摘要
开展湿法炼锌浸出渣和锌精矿联合酸浸试验,利用硫酸浸出湿法炼锌常规浸出渣中以铁酸锌等方式存在的锌,同时采用高铁锌精矿将浸出液中的三价铁离子还原为二价铁离子,实现锌精矿中锌的同步浸出。探讨锌浸出渣和锌精矿投料比、初始硫酸浓度、反应时间、液固体积质量比和浸出温度对锌及伴生金属铜、铟和杂质金属铁浸出率的影响。结果表明,在浸出终点浸出液中硫酸浓度20~40g/L、锌浸出渣与锌精矿质量比1∶0.25、原料粒度-0.074mm、液固体积质量比6mL/g、反应温度90℃、反应时间3h的条件下,锌、铟、铜的浸出率都在96%以上,浸出液中95%以上的铁被还原为二价铁离子,满足后续工艺的要求。
Simultaneous acid leaching on neutral residue mixed with zinc concentrate with high-iron sphalerite was tested.Zinc remaining in neutral leaching residue as zinc ferrite and zinc in zinc concentrate were simultaneously leached with sulfuric acid,and ferric iron in solution was reduced to ferrous state by reaction with zinc concentrate.Effects of mass ratio of neutral residue to zinc concentrate,initial concentration of sulfuric acid,reaction time,ratio of liquid to solid,and temperature on leaching efficiency of Zn,In,Cu,and Fe were investigated.The results show that leaching efficiency of Zn,In,and Cu is 96%above,and nearly 95%Fe is Fe 2+in leaching solution suitable for subsequent process under the optimum conditions including concentration of sulfuric acid of leaching terminal point of 20~40 g/L,mass ratio of neutral residue to zinc concentrate of 1∶0.25,particle size of material of-0.074 mm,ratio of liquid to solid of 6 mL/g,reaction temperature of 90℃,and reaction time of 3 h.
作者
黄孟阳
邓志敢
朱北平
魏昶
HUANG Meng-yang;DENG Zhi-gan;ZHU Bei-ping;WEI Chang(Yunnan Energy Research Institute Co.Ltd.,Kunming 650599,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunxi Wenshan Zinc Indium Smelting Co.Ltd.,Wenshan 663701,Yunnan,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2019年第7期1-5,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家重点研发计划(2018YFC1900402)
国家自然科学基金资助项目(51804146,51564030,51664030)
关键词
高铁闪锌矿
锌中浸渣
还原
联合浸出
high-iron sphalerite
zinc neutral leaching residue
reduction
simultaneous leaching
