哥伦比亚某含铜金矿石选冶过程优化生产实践  

Production practice of optimized beneficiation and smelting process for a copper-bearing gold ore in Colombia

作　　者：赵军生 沈卫卫 汪鹤鸣 陈庆根 ZHAO Junsheng;SHEN Weiwei;WANG Heming;CHEN Qinggen(Continental Gold Limited Sucursal Colombia,Buritica 999076,Colombia;Zijin Mining Group,Shanghang 364204,China)

机构地区：[1]大陆黄金有限公司哥伦比亚分公司,哥伦比亚布里蒂卡999076 [2]紫金矿业集团,福建上杭364204

出　　处：《中国矿业》2024年第5期232-238,共7页China Mining Magazine

摘　　要：哥伦比亚某黄金矿山以含铜高的金矿石为主,技术改造后金回收率低,氰化钠消耗量大,系统中铜离子不断累积,选冶系统生产异常。通过相关试验研究与生产实践,将铜精矿产率从0.25%调整至0.75%,铜浮选金、铜作业回收率分别从20%、34%提高至35%、52%左右,金总回收率从87%提高至89%。将浸出时间从85.48 h减少至56.61 h,氰化钠浓度从1000 mg/L降低至600 mg/L左右,氰化钠消耗量从7.49 kg/t降低至3.60 kg/t,铜浸出率由27.18%降低至20.09%。根据双氧水破氰除铜试验研究,生产中通过焦亚硫酸钠、双氧水配合使用,进行高碱条件处理,破氰排矿铜离子含量从330.47mg/L降低至24.55mg/L,系统铜离子大幅降低。生产实践结果表明:对于哥伦比亚某含铜金矿石采用提高铜浮选回收率,优化浸出条件降低氰化钠消耗,进行双氧水破氰,高碱除铜可以取得较好的生产效果,对同类型的含铜金矿石选冶工艺优化及生产实践具有指导意义。A gold mine in Colombia is mainly composed of gold ores with high copper content.After technical transformation,the recovery rate of gold is low,the consumption of sodium cyanide is high,and the copper ions in the system are continuously accumulated,resulting in abnormal production of the processing system.Through relevant experimental research and production practice,the yield of copper concentrate is adjusted from 0.25%to 0.75%,the recovery of gold and copper in copper flotation is increased from 20%and 34%to 35%and 52%respectively,and the total recovery of gold is increased from 87%to 89%.The leaching time is reduced from 85.48 h to 56.61 h,the concentration of sodium cyanide is reduced from 1000 mg/L to 600 mg/L,the consumption of sodium cyanide is reduced from 7.49 kg/t to 3.60 kg/t,and the copper leaching rate is decreased from 27.18%to 20.09%.According to the experimental study on cyanide breaking and copper removal with hydrogen peroxide solution,sodium metabisulfite and hydrogen peroxide solution are used together in the production,and then the treatment is carried out under the condition of high alkali.The copper ion content of cyanide breaking and ore discharging is reduced from 330.47 mg/L to 24.55 mg/L,and the copper ion content of the system is greatly reduced.The production practice results show that for a certain copper-bearing gold ore in Colombia,better production results can be achieved by improving the copper flotation recovery,optimizing the leaching conditions to reduce the consumption of sodium cyanide,using hydrogen peroxide solution to break the cyanide,and removing copper with high alkali,which has guiding significance for the same type of copper-bearing gold ore mineral and metallurgical processes optimization and production practice.

关 键 词：含铜金矿石 金精矿 浸出 双氧水破氰 铜离子 

分 类 号：TD95[矿业工程—选矿]