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载金炭解吸电解工艺优化及生产实践
- 赵鲁国
- 作者单位：
- 山东招金金银精炼有限公司
基金项目：
- isnull
详细信息：
- 作者简介：
- 赵鲁国(1972—)，男，高级工程师，从事选矿冶炼技术研究和生产管理工作；E-mail：zhaoluguo123@163.com
- 通讯作者：
- isnull
- PDF下载
Optimization of gold-loaded carbon desorption electrolysis process and its production practice
- English Author：
- Shandong Zhaojin Gold & Silver Refinery Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
针对金精矿氰化炭浆提金过程中活性炭吸附残留浮选有机药剂及富集其他杂质元素，导致载金炭解吸电解回收金效果差、贫炭金品位高等问题，开展了载金炭解吸电解工艺优化，并进行了生产实践。结果表明：通过强化源头水洗载金炭，补加氢氧化钠解吸液由2.5 %降低到1.25 %，解吸流量由6 m3/h降低到4.5 m3/h，电压由2.0 V提高到2.5 V，电流由2 400 A提高到2 900 A，在相同解吸电解时间下贫炭金品位由200 g/t以上降至50 g/t以下，金解吸率由74.8 %提升至96.7 %，电解贫液金质量浓度由2.0~4.0 g/m3降至1.0 g/m3以下，极大改善了金精矿氰化炭浆提金工艺载金炭解吸电解效果，提高了金回收率。
关键词:
载金炭；解吸电解；金精矿；氰化炭浆提金；解吸率
Abstract:
In the process of cyanidation-CIP gold extraction from gold concentrate,activated carbon adsorbs residual flotation organic reagents and enriches other impurity elements,leading to poor gold recovery efficiency and high gold grade in lean carbon,among other issues,in gold-loaded carbon desorption electrolysis process.Therefore,optimization of the gold-loaded carbon desorption electrolysis process was conducted,followed by production practices.Results showed that by enhancing the initial water washing of gold-loaded carbon,the addition of supplementing sodium hydroxide desorption solution decreased from 2.5 % to 1.25 %,desorption flow rate decreased from 6 m3/h to 4.5 m3/h,voltage increased from 2.0 V to 2.5 V,current increased from 2 400 A to 2 900 A.Under the same desorption time,the gold grade in lean carbon decreased from above 200 g/t to below 50 g/t,and gold desorption rate increased from 74.8 % to 96.7 %.The concentration of gold in the electrolytic lean solution decreased from 2.0-4.0 g/m3 to below 1.0 g/m3,greatly improving the desorption electrolysis effect of gold-loaded carbon in gold concentrate cyanidation-CIP gold extraction process and enhancing gold recovery rate.
Keywords:
gold-loaded carbon;desorption electrolysis;gold concentrate;cyanidation-CIP gold extraction;desorption rate
