摘要
黄铜矿常压浸出存在浸出缓慢等问题。当溶液中存在MnO2时,由于矿物接触间的原电池效应为黄铜矿的氧化提供更多途径,从而为提高黄铜矿浸出率带来可能。分别研究了在H2SO4溶液和H2SO4-Fe2(SO4)3溶液中,MnO2对黄铜矿浸出行为的影响。结果表明,添加MnO2能够促进黄铜矿的浸出,在浸出过程中,MnO2迅速分解。黄铜矿在浸出过程中会形成一种缺金属钝化层,这种钝化层附着在黄铜矿表面,阻碍溶液与黄铜矿的接触,阻碍了黄铜矿的浸出。
A common problem of slow leaching rate exists in atmospheric pressure leaching of chalcopyrite.When MnO2 exists in solution,galvanic interaction between minerals provides a way for oxidation of chalcopyrite,which makes it possible to improve leaching rate of chalcopyrite.Effect of MnO2 on oxidative leaching of chalcopyrite in H2SO4 solution and H2SO4-Fe2(SO4)3 solution was studied respectively.The results show that leaching of chalcopyrite is promoted in presence of MnO2,and MnO2 decomposes rapidly.A metal-deficient passivate layer is formed and wrapped on chalcopyrite surface,which hinder leaching of chalcopyrite.
作者
白云龙
谢锋
王伟
蒋开喜
BAI Yun-long;XIE Feng;WANG Wei;JIANG Kai-xi(School of Metallurgy,Northeastern University,Shenyang 110004,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2019年第11期1-6,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目（51574072,51434001）
关键词
湿法冶金
黄铜矿
二氧化锰
促进作用
hydrometallurgy
chalcopyrite
manganese dioxide
promotion
