH ,temperature and iron concentration on leaching of copper and dissolution of iron w ere examined .T he results show that copper is preferentially leached compared with iron .It was observed that leaching of copper increase rapidly at leaching initial stage . Under the condition of 60 ℃ ,pH of 1 .6-1 .8 ,iron concentrations of 2-5 g/L ,copper leaching reaches 90% and leaching of iron is controlled through precipitating Fe(Ⅲ) as jarosite .