...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>High temperature materials and processes >Kinetics Calculation of the Non-isothermal Reduction of Pellet
【24h】

Kinetics Calculation of the Non-isothermal Reduction of Pellet

机译：球团非等温还原的动力学计算

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 reduction tests of pellet were carried out from room temperature to 1,373 K in the condition of traditional blast furnace (TBF) and oxygen blast furnace (OBF) by thermogravimeter measurement. The apparent activation energy E, pre-exponential factor A and the controlling steps of reaction were determined by the non-isothermal method of Coats-Redfern. In the condition of TBF, the reduction is controlled by solid diffusion to inter-facial chemical reaction at initial stage, and gas diffusion at final stage. In the condition of OBF, the controlling step switched from solid diffusion to gas diffusion + interfacial chemical reaction in the beginning and the interfacial chemical reaction at the late stage. Meanwhile, the transition temperature points of the controlling step were predicted. The transition temperatures are 750 ℃ and 900 ℃ in TBF and 630 ℃ (earlier 120 ℃ than in TBF) and 900 ℃ (after the insulation) in OBF.
机译：在传统高炉（TBF）和氧气高炉（OBF）的条件下，通过热重计测量，从室温到1373 K进行颗粒还原试验。通过Coats-Redfern的非等温法确定了表观活化能E，指数前因子A和反应控制步骤。在TBF的条件下，还原是通过在初始阶段由固相扩散到界面化学反应和在最后阶段由气体扩散来控制的。在OBF的条件下，控制步骤从开始的固相扩散切换为气体扩散+界面化学反应，后期进行界面化学反应。同时，预测了控制步骤的转变温度点。 TBF的转变温度分别为750℃和900℃，OBF的转变温度为630℃（比TBF早120℃）和900℃（绝缘后）。

著录项

  • 来源
    《High temperature materials and processes》 |2016年第5期|507-514|共8页
  • 作者

    Liu Yingli; Wang Jingsong; Guo Wentao; Dong Zeshang; Xue Qingguo;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    oxygen blast furnace; non-isothermal; kinetics; pellet;

    机译：氧气高炉非等温动力学;颗粒;

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