摘要
国内从铅锌冶炼烟尘中回收铟多采用硫酸浸出工艺,随着烟尘中锡含量的升高,铟的浸出率呈现下降的规律,在硫酸中铟的浸出率普遍不足60%。针对含有InO·xSnO的复杂铅锌冶炼烟尘,本文提出了一种铅锌冶炼烟灰氯化浸出回收铟的工艺,并考察了氯酸钠浓度、盐酸浓度、浸出温度、硫酸浓度、浸出时间、液固比等因素对铟浸出率的影响。结果显示,在氯酸钠浓度20 g/L、盐酸浓度48 g/L、浸出温度80℃、硫酸浓度225 g/L、浸出时间3.0 h和液固比L/S=5∶1(L/kg)的条件下氯化浸出,铟的平均浸出率达到92.7%。该工艺可用于处理复杂铅锌冶炼烟尘回收铟的生产实践。
In China, sulfuric acid leaching process is widely used to recover indium from lead and zinc smelting dust. With the increase of tin content in the dust, the leaching rate of indium shows a decreasing trend and is generally less than 60% in sulfuric acid. Targeted at the complex lead-zinc smelting dust containing InO·xSnO, this paper proposes the chlorination leaching process of lead-zinc smelting dust to recover indium. The influence of factors such as sodium chlorate concentration, hydrochloric acid concentration, leaching temperature, sulfuric acid concentration, leaching time, liquid-solid ratio on the leaching rate of indium were investigated. The results showed that the average leaching rate of indium resulted from chlorination leaching reached 92.7% under the following conditions of sodium chlorate concentration of 20 g/L, hydrochloric acid concentration of 48 g/L, leaching temperature of 80 ℃, sulfuric acid concentration of 225 g/L, leaching time of 3.0 h, and liquid-solid ratio of L/S=5∶1(L/kg). Thus, this process can be used in the production practice to recover indium through the treatment of the complex lead-zinc smelting dust.
作者
汪秋雨
曾建华
吴仁都
蔡琥
WANG Qiu-yu;ZENG Jian-hua;WU Ren-du;CAI Hu(Jiangxi Institute of Quality and Standardization,Nanchang 330008,China;Nanchang University College of Chemistry,Nanchang 330031,China)
出处
《中国有色冶金》
CAS
北大核心
2022年第4期95-99,共5页
China Nonferrous Metallurgy
基金
国家自然科学基金(21861026)。
关键词
铅锌冶炼烟灰
中浸渣
氯化浸出
铟
回收
lead and zinc smelting dust
intermediate leaching residue
chlorination leaching
indium
recovery
