金矿预氧化处理过程中砷的转化  

Arsenic Conversion During Pre-Oxidation Treatment of Gold Ores

作　　者：陈国民 杨洪英 陈彦臻 张广积[3] CHEN Guomin;YANG Hongying;CHEN Yanzhen;ZHANG Guangji(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Liaoning Tianli Gold Industry Co.,Ltd.,Dandong 118103,Liaoning,China;CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]辽宁天利金业有限责任公司,辽宁丹东118103 [3]中国科学院过程工程研究所,中国科学院绿色过程与工程重点实验室,北京100190 [4]中国科学院大学化学工程学院,北京100049

出　　处：《黄金科学技术》2023年第5期865-872,共8页Gold Science and Technology

基　　金：国家重点研发计划项目“新型高效冶金生物反应器研制与示范”(编号:2022YFC2105302)资助。

摘　　要：含砷难处理金矿组成复杂,需经过预氧化处理才能进行氰化提金。砷的转化方式和最终形态对含砷难处理金矿的预氧化处理效果有重要的影响。目前难处理金矿的预氧化方法主要有3种,分别是焙烧法、加压氧化法和生物氧化法。围绕砷的转化问题,综述了3种难处理金矿预氧化处理方法的优缺点,并结合我国黄金工业的发展现状和环境保护要求,展望了难处理金矿预氧化处理技术的未来发展方向。The composition of arsenic-bearing refractory gold mine is complex,in which gold is usually encapsulated by arsenopyrite and arsenian pyrite.Arsenic is a poisonous element,which is harmful to human health and has adverse effects on the ecological environment.At the same time,the arsenic-bearing ores can lead to excessive consumption of cyanide and affect cyanide leaching of gold.Therefore,the arsenic-bearing refractory gold ores need to be pre-oxidized before cyanide leaching.The transforming pathway and final form of arsenic have an important effects on the pre-oxidation treatment of arsenic-containing refractory gold ore.At present,there are three pre-oxidation methods for refractory gold ores,namely roasting process,pressure oxidation and bio-oxidation method.Roasting is a proven technology,which can comprehensively recover copper and arsenic,but it is difficult to avoid the release of arsenic in this process.The pressure oxidation is an environment-friendly process that can achieve high gold recovery,but the expensive pressure reactor used in this process will lead to a high capital cost.Bio-oxidation method can obtain a recovery rate close to that of the pressure oxidation method,and the equipment investment cost is much lower than that of the pressure oxidation method.However,the bio-oxidation reaction is slow and a longer residence time is needed.The long residence time and the low efficiency of bio-oxidation treatment,especially the slow oxidation and decomposition rate of low-arsenic minerals,restricts its further development.It may face competition from pressure oxidation in the future.However,if it can be combined with roasting process,it is possible to improve the roasting process with its own environmental advantages in arsenic treatment to form a gold ore treatment technology with both advantages of clean production and efficient treatment.The advantages and existing problems of these preoxidation methods for refractory gold ores were reviewed in this paper with emphasis on the conversion of arsenic

关 键 词：难处理金矿 金矿预氧化 砷的转化 焙烧法 加压氧化法 生物氧化法 

分 类 号：TD953[矿业工程—选矿]