• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >The Rate of HF Formation During Addition of Alumina to NaF-AIF_3 Melts
【24h】

The Rate of HF Formation During Addition of Alumina to NaF-AIF_3 Melts

机译：加入氧化铝到NAF-AIF_3熔体期间的HF形成速率

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A major contributor to HF gas evolution during aluminium electrolysis is the hydrolysis of alumina water. The objectives of this work were to investigate the kinetics of HF generation, and how water residence time in the atmosphere above the bath influences the HF formation. The HF concentration in the off-gas was measured during additions of alumina to a NaF-AlF_3 melt (r = 2.2). The alumina water release rate upon rapid heating was also measured separately when alumina was added to a hot empty quartz cell. In the melt experiments, the residence time of the alumina water was varied by changing the nitrogen gas flow rate through the experimental reactor. The HF formation occurred instantly and the rate determining step is the alumina water release rate. For the range in this study, there was no effect of residence time of the gas in the reaction chamber on the amount of HF formed.
机译：铝电解过程中HF气体进化的主要原因是氧化铝水的水解。这项工作的目标是调查HF代的动力学，以及浴室高于浴室的水分停留时间如何影响HF形成。在添加氧化铝到Naf-Alf_3熔体（R = 2.2）期间测量废气中的HF浓度。当向热空石英细胞中加入氧化铝时，还单独测量快速加热时的氧化铝水释放速率。在熔融实验中，通过通过实验反应器改变氮气流速改变氮气流速来改变氧化铝水的停留时间。立即发生的HF形成，速率确定步骤是氧化铝水释放速率。对于该研究的范围，气体在反应室中的停留时间没有对形成的HF量的影响。

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