Influence of O_2 Content in Circulating Flue Gas on Iron Ore Sintering

作     者：FAN Xiao-hui YU Zhi-yuan GAN Min LI Wen-qi JI Zhi-yun 

作者机构：School of Minerals Processing and Bioengineering Central South University 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2013年第20卷第6期

页      面：1-6页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：Item Sponsored by National Natural Science Foundation of China ( 51174253 ) Fundamental Research Funds for Central Universities of China ( NCET-05-0630 ) Graduate Student Degree Thesis Innovation Foundation of Hunan Province of China (1343/74333001114) 

主　　题：flue gas circulation sintering heat front flame front sintering metallogenium 

摘      要：Circulating flue gas can reduce the emission of flue gas , and furthermore , it can reuse the waste heat effectively in the sintering *** with conventional sintering , O2 that gets through the sintering bed decreases because of substituting circulating gas for *** influences of O2 content on sintering process are studied through simulating the flue gas circulation sintering with artificial *** shows that , with the reducing of O2 content in circulating gas , the combustion speed of fuel decreases and incomplete combustion degree increases , which makes the flame front fall behind the heat front and reduces the heat utilization efficiency of *** ultimate result is that the temperature of sintering bed decreases and the liquid phase *** addition , the reducing atmosphere is strengthened because of flue gas circulation , which makes the magnetite increase yet calcium ferrite reduce gradually. Because the content of calcium ferrite with good strength reduces , the sinter yield and tumble strength *** ensure the sinter index , the favorable O2 content of circulating flue gas is no less than 15%.