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有色金属工程:2024,(5)
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两矿法氧化难处理金矿中黄铁矿的研究
(1.中国科学院过程工程研究所;2.中信重工工程技术有限责任公司;3.北方矿业有限责任公司;4.生物浸出)
The Pre-Oxidation of Pyrite in Refractory Gold Ore Using MnO2 as a Oxidant
TAN Qiaoyi1, GUO Wei2,3, GAO Liqiang4, JIA Xianbing5, JIA Yan5, SUN Heyun5, NIU Xiaopeng5, ZHAO Haiping4, RUAN Renman5
(1.Institute of Process Engineering, Chinese Academy of Sciences;2.CITICHIC Engineering &3.Technology Co., Ltd;4.Norin Mining Limited;5.Institute of Process Engineering,Chinese Academy of Sciences)
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投稿时间:2023-10-11    修订日期:2023-10-27
中文摘要: 本文对黄铁矿-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FeS2:MnO2=1:5,反应温度90℃,液固比6:1,初始硫酸浓度100g/L,液固比=6:1,预氧化时间为12h,锰的浸出率达到96.3%。此时,黄铁矿的氧化率达到90.5%,预氧化渣氰化处理后金浸出率达到88.3%。
中文关键词: 难处理金矿  预氧化  黄铁矿  二氧化锰
Abstract:The paper focused on the acid leaching technology of pyrite and pyrolusite, leaching parameters like H2SO4 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 flotation gold concentrate from a refractory gold mine in Gansu Province was carried out. The results displayed that under the parameters of mass ratio of pyrite and pyrolusite is 0.2, H2SO4 concentration is 100g/L, liquid to solid ratio is 6, reaction temperature is 90℃, and the leaching time is 12 h, 96.3% Mn extraction rate was achieved. Meanwhile, the oxidation rate of pyrite can reach 90.5%, and obtain a 88.3% gold leaching rate after cyanidation of pre-oxidized residue.
文章编号:YSJSGC20230589     中图分类号:    文献标志码:
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谭巧义,郭威,高立强,贾先兵,贾炎,孙和云,牛晓鹏,赵海平,阮仁满.两矿法氧化难处理金矿中黄铁矿的研究[J].有色金属工程,2024,(5):.

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