Abstract：Under the background of energy saving and emission reduction, it is vital to clarify the main influencing factors and its influence law of the activated coke denitration of sintering flue gas for reducing NOx emission in sintering process. Firstly, the results of infrared spectroscopy and simulation tests demonatrate that the phenol and quinone content increase during recycling of activated coke in flue gas purification process, hence the decrease of NO adsorption capacity, which resulting in the decrease of initial denitration rate of active coke. The ammonia pre-adsorption treatment to recycled activated coke can greatly promotes its initial denitration rate. It can be deduced that the denitration rate from top to bottom of cross-flow denitration tower experienced 100%, rapid decreasing, slow rising until equilibrium. Secondly, based on the production data statistical analysis of activated coke sintering flue gas purification system, the result shows that denitration rate is positively correlated with the NH3-NOx ratio, O2 content, NOx content and desorption temperature, and negatively correlated with the H2O content, SO2 content, flue gas flow, and activated carbon bed temperature. Besides, NH3-NOx ratio, O2 content and NOx content have the greatest influence on the denitration rate. There are multiple collinear phenomena between the process parameters. The increasing of sintering air leakage rate or air supplement will cause the change of many process parameters. While, they are generally beneficial to denitrification rate.
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