NO_x reduction in the sintering process

Yan-guang Chen1,2),Zhan-cheng Guo1,3),Zhi Wang1),Gen-sheng Feng3) 1) State Key Laboratory of Multiphase Complex System,Institute of Process Engineering,Chinese Academy Sciences,Beijing 100190,China 2) Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3) Key Laboratory of the Ministry of Education of China for Recycling & Ecologic Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

摘 要：A new process,NOx reduction with recycling flue gas and modifying coke breeze,was proposed. The effects of modified coke breeze and recycled flue gas on NOx reduction were investigated by sinter pot tests. The results show that the NOx reduction rate is over 10wt% in the sintering of modified coke breeze,the effects of the additives on NOx reduction are:CeO2>CaO>K2CO3. The NOx reduction rate increases with the amount of recycled flue gas,and is 22.35wt% in the sintering with recycling 30vol% of the flue gas. When 30vol% of the flue gas is recycled into the sintering of CeO2,CaO,and K2CO3 modified coke breeze,the NOx reduction rates are 36.10wt%,32.56wt%,and 32.17wt%,respectively.

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