• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Recovery of scandium and neodymium from blast furnace slag using acid baking-water leaching
【24h】

Recovery of scandium and neodymium from blast furnace slag using acid baking-water leaching

机译：使用酸烘烤浸出从高炉炉渣中恢复钪和钕

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

The current study puts the emphasis on developing a pyro-hydrometallurgical process, called acid baking-water leaching, to recover scandium and neodymium from blast furnace slag produced by the ironmaking industry. In this process, the feed is mixed with concentrated sulfuric acid, digested at 200-400 degrees C, and leached in water at ambient conditions. This process offers several advantages including less acidic waste generation and rapid kinetics. With fundamental investigations into the digestion mechanism, acid to slag mass ratio and baking temperature are determined to have the most significant positive and negative impacts, respectively. At low acid to slag ratio, the silicate bearing phases in the feed do not digest, resulting in low extraction. At 200 degrees C baking temperature, a hydrated aluminum sulfate ((Al(H2O)(6))(2)(SO4)(3)(H2O)(4.4)) phase with weak hydrogen bonds is formed that leaches in water rapidly (<10 min); while at 400 degrees C, Al-2(SO4)(3)with strong ionic bonds is formed that leaches at slower kinetics (>4 h). Fundamental investigations into the water leaching process indicate that the diffusion of water through the firm solid product (ash layer) is the rate determining step. We expect the results of this study would help enable valorization of industrial byproducts, in particular ironmaking slag.
机译：目前的研究强调开发一种被酸烘焙水浸出的热液冶金工艺，从铁制造工业生产的高炉渣中恢复钪和钕。在该方法中，将进料与浓硫酸混合，在200-400℃下消化，并在环境条件下在水中浸出。该过程提供了几个优点，包括酸性浪费和快速动力学。利用基本的研究进入消化机理，确定酸性熔渣质量比和烘烤温度分别具有最显着的正负影响。在低酸性到渣率时，进料中的硅酸盐轴承相位不会消化，导致萃取低。在200摄氏度烘烤温度下，用弱氢键形成的水合硫酸铝（（Al（H 2 O）（6））（2）（SO 4）（3）（4）（4.4））相迅速浸出水中浸出（ <10分钟）;在400℃下，形成具有强离子键的Al-2（SO 4）（3），其在较慢的动力学（> 4小时）下浸出。对水浸出过程的基本调查表明，水通过坚固的固体产品（灰层）的扩散是速率确定步骤。我们预计本研究的结果将有助于实现工业副产品的估值，特别是炼铁渣。

著录项

  • 来源
    《RSC Advances》 |2020年第53期|共11页
  • 作者

    Kim Jihye; Azimi Gisele;

  • 作者单位

    Univ Toronto Dept Chem Engn &

    Appl Chem Lab Strateg Mat 200 Coll St Toronto ON M5S 3E5 Canada;

    Univ Toronto Dept Chem Engn &

    Appl Chem Lab Strateg Mat 200 Coll St Toronto ON M5S 3E5 Canada;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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