Reducing Carbon and Nitrogen Oxides Emission in Iron Ore Sintering Process by Double-Layer Pre-sintering Technology

摘要

Aiming at reduction of carbon and nitrogen oxides emission in Iron ore sintering process and increasing of sintering productivity, a new technology of double-layer pre-sintering has been developed. The new technology is quite different from the conventional single-layer sintering and has been adopted in No. 2 sintering workshop of Anshan Iron and Steel Group Co. Ltd. During the industrial-scale pilot at a 360 m~2 sintering machine for 26 weeks, the total emission of carbon and nitrogen oxides was decreased by 45239.8 tons and 615.4 tons, respectively, the productivity of sintering machine increased from 450.6 to 523.2 t/h that is equal to a 16.11% increase of output. The blast furnace used for the sinter produced through the new process is in good condition and a good economic and environmental result has been achieved.