Experimental study on NO reduction with catalysis of sinter
WAN Jun-ying1,2,CHEN Tie-jun1,2,ZHOU Xian-lin1,2,LUO Yan-hong1,2,HUANG Kai-wei1,2
1. School of Resources and Environmental Engineering， Wuhan University of Science and Technology，Wuhan 430081， Hubei， China;2. Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources， Wuhan 430081， Hubei， China
Abstract：Abstract：In the Work Plan for Ultralow Emission Reduction of Iron and Steel Enterprises（Draft for Soliciting Opinions）， it is planned to control the concentration of NOx emission in sintered flue gas below 50mg/m3， so it is imperative to reduce NOx emission of sintered flue gas. With the sinter itself as a denitration catalyst and reducing gas CO produced in the sintering process as a reducing agent, the effects of particle size， roasting temperature， space velocity， CO/NO mole fraction ratio and O2 volume fraction on catalytic denitration of sinter were systematically investigated. The results show that the volume fraction of O2 has a great influence on the conversion rate of NO in catalytic reduction of sinter; when the volume fractions of CO and O2 are 3% and 1.04%， respectively, the NO conversion rate can reach 68.83%. When the volume fraction of O2 decreases below 0.90%， the conversion rate of NO can reach 95%. Under the conditions of no O2， the sinter size of 0.2-1.0mm， the temperature of 500℃， the space velocity of 3000h-1， and the CO/NO mole fraction ratio of 6， the conversion rate of NO can reach 99.58%. The application of sinter as catalyst can effectively promote the reduction of CO to NO， which has very important environmental protection significance and economic application prospect.
万军营，陈铁军，周仙霖，罗艳红，黄开伟. 烧结矿催化还原NO的实验研究[J]. 钢铁研究学报, 2019, 31(4): 354-360.
WAN Jun-ying, CHEN Tie-jun, ZHOU Xian-lin, LUO Yan-hong, HUANG Kai-wei. Experimental study on NO reduction with catalysis of sinter. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(4): 354-360.
2019, Vol. 31 
