• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The 2nd International symposium on clean steel >A Kinetic Study on the Control of Nitrogen in Molten Slag and Metal
【24h】

A Kinetic Study on the Control of Nitrogen in Molten Slag and Metal

机译：熔渣和金属中氮的控制动力学研究

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

Nitrogen can easily contaminate molten steel during the steelmaking process and due to the low nitrogen capacity in slag, it is difficult to remove entrapped nitrogen from liquid steel. Degassing is often done to the steel at secondary steelmaking to lower the nitrogen content, but the control can often be kinetically limited by the steel grade and also the slag composition. Thus, a fundamental understanding of nitrogen dissolution into molten slag and metal including the rate of nitrogen dissolution can help in controlling nitrogen content in the final product.The kinetics of nitrogen dissolution in the molten calcium aluminate based slags and in molten steel with various element additions was investigated by measuring the 14N-15N isotope exchange reaction using a mass spectrometer at 1873 K.Results show that effect of elements on the rate constant of nitrogen dissolution such as Ni in Fe is relatively minimal similar to molybdenum. The surface rate constant of nitrogen dissolution in liquid Fe-10%Ni alloy was found to be 3.77x10-5 (mol/cm2-s-atm).The rate constant of nitrogen dissolution in the CaO-A12O3CaF2 slag was found to be wedge shaped, which decreased with increasing CaF2 to about 20 mol% followed by an increase through the rest of the CaF2 composition range. This was related to the effect of CaF2 on the structure of Al-O bonds for this slag.
机译：氮在炼钢过程中容易污染钢水，并且由于炉渣中氮的含量低，很难从液态钢中去除夹带的氮。通常在二次炼钢中对钢进行脱气以降低氮含量，但是控制通常在动力学上受到钢种以及炉渣成分的限制。因此，从根本上了解氮在熔融炉渣和金属中的溶解度，包括氮的溶解速率，可以帮助控制最终产品中的氮含量。在铝酸钙熔渣和钢液中添加各种元素后氮溶解的动力学通过使用质谱仪在1873 K下测量14N-15N同位素交换反应进行了研究。结果表明，元素对元素溶解氮的速率常数（如Ni在Fe中）的影响相对最小，类似于钼。液态Fe-10％Ni合金中氮溶解的表面速率常数为3.77x10-5（mol / cm2-s-atm）.CaO-Al2O3CaF2炉渣中氮溶解的速率常数为楔形随着CaF 2含量增加至约20mol％而降低，随后在整个CaF 2组成范围内增加。这与CaF2对这种渣的Al-O键结构的影响有关。

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