两矿法氧化难处理金矿中的黄铁矿  

Pre-oxidation of Pyrite in Refractory Gold Ore Using MnO_(2)as Oxidant

作　　者：郭威 谭巧义[1] 高立强 贾先兵 贾炎[1] 孙和云[1] 牛晓鹏 赵海平 阮仁满[1] GUO Wei;TAN Qiaoyi;GAO Liqiang;JIA Xianbing;JIA Yan;SUN Heyun;NIU Xiaopeng;ZHAO Haiping;RUAN Renman(National Engineering Research Center of Green Recycling for Strategic Metal Resources,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Luoyang Mining Machinery Engineering Design Institute Co.,Ltd.,Luoyang 471039,China;Norin Mining Limited,Beijing 100053,China;Management Committee of Zhongguancun Science Park's Xicheng Park,Postdoctoral Programme,Norin Mining Limited Branch,Beijing 100053,China)

机构地区：[1]中国科学院过程工程研究所战略金属资源绿色循环利用国家工程研究中心,北京100190 [2]洛阳矿山机械工程设计研究院有限责任公司,河南洛阳471039 [3]北方矿业有限责任公司,北京100053 [4]中关村科技园区西城园管理委员会,博士后科研工作站,北方矿业有限责任公司分站,北京100053

出　　处：《有色金属工程》2024年第5期73-80,共8页Nonferrous Metals Engineering

摘　　要：对黄铁矿-软锰矿两矿法酸性浸出工艺进行了研究,考察了硫酸浓度、配矿比、反应时间、液固比、反应温度等因素对浸出率的影响,确定了单矿物最适宜的浸出条件,并在此基础上开展了甘肃某地难处理金矿的浮选金精矿预氧化-氰化浸出试验研究。结果表明,当配矿质量比FeS_(2)∶MnO_(2)=1∶6,反应温度90℃,液固比6∶1,初始硫酸浓度100 g/L,预氧化时间为12 h时,锰的浸出率达到76.0%。此时,黄铁矿的氧化率达到88.2%,预氧化渣氰化处理后金浸出率达到85.4%。The paper focused on the acid leaching technology of pyrite and pyrolusite,leaching parameters like H_(2)SO_(4) concentration,mass ratio of pyrite and pyrolusite,reaction time,liquid to solid ratio,and reaction temperature were investigated,and the most suitable leaching condition was determined.On this basis,the experimental study on pre-oxidation-cyanide leaching of the flotation gold concentrate from a refractory gold mine in Gansu province was carried out.The results showed that under the parameters of mass ratio of pyrite and pyrolusite was 1∶6,H_(2)SO_(4) concentration was 100 g/L,liquid to solid ratio was 6,reaction temperature was 90℃,and the leaching time was 12 h,Mn extraction rate of 76.0%was achieved.Meanwhile,the oxidation rate of pyrite can reach 88.2%,and 85.4%gold leaching rate was obtained after cyanidation of pre-oxidized residue.

关 键 词：难处理金矿 预氧化 黄铁矿 二氧化锰 

分 类 号：TF831[冶金工程—有色金属冶金]