• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>41th Annual Conference of Metallurgists of CIM International Symposium on New Technology Implementation Metallurgical Processes Aug 11-14, 2002 Montreal, Quebec, Canada >Production of zinc sulfate from zinc containing waste materials in galvanization processes
【24h】

Production of zinc sulfate from zinc containing waste materials in galvanization processes

机译：在镀锌过程中由含锌废料生产硫酸锌

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In many factories, which are working in the field of steel industry, there are galvanization units in which steel products are galvanized for corrosion protection. About 15% of the total amount of the used zinc is accumulated as zinc ash and dust at the surface of molten zinc bath and in the chimney respectively. In a previous work, zinc was successfully recovered from the coarse ash by applying pyrometallurgical processing. The objectives of this work are to improve the efficiency of the galvanization units and to add economic value, through production of pure zinc sulfate from fines of the ash, slag of pyrometallurgical processing and dust (zinc fines blend). This is also enhanced with the target of decreasing the environmental pollution, as these materials are recurrent toxic species. Zinc fines blend was hydrometallurgically treated by leaching with sulfuric acid. Different parameters affecting leaching and crystallization processes such as solid/liquid ratio, temperature and time were studied. Zinc sulfate was separated from residue by filtration. The residue washed with hot water with washing efficiency amounts to 99.2%. Zinc sulfate hydrate (ZnSO_4·H_2O) was crystallized by concentrating the produced liquor to a density of 1.52 g/cm~3. The purity of the produced zinc sulfate is about 99.5%.
机译：在许多从事钢铁工业领域工作的工厂中，都有镀锌单元，在这些单元中对钢材进行镀锌以防腐蚀。所用锌总量的约15％分别作为锌灰和粉尘积累在熔融锌浴的表面和烟囱中。在以前的工作中，通过火法冶金成功地从粗灰中回收了锌。这项工作的目的是通过从粉煤灰，火法冶金渣和粉尘（锌粉混合物）生产纯硫酸锌来提高镀锌单元的效率并增加经济价值。由于这些材料是经常性有毒物质，因此以减少环境污染为​​目标也得到了加强。锌细粉混合物通过硫酸浸出进行湿法冶金处理。研究了影响浸出和结晶过程的不同参数，例如固液比，温度和时间。通过过滤从残余物中分离出硫酸锌。用热水洗涤的残留物的洗涤效率为99.2％。通过浓缩产生的液体至1.52g / cm〜3的密度，使水合硫酸锌（ZnSO_4·H_2O）结晶。产生的硫酸锌的纯度为约99.5％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号