Melt splashing behavior of steelmaking converter with nozzle-twisted lance
LI Lin1,2, LI Ming-ming1,2, LI Qiang1,2, ZOU Zong-shu1,2
1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China; 2. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
Abstract：In BOF steelmaking, the splashing of molten steel has a significant influence on the performance of the converter reactor. Oxygen lance is the operation unit that generates supersonic oxygen jets and controls their behavior and plays a critical role in controlling the splashing. The splashing of steelmaking converter with a nozzle-twisted lance was studied with water model experiments. The effects of the nozzle twist angle design of the nozzle-twisted lance and its operation parameters on the splashing rate and spatial distribution of splashing were discussed. And on this basis, the effect of nozzle-twisted lance on the performance of the converter reactor was analyzed. The results show that, compared with the splashing rate in converter with traditional oxygen lance, the splashing rate and height in the converter with the nozzle-twisted lance decreases. Also, the distribution of splashing droplets in radial space is more uniform. This splashing distribution trend is more pronounced with the increase of the nozzle twist angle. The melt quantity splashed onto the converter mouth and out of the converter is decreased to zero when the nozzle twist is bigger than 20°. For the converter with a nozzle-twisted lance, the splashing rate as well as the radial and vertical distribution of splashing quantity increase with the increase of top blowing flow rate but have a dynamic effect by the lance height depending on the nozzle twist angle.
李琳, 李明明, 李强, 邹宗树. 漩流氧枪转炉炼钢熔体的喷溅行为[J]. 钢铁, 2020, 55(6): 54-60.
LI Lin, LI Ming-ming, LI Qiang, ZOU Zong-shu. Melt splashing behavior of steelmaking converter with nozzle-twisted lance. Iron and Steel, 2020, 55(6): 54-60.
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