锌冶炼高铁酸浸渣预酸化-二氧化硫还原浸出研究  

Study on Pre-acidification and SO_(2)Reduction Leaching of High-iron Acid Leaching Slag in Zinc Smelting

作　　者：冉厚建 张国华 李云 俞凌飞 RAN Houjian;ZHANG Guohua;LI Yun;YU Lingfei(Yunxi Wenshan Zinc Indium Smelting Co.,Ltd.,Wenshan 663700,China)

机构地区：[1]云锡文山锌铟冶炼有限公司,云南文山663700

出　　处：《绿色矿冶》2024年第1期40-43,共4页Sustainable Mining and Metallurgy

摘　　要：针对目前SO_(2)还原浸出工艺处理锌浸出渣存在的理论探索试验较少、工艺多样化研究不足等问题,开展了预酸化-SO_(2)还原浸出工艺处理高铁酸浸渣试验研究,分析了提前预酸化对SO_(2)还原浸出锌浸出率、反应时间、还原后矿浆沉降性的影响。结果显示,在浓硫酸浓度100 g/L、反应温度90℃、反应时间1.5 h的条件下进行预酸化,再进行SO_(2)还原浸出反应,锌浸出率可达96%,且SO_(2)还原段反应时间可缩短至1.5 h;当预酸化硫酸浓度在90~110 g/L时,还原后矿浆沉降性较好。In view of the problems of less theoretical experiments and insufficient research on process diversification in the treatment of zinc leaching residue by SO_(2)reduction leaching process,the experimental study on the treatment of high-iron acid leaching residue by pre-acidification and SO_(2)reduction leaching process was carried out to explore the effect of pre-acidification on the zinc leaching rate of SO_(2)reduction leaching,the reaction time of SO_(2)reduction leaching section and the sedimentation of pulp after reduction.The results show that the leaching rate of zinc can reach 96%and the reaction time of SO_(2)reduction section can be shortened to 1.5 h under the conditions of concentrated sulfuric acid concentration of 100 g/L,reaction temperature of 90℃and reaction time of 1.5 h.When the concentration of pre-acidified sulfuric acid is 90~110 g/L,the slurry sedimentation after reduction is better.

关 键 词：锌浸出渣 SO_(2)还原浸出 预酸化 沉降 

分 类 号：TF813[冶金工程—有色金属冶金]