低品位焙烧氰化尾渣物相研究与综合利用  

Phase Study and Comprehensive Utilization of Low Grade Roasted Cyanide Tailings

作　　者：孙留根 蒋开喜 谢锋 张正阳 汤集刚 米建国 侯剑峰 白云龙 韩路洋 SUN Liu-gen;JIANG Kai-xi;XIE Feng;ZHANG Zheng-yang;TANG Ji-gang;MI Jian-guo;HOU Jian-feng;BAI Yun-long;HAN Lu-yang(School of Metallurgy,Northeastern University,Shenyang 110819,China;BGRIMM Technology Group,Beijing 100160,China;Zijin College of Geology and Mining,Fuzhou University,Fuzhou 350108,China;Department of Chemistry and Chemical Engineering,Lvliang University,Lvliang 033001,Shanxi,China)

机构地区：[1]东北大学冶金学院,沈阳110819 [2]矿冶科技集团有限公司,北京100160 [3]福州大学紫金地质与矿业学院,福州350108 [4]吕梁学院化学化工系,山西吕梁033001

出　　处：《有色金属（冶炼部分）》2023年第8期104-111,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：中央高校基本科研业务费资助项目(N182506003);矿冶科技集团有限公司基金资助项目(04-2230)。

摘　　要：氰化尾渣具有产生量大、回收利用难、危害性大、回收价值高等综合性特点,不同来源的氰化尾渣具有不同的元素赋存状态,因此需要采用不同的处理技术。探究了焙烧氰化尾渣的物相组成,水不溶相主要为铁的氧化物、氧化不完全的硫化物和部分硫化物形成的复合锍粒;水溶相为含量约7%的钠-钙的硫酸盐。研究了金铁溶解相关性,发现尾渣中的多孔赤铁矿结构包裹了金,王水溶出过程中,金铁浸出率具有基本相似的趋势,因此,采用还原焙烧-氰化处理方案,在焦炭用量7%、焙烧温度650℃、焙烧时间2 h,浸出矿浆浓度25%,矿浆pH为10.5,氰化钠浓度8‰,浸出时间24 h的条件下,金的渣计浸出率为76.43%。Cyanide tailings have the characteristics of large production,difficult recovery and reuse,high hazard,and high value of recovery.Different sources of cyanide tailings have different elemental states,so different processing technologies are required.The phase composition of roasted cyanide tailings was investigated,and it is found that the water-insoluble phase mainly consists complex slag particles formed by iron oxides,incompletely oxidized sulfides,and partial sulfides;the water-soluble phase is a sulfate salt containing about 7%sodium-calcium.The correlation between gold-iron dissolution was studied,and it is found that the porous structure of hematite in the tailings encapsulated gold.During the aqua regia leaching process,the gold-iron leaching rate has a similar trend.Therefore,a reduction-roasting cyanidation process was adopted.Under the conditions of 7%coke consumption,roasting temperature of 650℃,roasting time of 2 h,leaching slurry concentration of 25%,slurry pH value of 10.5,sodium cyanide concentration of 8‰,and leaching time of 24 h,the residue gold extraction rate is 76.43%.

关 键 词：氰化尾渣 物相结构 赤铁矿 磁铁矿 包裹金 

分 类 号：TF831[冶金工程—有色金属冶金]