利用高盐水氧化提取高脉石矿物难处理金矿中金  

Gold Extraction from Refractory Gold Ore with High Gangue Contents by Heavy Salt Water

作　　者：伍赠玲[1] 范道焱 王乾坤 林炜 WU Zeng-ling;FAN Dao-yan;WANG Qian-kun;LIN Wei(State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores,Zijin Mining Group Co.,Ltd.,Xiamen 361101,Fujian,China;Norton Gold Fields Ltd.,Kalgoorlie 6430,Australia)

机构地区：[1]紫金矿业集团股份有限公司,低品位难处理金矿资源综合利用国家重点实验室,福建厦门361101 [2]诺顿金田有限公司,澳大利亚卡尔古利6430

出　　处：《有色金属（冶炼部分）》2021年第2期82-86,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2018YFC1801800);国家自然科学基金资助项目(51504071)。

摘　　要：针对矿区所在地的地表水和地下水盐度高、淡化水生产成本高、影响难处理金矿资源的利用问题,采用矿山含氯高盐水,对高碱性脉石难处理金矿进行次氯酸钠氧化—氰化提金试验,考查了次氯酸钠用量、氧化时间、氰化工艺等对金浸出率的影响。次氯酸钠用量94.5kg/t以上氧化处理2~4h后,金浸出率从直接氰化浸出的26.8%升高至88.1%~97.6%,氰化尾渣金品位降至0.07~0.36g/t。Surface water and ground water in the mining area have high salinity and production cost of desalination water is high,which affects utilization of refractory gold resources.Tests on sodium hypochlorite oxidation and cyanidation were conducted for gold extraction from refractory gold ore with high gangue contents by heavy salt water.Effects of NaClO dosage,oxidation time and cyanidation process on gold extraction were investigated.Gold extraction rate rises from 26.8%to 88.1%—97.6%and gold grade of residues drops to 0.07-0.36 g/t after oxidation with sodium hypochlorite of 94.5 kg/t above for2—4 h.

关 键 词：难处理金矿 高盐水 碱性脉石 次氯酸钠 

分 类 号：TF831[冶金工程—有色金属冶金]