Tackling on process of increasing scrap ratio of converter in smelting low-Si and Ti-containing hot metal
WANG Jie1, HUA Fu-bo1, XIE Xiang2, YANG Long-fei1, WEN An-yi1
1. Steel Rolling Business Department, Shougang Shuicheng Iron and Steel Group Co., Ltd., Liupanshui 553028, Guizhou, China; 2. Manufacturing Management Department, Shougang Shuicheng Iron and Steel Group Co., Ltd, Liupanshui 553028, Guizhou, China
Abstract：The scrap ratio is an important economic and technical indicator for converter production, and its value directly affects the iron loss and heat balance of steel smelting in the converter. Increasing the scrap ratio into the furnace is an important technical means to achieve iron saving and steel increase, cost reduction and efficiency increase. However, due to the difficulty of slag formation and dephosphorization of Ti-containing and low-Si molten iron, the scrap ratio into the furnace is not high, which directly affects the production cost of the converter. For this reason, based on the analysis of the characteristics and difficulties of Ti-containing and low-Si molten iron smelting, combined with Shougang Shuicheng Iron and Steel Group Co., Ltd production practice, through the optimization of oxygen lance nozzle and gun position, adding temperature raising agent et al process optimization and technological development,the scrap ratio increased from 7.41% to 13.48% and optimization effect is obvious, which laid a certain foundation for achieve iron saving and steel increase, cost reduction and efficiency increase.
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WANG Jie, HUA Fu-bo, XIE Xiang, YANG Long-fei, WEN An-yi. Tackling on process of increasing scrap ratio of converter in smelting low-Si and Ti-containing hot metal. CONTINUOUS CASTING, 2020, 39(6): 27-33.
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2020, Vol. 39 
