摘要
研究了用二甲苯浸出-焙烧-硫酸浸出杂质-氰化浸出银工艺从湿法炼锌渣中回收硫和银。试验结果表明：在反应温度95℃、反应时间15 min、液固体积质量比5∶1条件下用二甲苯浸出，硫浸出率为96．40％；分硫渣中加入1％氢氧化钠，在630℃下焙烧2 h ，然后用硫酸浸出锌、铁等杂质，控制液固体积质量比为4∶1，pH为1．0，反应温度为95℃，反应时间为3h；之后对硫酸浸出渣氰化浸出银，体系pH控制在9．5～11．5之间，液固体积质量比为3∶1，氰化钠质量浓度2．0g/L，浸出时间24h，银回收率为78．5％。
Recovery of silver and sulfur from zinc smelting residue by dimethylbenzene leaching sulfur -roasting-sulfuric acid leaching impurities-cyanide leaching silver process is investigated .T he result show that the leaching rate of sulfur is 96 .40% under the conditions of reaction temperature of 95 ℃ , reaction time of 15 min and the ratio between liquid volume and solid mass of 5 ∶ 1 .The roasting conditions of sulfur leaching residue are adding sodium hydroxide of 1% into the residue ,roasting temperature of 630 ℃ ,roasting time of 2 h .T he conditions of leaching impurities using sulfuric acid are the ratio between of liquid volume and solid mass ,system pH of 1 .0 ,reaction temperature of 95℃ ,reaction time of 3 h .The cyanide leaching silver under the conditions of system pH of 9 .5-11 .5 , the ratio between liquid volume-solid mass of 3∶1 ,sodium cyanide concentration of 2 g/L ,reaction time of 24 h ,the leaching rate of silver is 78 .50% .
出处
《湿法冶金》
CAS
北大核心
2014年第2期121-123,共3页
Hydrometallurgy of China
基金
福建省区域科技重大合作项目(2011H4025)
关键词
二甲苯
湿法炼锌渣
硫
银
回收
dimethylbenzene
zinc smelting residue
sulfur
silver
recovery
作者简介
曾斌（1988-），男，江西赣州人，硕士研究生，主要研究方向为资源综合利用。E—mail：zengbin1101@163．com
