Research and Practice on the Technology of Ultra-Thick Bed Sintering of Iron Ore in Shougang Jingtang Sintering Plant

This paper analyzes the formation law of liquid phase in the process of ultra-thick bed sinteringUltra-thick bed sintering and emphatically expounds the key technology and production practice effect of two 500 m2 sintering machines of Shougang Jingtang. Through the implementation of ultra-thick bed sinteringUltra-thick bed sintering, Jingtang sintering machine has achieved good results in terms of sintered ore quality, process energy consumptionProcess energy consumption and pollutant discharge. The comprehensive solid fuel consumption of sintering has dropped from 53.95 kg/t in the base period to 48.86 kg/t, ignition gas consumption decreased from 2.391 m3/t to 1.553 m3/t; sintering utilization coefficient increased from 1.27 t/(m2 h) to a relatively high level of 1.40 t/(m2 h), sintering return fines rate decreased, quality indicators such as drum strength and screening index of sinter remained stable; flue gas volume decreased from 2280 Nm3/t to 1779 Nm3/t, a decrease of 21.0%; and NOx emission decreased from 0.58 kg/t to 0.46 kg/t, 20.3% reduction.