...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Influence of Surface Modification on Combustion Characteristics of Charcoal and Its Performance on Emissions Reduction in Iron Ore Sintering
【24h】

Influence of Surface Modification on Combustion Characteristics of Charcoal and Its Performance on Emissions Reduction in Iron Ore Sintering

机译：表面改性对木炭燃烧特性的影响及其对降低铁矿石烧结排放的性能

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

摘要

For bridging the huge gap of combustibility between coke breeze and charcoal in iron ore sintering, the influences of using SiO_(2) and B_(2)O_(3) as modifiers on combustion characteristics of charcoal were investigated. The results showed that due to the physical barrier function of SiO_(2) powders and the surface covering function of B_(2)O_(3) film, the porosity of modified charcoal was reduced. The combustion speed of modified charcoal was therefore slowed down and showed less differences to coke breeze than non-modified charcoal. Recommended mass percentages of SiO_(2) and B_(2)O_(3) in modified charcoal were 2% and 3% respectively. The combustion reaction activation energy of charcoal was increased from 55.54 kJ?mol~(?1) to 86.97 kJ?mol~(?1) and 92.82 kJ?mol~(?1) respectively after modification, which was close to 122.75 kJ?mol~(?1) of coke breeze. Laboratory-scale sintering tests showed that the proper replacement percentage of charcoal to coke breeze was increased from 20% to 40% after the surface modification. And the emission reduction percentages of NOx and SOx were correspondingly improved from 16.58% and 11.02% to about 28% and 37% respectively, while the average combustion efficiency was kept at the comparable level to the case using coke breeze only.
机译：为了弥合铁矿石烧结过程中焦风与木炭之间巨大的可燃性差距，研究了使用SiO_（2）和B_（2）O_（3）作为改性剂对木炭燃烧特性的影响。结果表明，由于SiO_（2）粉体的物理阻挡作用和B_（2）O_（3）膜的表面覆盖作用，改性木炭的孔隙率降低。因此，与未改性的木炭相比，改性木炭的燃烧速度减慢并且与微风的差异较小。改性木炭中SiO_（2）和B_（2）O_（3）的推荐质量百分比分别为2％和3％。改性后，木炭的燃烧反应活化能分别从55.54 kJ？mol〜（？1）增加到86.97 kJ？mol〜（？1）和92.82 kJ？mol〜（？1），接近122.75 kJ？mol〜（？1）。 mol〜（？1）轻风。实验室规模的烧结测试表明，表面改性后，木炭对微风的适当替代百分比从20％增加到40％。 NOx和SOx的排放减少百分比分别从16.58％和11.02％分别提高到约28％和37％，同时平均燃烧效率保持与仅使用焦风的情况相当。

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