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卡林型金精矿加压氧化—铁矾分解—非氰提金研究
- 作者：
- 陈汝璨|张磊|郭学益|田庆华|李栋|衷水平
- 作者单位：
- 中南大学冶金与环境学院|中南大学冶金与环境学院&中国有色金属工业协会中国清洁冶金工程研究中心|中南大学冶金与环境学院&中国有色金属工业协会中国清洁冶金工程研究中心|中南大学冶金与环境学院&中国有色金属工业协会中国清洁冶金工程研究中心|中南大学冶金与环境学院&中国有色金属工业协会中国清洁冶金工程研究中心|福州大学紫金地质与矿业学院
基金项目：
- 博士后创新人才支持计划（BX20230438）；湖南省环保厅环境保护科研课题（HBKYXM-2023022）
详细信息：
- 作者简介：
- 陈汝璨（2000—），男，硕士研究生，研究方向为金清洁提取；E-mail：chen_rc@csu.edu
- 通讯作者：
- 张磊（1991—），男，博士，研究方向为金清洁提取及含砷固废无害化处理；E-mail:zhang_lei@csu.edu.cn
- PDF下载
Research on pressure oxidation-iron alum decomposition-non-cyanide gold extraction of Carlin-type gold concentrate
- English Author：
- School of Metallurgy and Environment,Central South University|School of Metallurgy and Environment,Central South University&China Clean Metallurgy Engineering Research Center,China Nonferrous Metals Industry Association|School of Metallurgy and Environment,Central South University&China Clean Metallurgy Engineering Research Center,China Nonferrous Metals Industry Association|School of Metallurgy and Environment,Central South University&China Clean Metallurgy Engineering Research Center,China Nonferrous Metals Industry Association|School of Metallurgy and Environment,Central South University&China Clean Metallurgy Engineering Research Center,China Nonferrous Metals Industry Association|Zijin School of Geology and Mining,Fuzhou University
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
某卡林型金精矿为典型难处理金精矿，绝大部分金被黄铁矿和砷黄铁矿包裹，直接浸出时金浸出率仅为7.8 %。针对卡林型金精矿提金困难、氰化提金污染严重等问题，创新性提出了加压氧化—铁矾分解—非氰提金方法。卡林型金精矿经加压氧化预处理和铁矾分解处理可实现包裹金的高效解离，氧压渣和破矾渣在反应时间2 h、活性炭用量50 g/L、搅拌速度400 r/min、温度30 ℃、pH值1.3~1.5、空气流量2 L/min、液固比4∶1、硫脲用量4 g/L条件下，金浸出率分别为76.2 %和86.1 %，实现了卡林型金精矿的高效、清洁提取。
关键词:
卡林型金精矿；加压氧化；铁矾分解；非氰提金；包裹金
Abstract:
A Carlin-type gold concentrate is a typical refractory gold concentrate,and most of the gold is encapsulated in pyrite and arsenopyrite,with a gold leaching rate of only 7.8 % by direct leaching.In order to address the difficult gold extraction and severe pollution caused by cyanide leaching in Carlin-type gold concentrate,a gold extraction method using pressure oxidation-iron alum decomposition-non-cyanide gold extraction was proposed.The encapsulated gold can be effectively dissociated after pre-treatment by pressure oxidation and iron alum decomposition.The gold leaching rates of oxygen pressure residue and alum destruction slag were 76.2 % and 86.1 %,respectively,under the following conditions:reaction time of 2 h,activated carbon dosage of 50 g/L,stirring speed of 400 r/min,temperature of 30 ℃,pH value of 1.3-1.5,air flow rate of 2 L/min,liquid-solid ratio of 4∶1,and thiourea dosage of 4 g/L.This method realizes efficient and clean extraction of Carlin-type refractory gold concentrate.
Keywords:
Carlin-type gold concentrate;pressure oxidation;iron alum decomposition;non-cyanide gold extraction;encapsulated gold
