Optimal design of salamander depth in blast furnace
WEI Hong-chao1, LEI Ming1, DU Ping1, GUO Zi-yu2, GAO Tian-lu2, ZHANG Jian-liang2
1. Ironmaking Plant, Shasteel United Iron and Steel Co., Ltd., Zhangjiagang 215625, Jiangsu, China; 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract：The salamander depth in the hearth of the blast furnace is one of the important design parameters of the blast furnace, and it has a significant impact on the life of the blast furnace. The optimization of the salamander depth in the large blast furnace was aimed at. Based on the statistics of the dead iron layer depth of some blast furnaces at home and abroad of 2 000, 2 500, 3 000, 4 000 and 5 000 m3, it is obtained that the salamander depth in China accounts for 19.7%-23.3%. By establishing the force model of the deadman, under the condition that the deadman is floating on furnace bottom, it is calculated that the suitable salamander depths of the 2 000, 3 000, 4 000 and 5 000 m3 blast furnaces are 23.8%, 24.3%, 24.8%, and 25.5%. By analyzing the relationship between the blast furnace design parameters, operating parameters, and the salamander depth, it is proposed that in the actual production of blast furnaces in China, in order to promote the deadman floating and increase the actual salamander depth, it is possible to appropriately increase the coke ratio, reduce the porosity of the lump zone, increase the wind speed, reduce the difference between the blast pressure and the furnace top pressure, and control the porosity of deadman between 0.40-0.48. It will provide guidance for the optimization design of the salamander and the operation of the blast furnace in the future.
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2021, Vol. 56 
