Experimental analysis on ultra-deep bed sintering in Shougang Jingtang
CHEN Shao-guo1,2, ZHANG Xiao-chen1,2, LIANG Jie1,2, WANG Dong-qing1,2, PAN Wen1,2, ZHANG Ya-peng1,2
1. Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China; 2. Beijing key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing 100043, China
Abstract：Deep bed sintering technology can improve the sinter drum strength without increasing the amount of fuel, thereby increasing the sinter yield ratio. The effects of reducing coke addition ratio on bed permeability, bed heat distribution, sinter yield and quality, flue gas emission volume per ton of sinter, and pollutant emission per ton of sinter were quantitatively studied by sintering cup test under different bed height and ultra-deep bed height, and suitable coke addition ratio for ultra-deep bed sintering was explored. The results show that, when the height of sinter bed is gradually increases from 800 mm to 950 mm, increasing the bed height under the same coke addition ratio can greatly improve the sinter yield and quality and various sintering indexes, thus creating conditions for reducing the coke addition ratio. When the height of sinter bed is 950 mm and the coke addition ratio is 4.3%, except the decrease of vertical sintering speed and sintering utilization coefficient, sintering indexes such as sinter yield and quality, sinter yield ratio and low temperature reduction pulverization index can be obtained, which are equivalent to the indexes of sinter bed height of 800 mm and the coke addition ratio of 4.5%. Meanwhile, sintering solid fuel consumption decreases by about 6%, flue gas emission volume per ton of sinter and pollutant emission per ton of sinter decrease significantly, NO and SO2 emission amount per ton decreases 24% and 35%, respectively.
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2023, Vol. 33 
