• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Effect of Circulating Elements on the Dynamic Reduction Swelling Behaviour of Olivine and Acid Iron Ore Pellets under Simulated Blast Furnace Shaft Conditions
【24h】

Effect of Circulating Elements on the Dynamic Reduction Swelling Behaviour of Olivine and Acid Iron Ore Pellets under Simulated Blast Furnace Shaft Conditions

机译：模拟高炉竖井条件下循环元素对橄榄石和酸性铁矿石球团动态还原溶胀行为的影响

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

Sulphur and alkalis in the blast furnace gas have been associated affecting the reduction swelling behaviour of iron ore pellets. A tube furnace was used in this study to examine the dynamic reduction swelling behaviour of olivine and acid pellets in CO-CO_2-N_2 atmosphere with sulphur and potassium in gaseous phases up to 1 100℃ simulating the conditions in the blast furnace shaft. No abnormal swelling was detected in sulphur or potassium containing CO-CO_2-N_2 atmospheres during dynamic reduction. Instead, sulphur in the reducing atmosphere was associated with pellet contraction and FeO-FeS melt formation which became more dominant with increasing sulphur partial pressures. In the extreme case, having a maximum of 1.0 vol-% S_2 gas in the reducing atmosphere, the reduction reaction of wustite to metallic iron was hindered. The formation of FeO-FeS liquid phase extends the cohesive zone towards the blast furnace top and lower temperatures and decreases the gas permeability. Furthermore, large amounts of potassium in the reducing atmosphere (max. 0.03 vol-%) led to swelling and cracking in the olivine pellets still remaining in the range of normal swelling.
机译：高炉煤气中的硫和碱与铁矿石球团还原溶胀行为有关。本研究使用管式炉来模拟高炉竖井中的条件，研究了CO-CO_2-N_2气氛中橄榄石和酸丸在气相中硫和钾高达1100℃的动态还原溶胀行为。动态还原过程中，在含硫或钾的CO-CO_2-N_2气氛中未检测到异常溶胀。相反，还原性气氛中的硫与颗粒收缩和FeO-FeS熔体形成有关，随着硫分压的增加，FeO-FeS熔体的形成变得更加明显。在极端的情况下，还原气氛中的S_2气体含量最高为1.0 vol％，阻碍了钙铁矿向金属铁的还原反应。 FeO-FeS液相的形成将粘结区延伸到高炉顶部和较低的温度，并降低了气体渗透性。此外，还原性气氛中的大量钾（最大0.03％（体积））导致橄榄石颗粒的溶胀和开裂，仍然保持在正常溶胀的范围内。

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