Effect of different bottom blowing elements on stirring characteristics of molten bath in converter

doi:10.1007/s42243-023-01082-5

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Abstract The bottom blowing element is the key equipment to ensure the bottom blowing effect of the converter. Three types of bottom blowing elements, dispersive type (D1), double circular seam (D2) and straight cylinder type (D3), were built, and the effects of bottom blowing element type on molten bath flow, wall erosion and furnace bottom erosion were simulated. It was found that when the bottom blowing elements of dispersive type (D1) and double circular seam (D2) were used, the dead zone area in the lower part of the molten bath was smaller, and the high-speed zone area was larger; therefore, the stirring effect on the bottom melt was better. When the straight cylinder type (D3) bottom blowing element was used, the gas penetrated the molten bath at a faster rate to reach the surface of molten bath and failed to disperse in the bottom molten bath, and the wall shear stress near the nozzle outlet was larger. When argon was blown by three different bottom blowing elements, the area of the wall shear stress greater than 3 Pa was 4.8, 5.6 and 8.7 cm2, respectively, within 0.2 m of the bottom blowing nozzle outlet.

Key words： Converter steelmaking Bottom blowing element Molten bath stirring Wall erosion

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	Articles by authors
	Ming Lv
	Shuang-ping Chen
	Hong-min Guo
	Yi-jie Hao
	Xiang-dong Xing

Cite this article:

Ming Lv,Shuang-ping Chen,Hong-min Guo, et al. Effect of different bottom blowing elements on stirring characteristics of molten bath in converter[J]. Journal of Iron and Steel Research International, 2024, 31(02): 368-376.