Effect of Ca-Fe oxides additives on NOx reduction in iron ore sintering

作     者：Zhi-yuan Yu Xiao-hui Fan Min Gan Xu-ling Chen 

作者机构：Hunan Research Academy of Environmental SciencesChangsha 410004HunanChina School of Mineral Processing and BioengineeringCentral South UniversityChangsha 410083HunanChina 

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

年 卷 期：2017年第24卷第12期

页      面：1184-1189页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学] 

主　　题：Iron ore sintering NOx reduction Ca Fe oxide Coke combustion Sinter index 

摘      要：As the emission control regulations get stricter,the NO;reduction in the sintering process becomes an important environmental concern owing to its role in the formation of photochemical smog and acid *** NOxemissions from the sintering machine account for 48% of total amount from the iron and steel ***,it is essential to reduce NO;emissions from the sintering machine,for the achievement of clean production of ***-Fe oxides,serving as the main binding phase in the sinter,are therefore used as additives into the sintering mixture to reduce *** results show that the NO;reduction ratio achieves 27.76% with 8% Ca-Fe oxides additives since the Ca-Fe oxides can advance the ignition and inhibit the nitrogen oxidation compared with the conventional ***,the existence of Ca-Fe oxides was beneficial to the sinter quality since they were typical low melting point *** optimal mass fraction of Ca-Fe oxides additives should be less than 8%since the permeability of sintering bed was significantly decreased with a further increase of the Ca-Fe oxides fines,inhibiting the mineralization reaction of sintering ***,the appropriate particle size can be obtained when mixing an equal amount of Ca-Fe oxides additives of-0.5 mm and 0.5-3.0 mm in size.