氨法浸出氧化锌烟尘制取活性氧化锌

发布时间：2018-04-19 22:18

  本文选题：氧化锌烟尘 + 氨法浸出　； 参考：《材料科学与工艺》2017年05期

【摘要】：为实现冶锌废渣中锌资源的再利用,以商洛炼锌厂冶锌过程中产生的氧化锌烟尘为原料,采用氨法浸出-微波蒸氨-火法焙解工艺制得粒度分布均匀的球状活性氧化锌.对锌的浸出工艺及氧化锌前驱体的热解工艺进行研究,并利用TG/DTA、XRD、SEM等测试手段对产品进行结构及物相表征.研究表明,氨法浸出过程中总氨浓度为8 mol/L、pH为10.0、液固比为4∶1、浸出温度为40℃时,锌的浸出率最高可达92.05%.浸出液经两段净化除杂后,80℃下蒸氨25 min时,制得前驱体碱式碳酸锌.在400℃焙解120 min制得平均粒径约为3μm,六方晶系的球状活性氧化锌.此法对设备要求不高,生产成本低,工艺流程短,具有较强的实用性.
[Abstract]:In order to realize the reuse of zinc resources in the waste residue of zinc smelting, zinc oxide dust produced in the zinc smelting process of Shangluo Zinc Refining Plant was used as raw material to prepare spherical active zinc oxide with uniform particle size distribution by ammonia leaching microwave evaporation ammonia pyrolysis process. The leaching process of zinc and pyrolysis of zinc oxide precursor were studied. The structure and phase of the product were characterized by TG / DTAXRDX SEM. The results show that when the total ammonia concentration is 8 mol / L ~ (-1) pH is 10.0, the ratio of liquid to solid is 4: 1, and the leaching temperature is 40 鈩，

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